List of counties in Colorado

Last updated
Counties of Colorado
Location State of Colorado
Number64
Government

The U.S. of State of Colorado is divided into 64 counties. Counties are important units of government in Colorado since there are no townships or other minor civil divisions. Two of these counties, Broomfield and Denver, have consolidated city and county governments.

Contents

Colorado's ISO 3166-2:US state code is US-CO and its ANSI INCITS 38:2009 state code is 08.

History

On November 1, 1861, the new Territory of Colorado created 17 original counties: Arapahoe, Boulder, Clear Creek, Costilla, Douglas, El Paso, Fremont, Gilpin, Guadalupe, Huerfano, Jefferson, Lake, Larimer, Park, Pueblo, Summit, and Weld; plus the Cheyenne Reserve.

On February 9, 1866, the first new county, Las Animas, was created, followed by Saguache in December of that year. Bent County was created in February 1870, followed by Greenwood the following month. On February 2, 1874, Grand County and Elbert County were formed, and on February 10, La Plata, Hinsdale, and Rio Grande counties were created. Greenwood was absorbed into Bent on February 5. The last county to be created under the Colorado Territory name was San Juan County, created three months before statehood.

By the time Colorado became a state on August 1, 1876, it had only 26 counties. In January 1877, Routt and Ouray were formed, followed by Gunnison and Custer counties in March. In February 1879, Chaffee County was created. From February 8–10, 1879, Lake county was renamed Carbonate County. In 1881, Dolores County and Pitkin County were created. In 1883, Montrose, Mesa, Garfield, Eagle, Delta, and San Miguel counties were formed, leaving the total number of counties at 39. The number rose to 40 in 1885 with the creation of Archuleta County on April 14. Washington County and Logan County were both created in 1887. Between February 19 and April 16 in 1889, Morgan, Yuma, Cheyenne, Otero, Rio Blanco, Phillips, Sedgwick, Kiowa, Kit Carson, Lincoln, Prowers, Baca, and Montezuma counties were formed, bringing the total to 55. By 1900, Mineral County and Teller County had been added. On November 15, 1902, Arapahoe County was split into Adams and South Arapahoe Counties, and Denver was consolidated as a city and county from portions of both newly formed counties on December 1, 1902. [1] By 1912, Jackson County, Moffat County, and Crowley County had been created. Alamosa was created in 1913, and in 2001, Broomfield was consolidated as a city and county, bringing the total to 64 counties.

Table of counties

County
FIPS code [2] [3] County seat [4] [5] Est. [6] Formed from [6] Etymology [6] Population [7] Area [4] Map
AdamsCounty 001 Brighton 1902-11-15Split from Arapahoe County.Named in honor of Alva Adams, the 5th, 10th, and 14th Governor of the State of Colorado.441,6031,182.29 sq mi
(3,062 km2)
Map of Colorado highlighting Adams County.svg
AlamosaCounty 003 Alamosa 1913-03-08Split from Costilla County and Conejos County.Named for the cottonwood trees which grow along the Rio Grande and its tributaries. Alamosa is a Spanish word for a cottonwood grove.15,445723.21 sq mi
(1,873 km2)
Map of Colorado highlighting Alamosa County.svg
ArapahoeCounty 005 Littleton 1861-11-01Created as one of the 17 original counties of the Territory of Colorado. Renamed South Arapahoe County for the five months from November 15, 1902 to April 11, 1903.Named for predecessor Arapahoe County, Kansas Territory, which in turn was named for the Arapaho Nation of Native Americans.572,003804.41 sq mi
(2,083 km2)
Map of Colorado highlighting Arapahoe County.svg
ArchuletaCounty 007 Pagosa Springs 1885-04-14Split from Conejos County.Named in honor of Colorado State Senator Antonio D. Archuleta and his father, José Manuel Archuleta.12,0841,354.53 sq mi
(3,508 km2)
Map of Colorado highlighting Archuleta County.svg
BacaCounty 009 Springfield 1889-04-16Split from Las Animas County.Named in honor of pioneer and Colorado territorial legislator Felipe Baca.3,7882,558.48 sq mi
(6,626 km2)
Map of Colorado highlighting Baca County.svg
BentCounty 011 Las Animas 1870-02-11Split from Huerfano County and former Cheyenne and Arapaho tribal land.Named in honor of frontier trader William Bent.6,4991,541.07 sq mi
(3,991 km2)
Map of Colorado highlighting Bent County.svg
BoulderCounty 013 Boulder 1861-11-01Created as one of the 17 original counties of the Territory of Colorado.Named for the abundance of granite boulders along Boulder Creek.294,567740.48 sq mi
(1,918 km2)
Map of Colorado highlighting Boulder County.svg
City and County of Broomfield 014 Broomfield 2001-11-15Split from Boulder, Adams, Jefferson, and Weld counties and reorganized as a consolidated city and county.Named for the broom corn that was formerly grown in the area.55,88933.57 sq mi
(87 km2)
Map of Colorado highlighting Broomfield County.svg
ChaffeeCounty 015 Salida 1879-02-10Split from Carbonate County.Named in honor of Jerome Bunty Chaffee, one of Colorado's first two U.S. Senators from 1876 to 1879.17,8091,014.12 sq mi
(2,627 km2)
Map of Colorado highlighting Chaffee County.svg
CheyenneCounty 017 Cheyenne Wells 1889-03-25Split from Elbert and Bent counties.Named for the Cheyenne Nation of Native Americans.1,8361,781.90 sq mi
(4,615 km2)
Map of Colorado highlighting Cheyenne County.svg
Clear CreekCounty 019 Georgetown 1861-11-01Created as one of the 17 original counties of the Territory of Colorado.Named for Clear Creek which originates in the county.9,088396.53 sq mi
(1,027 km2)
Map of Colorado highlighting Clear Creek County.svg
ConejosCounty 021 Conejos 1861-11-01 Guadalupe County, one of the 17 original counties of the Territory of Colorado, was renamed Conejos County after six days on November 7, 1861.Named for the cottontail rabbits in the area. Conejos is a Spanish word for rabbits.8,2561,290.22 sq mi
(3,342 km2)
Map of Colorado highlighting Conejos County.svg
CostillaCounty 023 San Luis 1861-11-01Created as one of the 17 original counties of the Territory of Colorado.Named for the Costilla River. Costilla is a Spanish word meaning either little rib or furring timber.3,5241,229.38 sq mi
(3,184 km2)
Map of Colorado highlighting Costilla County.svg
CrowleyCounty 025 Ordway 1911-05-29Split from Otero County.Named in honor of Colorado State Senator John H. Crowley.5,823800.27 sq mi
(2,073 km2)
Map of Colorado highlighting Crowley County.svg
CusterCounty 027 Westcliffe 1877-03-09Split from Fremont County.Named in memory of George Armstrong Custer, (1839 - 1876), the U.S. Army colonel defeated and killed at the Battle of the Little Bighorn.4,255739.24 sq mi
(1,915 km2)
Map of Colorado highlighting Custer County.svg
DeltaCounty 029 Delta 1883-02-11Split from Gunnison County.Named for the town of Delta located at the delta of the Uncompahgre River.30,9521,149.44 sq mi
(2,977 km2)
Map of Colorado highlighting Delta County.svg
City and County of Denver 031 Denver 1902-12-01The original Arapahoe County Seat was split from Arapahoe and the newly-created Adams Counties, and reorganized as a consolidated city and county.Named to curry favor with James W. Denver, Governor of the Territory of Kansas from 1857 to 1859.600,158155.66 sq mi
(403 km2)
Map of Colorado highlighting Denver County.svg
DoloresCounty 033 Dove Creek 1881-03-04Split from Ouray County.Named for the Dolores River, which was originally named el Rio de Nuestra Senora de los Dolores, which is Spanish for the River of our Lady of Sorrows.2,0641,076.93 sq mi
(2,789 km2)
Map of Colorado highlighting Dolores County.svg
DouglasCounty 035 Castle Rock 1861-11-01Created as one of the 17 original counties of the Territory of Colorado.Named in honor of Stephen Arnold Douglas, (1813 - 1861), U.S. Senator from Illinois from 1847 to 1861.285,465842.30 sq mi
(2,182 km2)
Map of Colorado highlighting Douglas County.svg
EagleCounty 037 Eagle 1883-02-11Split from Summit County.Named for the Eagle River which originates in the county.52,1971,700.76 sq mi
(4,405 km2)
Map of Colorado highlighting Eagle County.svg
El PasoCounty 041 Colorado Springs 1861-11-01Created as one of the 17 original counties of the Territory of Colorado.Named for Ute Pass, which connects the Great Plains to South Park and was formerly located within the county. El Paso means the pass in Spanish.622,2632,128.60 sq mi
(5,513 km2)
Map of Colorado highlighting El Paso County.svg
ElbertCounty 039 Kiowa 1874-02-02Split from Douglas County.Named in honor of Samuel Hitt Elbert, the sixth Governor of the Territory of Colorado.23,0861,849.08 sq mi
(4,789 km2)
Map of Colorado highlighting Elbert County.svg
FremontCounty 043 Cañon City 1861-11-01Created as one of the 17 original counties of the Territory of Colorado.Named in honor of John Charles Frémont (1813 - 1890), the explorer, U.S. Army general, and U.S. Senator from California.46,8241,533.09 sq mi
(3,971 km2)
Map of Colorado highlighting Fremont County.svg
GarfieldCounty 045 Glenwood Springs 1883-02-10Split from Summit County.Named in honor of James Abram Garfield (1831 - 1881), the twentieth President of the United States.56,3892,958.23 sq mi
(7,662 km2)
Map of Colorado highlighting Garfield County.svg
GilpinCounty 047 Central City 1861-11-01Created as one of the 17 original counties of the Territory of Colorado.Named in honor of William Gilpin, the first Governor of the Territory of Colorado.5,441150.15 sq mi
(389 km2)
Map of Colorado highlighting Gilpin County.svg
GrandCounty 049 Hot Sulphur Springs 1874-02-02Split from Summit County.Named for the Grand River which originates in the county. The Grand River was renamed the Colorado River in 1921, but the county retains the original name.14,8431,868.53 sq mi
(4,839 km2)
Map of Colorado highlighting Grand County.svg
GunnisonCounty 051 Gunnison 1877-03-09Split from Lake County.Named in honor of John Williams Gunnison, the U.S. Army captain who explored the region.15,3243,259.22 sq mi
(8,441 km2)
Map of Colorado highlighting Gunnison County.svg
HinsdaleCounty 053 Lake City 1874-02-10Split from Lake, Conejos, and Costilla counties.Named in honor of George Aaron Hinsdale, a Lieutenant Governor of the Territory of Colorado.8431,123.35 sq mi
(2,909 km2)
Map of Colorado highlighting Hinsdale County.svg
HuerfanoCounty 055 Walsenburg 1861-11-01Created as one of the 17 original counties of the Territory of Colorado.Named for Huerfano Butte, a solitary volcanic plug. Huerfano is a Spanish word meaning orphan.6,7111,592.37 sq mi
(4,124 km2)
Map of Colorado highlighting Huerfano County.svg
JacksonCounty 057 Walden 1909-05-05Split from Larimer County.Named in honor of Andrew Jackson (1767 - 1845), the seventh President of the United States.1,3941,619.75 sq mi
(4,195 km2)
Map of Colorado highlighting Jackson County.svg
JeffersonCounty 059 Golden 1861-11-01Created as one of the 17 original counties of the Territory of Colorado.Named for its extralegal predecessor county, Jefferson County, Jefferson Territory, which in turn was named in honor of Thomas Jefferson (1743 - 1826), the author of the Declaration of Independence and the third President of the United States.534,543772.85 sq mi
(2,002 km2)
Map of Colorado highlighting Jefferson County.svg
KiowaCounty 061 Eads 1889-04-11Split from Bent County.Named for the Kiowa Nation of Native Americans.1,3981,785.90 sq mi
(4,625 km2)
Map of Colorado highlighting Kiowa County.svg
Kit CarsonCounty 063 Burlington 1889-04-11Split from Elbert County.Named in honor of Christopher Houston "Kit" Carson, the famous frontier scout and soldier.8,2702,162.43 sq mi
(5,601 km2)
Map of Colorado highlighting Kit Carson County.svg
La PlataCounty 067 Durango 1874-02-10Split from Lake and Conejos counties.Named for the many silver deposits in the area. La plata is a Spanish expression for the silver.51,3341,700.44 sq mi
(4,404 km2)
Map of Colorado highlighting La Plata County.svg
LakeCounty 065 Leadville 1861-11-01Created as one of the 17 original counties of the Territory of Colorado. Renamed Carbonate County for the two days from February 8–10, 1879.Named for the Twin Lakes in the county.7,310383.55 sq mi
(993 km2)
Map of Colorado highlighting Lake County.svg
LarimerCounty 069 Fort Collins 1861-11-01Created as one of the 17 original counties of the Territory of Colorado.Named in honor of William Larimer, a pioneer entrepreneur.299,6302,631.75 sq mi
(6,816 km2)
Map of Colorado highlighting Larimer County.svg
Las AnimasCounty 071 Trinidad 1866-02-09Split from Huerfano County.Named for the Purgatoire River, which was originally named el Rio de las Animas Perdidas, which is Spanish for the River of the Souls in Purgatory.15,5074,773.27 sq mi
(12,363 km2)
Map of Colorado highlighting Las Animas County.svg
LincolnCounty 073 Hugo 1889-04-11Split from Elbert and Bent counties.Named in honor of Abraham Lincoln (1809 - 1865), the sixteenth President of the United States.5,4672,585.21 sq mi
(6,696 km2)
Map of Colorado highlighting Lincoln County.svg
LoganCounty 075 Sterling 1887-02-25Split from Weld County.Named in honor of John Alexander Logan (1826 - 1886), a U.S. Army general and U.S. Senator from Illinois.22,7091,845.31 sq mi
(4,779 km2)
Map of Colorado highlighting Logan County.svg
MesaCounty 077 Grand Junction 1883-02-14Split from Gunnison County.Named for the mesa formations which are widespread through the area.146,7233,345.69 sq mi
(8,665 km2)
Map of Colorado highlighting Mesa County.svg
MineralCounty 079 Creede 1893-03-27Split from Hinsdale, Rio Grande, and Saguache counties.Named from the plentiful mineral deposits found in the area.712878.16 sq mi
(2,274 km2)
Map of Colorado highlighting Mineral County.svg
MoffatCounty 081 Craig 1911-02-27Split from Routt County.Named in honor of railroad pioneer David H. Moffat.13,7954,755.86 sq mi
(12,318 km2)
Map of Colorado highlighting Moffat County.svg
MontezumaCounty 083 Cortez 1889-04-16Split from La Plata County.Named in honor of Aztec leader Moctezuma II. Ruins in the area were once thought to be Aztec.25,5352,035.80 sq mi
(5,273 km2)
Map of Colorado highlighting Montezuma County.svg
MontroseCounty 085 Montrose 1883-02-11Split from Gunnison County.Named for the town of Montrose, which in turn was probably named from the novel A Legend of Montrose , published in 1819 by Walter Scott.41,2762,246.43 sq mi
(5,818 km2)
Map of Colorado highlighting Montrose County.svg
MorganCounty 087 Fort Morgan 1889-02-19Split from Weld County.Named for old Fort Morgan, which in turn was named in honor of U.S. Army Colonel Christopher A. Morgan.28,1591,293.83 sq mi
(3,351 km2)
Map of Colorado highlighting Morgan County.svg
OteroCounty 089 La Junta 1889-03-25Split from Bent County.Named in honor of Miguel A. Otero of the prominent Otero family of the Southwest.18,8311,267.66 sq mi
(3,283 km2)
Map of Colorado highlighting Otero County.svg
OurayCounty 091 Ouray 1877-01-18Split from Hinsdale and Lake counties. Renamed Uncompaghre County for four days from 1883-02-27, to 1883-03-02.Named in honor of Ouray, a Ute Native American leader.4,436542.30 sq mi
(1,405 km2)
Map of Colorado highlighting Ouray County.svg
ParkCounty 093 Fairplay 1861-11-01Created as one of the 17 original counties of the Territory of Colorado.Named for South Park which occupies most of the county.16,2062,209.36 sq mi
(5,722 km2)
Map of Colorado highlighting Park County.svg
PhillipsCounty 095 Holyoke 1889-03-27Split from Logan County.Named in honor of R.O. Phillips, secretary of the Lincoln Land Company, which sold farmsteads in the area.4,442688.30 sq mi
(1,783 km2)
Map of Colorado highlighting Phillips County.svg
PitkinCounty 097 Aspen 1881-02-23Split from Gunnison County.Named in honor of Frederick Walker Pitkin, the second Governor of the State of Colorado.17,148970.37 sq mi
(2,513 km2)
Map of Colorado highlighting Pitkin County.svg
ProwersCounty 099 Lamar 1889-04-11Split from Bent County.Named in honor of John W. Prowers, a pioneer of the Arkansas River valley.12,5511,645.37 sq mi
(4,261 km2)
Map of Colorado highlighting Prowers County.svg
PuebloCounty 101 Pueblo 1861-11-01Created as one of the 17 original counties of the Territory of Colorado.Named for historic town of Pueblo. Pueblo is a Spanish word meaning village or people.159,0632,396.77 sq mi
(6,208 km2)
Map of Colorado highlighting Pueblo County.svg
Rio BlancoCounty 103 Meeker 1889-03-25Split from Garfield County.Named for the White River, which was originally named Rio Blanco in Spanish.6,6663,226.24 sq mi
(8,356 km2)
Map of Colorado highlighting Rio Blanco County.svg
Rio GrandeCounty 105 Del Norte 1874-02-10Split from Costilla County and Conejos County counties.Named for the Rio Grande, which flows through the area.11,982913.10 sq mi
(2,365 km2)
Map of Colorado highlighting Rio Grande County.svg
RouttCounty 107 Steamboat Springs 1877-01-29Split from Grand County.Named in honor of John Long Routt, the first Governor of the State of Colorado.23,5092,362.11 sq mi
(6,118 km2)
Map of Colorado highlighting Routt County.svg
SaguacheCounty 109 Saguache 1866-12-29Split from Lake and Costilla counties.Name comes from a Ute language noun meaning "sand dunes". [8] [9] 6,1083,168.32 sq mi
(8,206 km2)
Map of Colorado highlighting Saguache County.svg
San JuanCounty 111 Silverton 1876-01-31Split from Lake County.Named for the San Juan River and San Juan Mountains, which in turn were named for Saint John the Evangelist.699388.99 sq mi
(1,007 km2)
Map of Colorado highlighting San Juan County.svg
San MiguelCounty 113 Telluride 1883-03-02Split from San Juan County.Named for the San Miguel River and San Miguel Mountains, which in turn were named for Saint Michael the Archangel.7,3591,290.76 sq mi
(3,343 km2)
Map of Colorado highlighting San Miguel County.svg
SedgwickCounty 115 Julesburg 1889-04-09Split from Logan County.Named for Fort Sedgwick, which, in turn, was named for U.S. Army General John Sedgwick (1813 - 1864).2,379548.83 sq mi
(1,421 km2)
Map of Colorado highlighting Sedgwick County.svg
SummitCounty 117 Breckenridge 1861-11-01Created as one of the 17 original counties of the Territory of Colorado.Named for the many high mountain summits in the area.27,994618.92 sq mi
(1,603 km2)
Map of Colorado highlighting Summit County.svg
TellerCounty 119 Cripple Creek 1899-03-23Split from El Paso and Fremont counties.Named in honor of Henry Moore Teller, a U.S. Senator from Colorado and United States Secretary of the Interior.23,350558.58 sq mi
(1,447 km2)
Map of Colorado highlighting Teller County.svg
WashingtonCounty 121 Akron 1887-02-09Split from Weld County.Named in honor of George Washington (1732 - 1799), the first President of the United States.4,8142,522.90 sq mi
(6,534 km2)
Map of Colorado highlighting Washington County.svg
WeldCounty 123 Greeley 1861-11-01Created as one of the 17 original counties of the Territory of Colorado.Named in honor of Lewis Ledyard Weld, the first Secretary of the Territory of Colorado.252,8254,013.84 sq mi
(10,396 km2)
Map of Colorado highlighting Weld County.svg
YumaCounty 125 Wray 1889-03-15Split from Washington County.Named for the Quechan (Yuma) Nation of Native Americans.10,0432,369.61 sq mi
(6,137 km2)
Map of Colorado highlighting Yuma County.svg

Table of county statistics

An enlargeable map of the 64 counties of the state of Colorado Map of Colorado counties, labelled.svg
An enlargeable map of the 64 counties of the state of Colorado

The following sortable table lists the 64 counties of the state of Colorado with the following information:

  1. The official name of the county, [10]
  2. The International Committee for Information Technology Standards (INCITS) county code. [11]
  3. The date the county was established, [12]
  4. The county seat, [13]
  5. The rank among the 64 counties of Colorado by population as of July 1, 2013, as estimated by the United States Census Bureau, [11]
  6. The county population as of July 1, 2013, as estimated by the United States Census Bureau, [11]
  7. The county population as of April 1, 2010, as enumerated by the 2010 United States Census, [11]
  8. The percent population change from April 1, 2010, to July 1, 2013, [11]
  9. A link to a detailed transportation map of the county. [14]
  10. The average population density per land area of the county as of July 1, 2012, [11]
  11. The land area of the county, [11]
  12. The water area of the county, [11]
  13. The total area of the county, [11]
  14. The maximum surface elevation in the county, [15] [16] [17]
  15. The minimum surface elevation in the county, [17] [18] [19]
  16. The reference latitude of the county, [11] and
  17. The reference longitude of the county. [11]
The 64 Counties of the State of Colorado

CountyINCITSDate EstablishedCounty SeatPop Rank2013 Pop2010 CensusPop ChangeMapPop DensityLand AreaWater AreaTotal AreaMax ElevMin ElevLatitudeLongitude
Adams County 080011902-11-15 Brighton 5469,193441,603+6.25% map 39.87° N104.33° W
Alamosa County 080031913-03-08 Alamosa 2916,25315,445+5.23% map 37.57° N105.79° W
Arapahoe County 080051861-11-01 Littleton 3607,070572,003+6.13% map 39.64° N104.33° W
Archuleta County 080071885-04-14 Pagosa Springs 3612,19412,084+0.91% map 37.20° N107.05° W
Baca County 080091889-04-16 Springfield 553,6823,788−2.80% map 37.30° N102.54° W
Bent County 080111870-02-11 Las Animas 475,6886,499−12.48% map 37.93° N103.08° W
Boulder County 080131861-11-01 Boulder 7310,048294,567+5.26% map 40.09° N105.40° W
080142001-11-15 Broomfield 1259,47155,889+6.41% map 39.95° N105.05° W
Chaffee County 080151879-02-10 Salida 2718,51017,809+3.94% map 38.74° N106.32° W
Cheyenne County 080171889-03-25 Cheyenne Wells 591,8901,836+2.94% map 38.84° N102.60° W
Clear Creek County 080191861-11-01 Georgetown 399,0319,088−0.63% map 39.69° N105.67° W
Conejos County 080211861-11-07 Conejos 408,2778,256+0.25% map 37.21° N106.18° W
Costilla County 080231861-11-01 San Luis 563,5183,524−0.17% map 37.28° N105.43° W
Crowley County 080251911-05-29 Ordway 505,3225,823−8.60% map 38.32° N103.79° W
Custer County 080271877-03-09 Westcliffe 544,2854,255+0.71% map 38.10° N105.37° W
Delta County 080291883-02-11 Delta 1830,48330,952−1.52% map 38.86° N107.86° W
080311902-12-01 Denver 2649,495600,158+8.22% map 39.76° N104.88° W
Dolores County 080331881-03-04 Dove Creek 582,0292,064−1.70% map 37.75° N108.53° W
Douglas County 080351861-11-01 Castle Rock 8305,963285,465+7.18% map 39.33° N104.93° W
Eagle County 080371883-02-11 Eagle 1552,46052,197+0.50% map 39.63° N106.69° W
Elbert County 080391874-02-02 Kiowa 2223,73323,086+2.80% map 39.31° N104.12° W
El Paso County 080411861-11-01 Colorado Springs 1655,044622,263+5.27% map 38.83° N104.53° W
Fremont County 080431861-11-01 Cañon City 1646,45146,824−0.80% map 38.46° N105.42° W
Garfield County 080451883-02-10 Glenwood Springs 1357,30256,389+1.62% map 39.60° N107.91° W
Gilpin County 080471861-11-01 Central City 485,6015,441+2.94% map 39.86° N105.53° W
Grand County 080491874-02-02 Hot Sulphur Springs 3314,28914,843−3.73% map 40.12° N106.10° W
Gunnison County 080511877-03-09 Gunnison 3115,50715,324+1.19% map 38.67° N107.08° W
Hinsdale County 080531874-02-10 Lake City 62813843−3.56% map 37.81° N107.38° W
Huerfano County 080551861-11-01 Walsenburg 456,5196,711−2.86% map 37.69° N104.96° W
Jackson County 080571909-05-05 Walden 611,3651,394−2.08% map 40.66° N106.33° W
Jefferson County 080591861-11-01 Golden 4551,798534,543+3.23% map 39.59° N105.25° W
Kiowa County 080611889-04-11 Eads 601,4231,398+1.79% map 38.39° N102.76° W
Kit Carson County 080631889-04-11 Burlington 418,0378,270−2.82% map 39.31° N102.60° W
Lake County 080651861-11-01 Leadville 437,3067,310−0.05% map 39.20° N106.35° W
La Plata County 080671874-02-10 Durango 1453,28451,334+3.80% map 37.29° N107.84° W
Larimer County 080691861-11-01 Fort Collins 6315,988299,630+5.46% map 40.66° N105.48° W
Las Animas County 080711866-02-09 Trinidad 3214,44615,507−6.84% map 37.32° N104.04° W
Lincoln County 080731889-04-11 Hugo 495,4305,467−0.68% map 38.99° N103.51° W
Logan County 080751887-02-25 Sterling 2522,45022,709−1.14% map 40.73° N103.09° W
Mesa County 080771883-02-14 Grand Junction 11147,554146,723+0.57% map 39.02° N108.46° W
Mineral County 080791893-03-27 Creede 63721712+1.26% map 37.65° N106.93° W
Moffat County 080811911-02-27 Craig 3413,10313,795−5.02% map 40.57° N108.20° W
Montezuma County 080831889-04-16 Cortez 2125,64225,535+0.42% map 37.34° N108.60° W
Montrose County 080851883-02-11 Montrose 1740,71341,276−1.36% map 38.41° N108.26° W
Morgan County 080871889-02-19 Fort Morgan 2028,40428,159+0.87% map 40.26° N103.81° W
Otero County 080891889-03-25 La Junta 2618,70318,831−0.68% map 37.88° N103.72° W
Ouray County 080911877-01-18 Ouray 524,5574,436+2.73% map 38.15° N107.77° W
Park County 080931861-11-01 Fairplay 3016,12116,206−0.52% map 39.12° N105.72° W
Phillips County 080951889-03-27 Holyoke 534,3564,442−1.94% map 40.59° N102.35° W
Pitkin County 080971881-02-23 Aspen 2817,37917,148+1.35% map 39.22° N106.92° W
Prowers County 080991889-04-11 Lamar 3512,29112,551−2.07% map 37.96° N102.39° W
Pueblo County 081011861-11-01 Pueblo 10161,451159,063+1.50% map 38.17° N104.49° W
Rio Blanco County 081031889-03-25 Meeker 446,8076,666+2.12% map 39.97° N108.20° W
Rio Grande County 081051874-02-10 Del Norte 3711,80311,982−1.49% map 37.49° N106.45° W
Routt County 081071877-01-29 Steamboat Springs 2323,51323,509+0.02% map 40.48° N106.99° W
Saguache County [8] [9] 081091866-12-29 Saguache 466,2086,108+1.64% map 38.03° N106.25° W
San Juan County 081111876-01-31 Silverton 64692699−1.00% map 37.78° N107.67° W
San Miguel County 081131883-03-02 Telluride 427,6787,359+4.33% map 38.01° N108.43° W
Sedgwick County 081151889-04-09 Julesburg 572,3602,379−0.80% map 40.87° N102.36° W
Summit County 081171861-11-01 Breckenridge 1928,64927,994+2.34% map 39.62° N106.14° W
Teller County 081191899-03-23 Cripple Creek 2423,27523,350−0.32% map 38.87° N105.18° W
Washington County 081211887-02-09 Akron 514,8034,814−0.23% map 39.97° N103.21° W
Weld County 081231861-11-01 Greeley 9269,785252,825+6.71% map 40.56° N104.38° W
Yuma County 081251889-03-15 Wray 3810,15110,043+1.08% map 40.00° N102.42° W
State of Colorado 081876-08-01 Denver 5,268,3675,029,196+4.76% map 103,641.884 mi2
268,431.246 km2
451.779 mi2
1,170.101 km2
104,093.662 mi2
269,601.348 km2
14,440 ft
4401 m
3,317 ft
1011 m
38.99° N105.51° W

County high points

Former counties

The sortable table below lists all the historic counties of the Territory of New Mexico, the Territory of Utah, the Territory of Kansas, and the extralegal Territory of Jefferson [20] that previously existed within the boundaries of the present State of Colorado, as well as the three defunct counties of the Territory of Colorado and the three defunct counties of the State of Colorado. The table includes the following information:

  1. The official name of the county,
  2. The territory or state,
  3. The date the county was created,
  4. The date the county was abolished or excluded from the new Territory of Colorado, and
  5. Historical notes.
Counties formerly within the area of the State of Colorado

CountyTerritory or StateCreatedSupersededHistory
Taos County Territory of New Mexico 1852-01-091861-02-28Originally one of the seven partidos of the Spanish, and later Mexican, province of Santa Fe de Nuevo México. One of the nine original counties created by the Territory of New Mexico in 1852. Excluded from the new Territory of Colorado in 1861.
Great Salt Lake County Territory of Utah 1852-03-031861-02-28Created in 1852, and excluded from the new Territory of Colorado in 1861.
Green River County Territory of Utah 1852-03-031861-02-28Created in 1852, but never organized. Dissolved in 1857, but recreated in 1859. Excluded from the new Territory of Colorado in 1861, and the Territory of Wyoming in 1868. Finally dissolved in 1872.
Iron County Territory of Utah 1852-03-031861-02-28Created in 1852, and excluded from the new Territory of Colorado in 1861.
Sanpete County Territory of Utah 1852-03-031861-02-28Created in 1852, and excluded from the new Territory of Colorado in 1861.
Utah County Territory of Utah 1852-03-031861-02-28Created in 1852, and excluded from the new Territory of Colorado in 1861.
Washington County Territory of Utah 1852-03-031861-02-28Created in 1852, and excluded from the new Territory of Colorado in 1861.
Arapahoe County Territory of Kansas 1855-08-251861-01-29Created in 1855, but never organized. Reverted to unorganized territory when Kansas joined the Union in 1861.
Beaver County Territory of Utah 1856-01-051861-02-28Split from Iron and Millard counties in 1856. Excluded from the new Territory of Colorado in 1861.
Broderick County Territory of Kansas 1859-02-071861-01-29Split from Arapahoe County in 1859, but never organized. Reverted to unorganized territory when Kansas joined the Union in 1861.
El Paso County Territory of Kansas 1859-02-071861-01-29Split from Arapahoe County in 1859, but never organized. Reverted to unorganized territory when Kansas joined the Union in 1861.
Fremont County Territory of Kansas 1859-02-071861-01-29Split from Arapahoe County in 1859, but never organized. Reverted to unorganized territory when Kansas joined the Union in 1861.
Montana County Territory of Kansas 1859-02-071861-01-29Split from Arapahoe County in 1859, but never organized. Reverted to unorganized territory when Kansas joined the Union in 1861.
Oro County Territory of Kansas 1859-02-071861-01-29Split from Arapahoe County in 1859, but never organized. Reverted to unorganized territory when Kansas joined the Union in 1861.
Peketon County Territory of Kansas 1859-02-071861-01-29Created in 1859, but never organized. Reverted to unorganized territory when Kansas joined the Union in 1861.
Arrappahoe County Territory of Jefferson 1859-11-281861-02-28One of the 12 counties created by the extralegal Territory of Jefferson in 1859.
Cheyenne County Territory of Jefferson 1859-11-281861-02-28One of the 12 counties created by the extralegal Territory of Jefferson in 1859.
El Paso County Territory of Jefferson 1859-11-281861-02-28One of the 12 counties created by the extralegal Territory of Jefferson in 1859.
Fountain County Territory of Jefferson 1859-11-281861-02-28One of the 12 counties created by the extralegal Territory of Jefferson in 1859.
Heele County Territory of Jefferson 1859-11-281861-02-28One of the 12 counties created by the extralegal Territory of Jefferson in 1859.
Jackson County Territory of Jefferson 1859-11-281861-02-28One of the 12 counties created by the extralegal Territory of Jefferson in 1859.
Jefferson County Territory of Jefferson 1859-11-281861-02-28One of the 12 counties created by the extralegal Territory of Jefferson in 1859.
Mountain County Territory of Jefferson 1859-11-281861-02-28One of the 12 counties created by the extralegal Territory of Jefferson in 1859.
North County Territory of Jefferson 1859-11-281861-02-28One of the 12 counties created by the extralegal Territory of Jefferson in 1859.
Park County Territory of Jefferson 1859-11-281861-02-28One of the 12 counties created by the extralegal Territory of Jefferson in 1859.
St. Vrain County Territory of Jefferson 1859-11-281861-02-28One of the 12 counties created by the extralegal Territory of Jefferson in 1859.
Saratoga County Territory of Jefferson 1859-11-281861-02-28One of the 12 counties created by the extralegal Territory of Jefferson in 1859.
Mora County Territory of New Mexico 1860-02-011861-02-28Split from Taos County and San Miguel County in 1860. Excluded from the new Territory of Colorado in 1861.
Guadalupe County Territory of Colorado 1861-11-011861-11-07One of the 17 original counties created by the Territory of Colorado in 1861. The county was renamed Conejos County after only six days.
Greenwood County Territory of Colorado 1870-02-111874-02-06Created from former Cheyenne and Arapaho tribal land and the eastern portion of Huerfano County in 1870. The county was abolished in 1874 and its territory split between Elbert County and Bent County.
Platte County Territory of Colorado 1872-02-091874-02-09Created from the eastern portion of Weld County in 1872. The county was abolished in 1874 after organizers failed to secure voter approval. The territory of the county was returned to Weld County.
Carbonate County State of Colorado 1879-02-081879-02-10 Lake County was renamed Carbonate County in 1879. Only two days later, Carbonate County was split into the new Chaffee County and a recreated Lake County.
Uncompahgre County State of Colorado 1883-02-271883-03-02 Ouray County was renamed Uncompahgre County for only four days in 1883.
South Arapahoe County State of Colorado 1902-11-151903-04-11One of three counties created from Arapahoe County in 1902. The name was changed back to Arapahoe County after five months.

No organized counties of the District of Louisiana, the Territory of Missouri, the extralegal State of Deseret, or the Territory of Nebraska existed within the present boundaries of the state of Colorado.

County distinctions

1. Costilla County was the first area within the present State of Colorado to be settled by Europeans in 1851.
2. Taos County, created by the Territory of New Mexico in 1852, was the first organized county to extend into the area of the present State of Colorado.
3. Arapahoe County, created by the Territory of Kansas in 1855, was the first county created exclusively within the area of the present State of Colorado.
4. On November 28, 1859, the extralegal Territory of Jefferson created 12 counties: [20]
The 12 counties of the
Territory of Jefferson
CountyCounty Seat
Arrappahoe County Denver City
Cheyenne County
El Paso County Colorado City
Fountain County Pueblo
Heele County La Porte
Jackson County Boulder City
Jefferson County Arapahoe City
Golden City
Mountain County Central City
North County
Park County Tarryall City
St. Vrain's County St. Vrain
Saratoga County Breckinridge
5. On November 1, 1861, the Territory of Colorado created the 17 original Colorado counties: [12]
The 17 original counties of the
Territory of Colorado
CountyFirst County Seat
Arapahoe County Denver City
Boulder County Boulder City
Clear Creek County Idaho
Costilla County San Miguel
Douglas County Franktown
El Paso County Colorado City
Fremont County Cañon City
Gilpin County Central City
Guadaloupe County Guadaloupe
Huerfano County Autobees
Jefferson County Golden City
Lake County Oro City
Larimer County La Porte
Park County Tarryall City
Pueblo County Pueblo
Summit County Parkville
Weld County St. Vrain
6. Of the 17 original Colorado counties created in 1861, only Gilpin County and Clear Creek County have retained their original boundaries with only minor survey changes.
7. Guadalupe County was the first Colorado county to be renamed in 1861.
8. Las Animas County was the first new Colorado county to be created (in 1866) after the original 17 counties.
9. Greenwood County was the longest lived former Colorado county, existing four years from 1870 to 1874.
10. In 1876, San Juan County became the last county created by the Territory of Colorado.
11. In 1877, Ouray County became the first county created by the new State of Colorado.
12. Carbonate County was the shortest lived former Colorado county, existing only two days in 1879 before being dissolved.
13. The City and County of Broomfield became the newest Colorado county in 2001.
14. Las Animas County is the most extensive Colorado county.
15. The City and County of Broomfield is the least extensive Colorado county.
16. El Paso County is the most populous Colorado county.
17. San Juan County is the least populous Colorado county.
18. El Paso County and the City and County of Denver are among the 100 most populous counties of the United States.
19. San Juan County, Mineral County, Hinsdale County, Jackson County, Kiowa County, Cheyenne County, and Dolores County are among the 100 least populous counties of the United States.
20. The City and County of Denver is the most densely populated Colorado county.
21. Hinsdale County is the least densely populated Colorado county.
22. Hinsdale County, Kiowa County, Mineral County, and Jackson County have fewer than one resident per square mile (0.386 km−2).
23. Lake County has the highest point in Colorado at the summit of Mount Elbert at an elevation of 14,440 feet (4,401.2 m), the highest summit of all the Rocky Mountains of North America.
24. Yuma County has the lowest point in Colorado where the Arikaree River flows into Kansas at an elevation of 3,317 feet (1,011 m), the highest low point of any U.S. state.
25. Summit County, Pitkin County, and Eagle County each had a 2014 life expectancy of more than 85 years, the three longest-life counties in the United States. [21]
26. Jefferson County borders ten other counties, the most of any Colorado county. [22]
27. Delta County and the City and County of Denver each border only three other counties, the fewest of Colorado counties. [23]
28. The following twelve Colorado counties have a county seat with the same name as the county:
CountyCounty Seat
Alamosa County City of Alamosa
Boulder County City of Boulder
City and County of Broomfield City and County of Broomfield
Conejos County unincorporated town of Conejos
Delta County City of Delta
City and County of Denver City and County of Denver
Eagle County Town of Eagle
Gunnison County City of Gunnison
Montrose County City of Montrose
Ouray County City of Ouray
Pueblo County City of Pueblo
Saguache County Town of Saguache
29. The name of each of the following two Colorado counties forms one part of the name of its county seat:
CountyCounty Seat
Cheyenne County Town of Cheyenne Wells
Morgan County City of Fort Morgan
30. Albeit somewhat confusing, the following towns have the same name as another county:
TownCounty
Arapahoe Cheyenne County
Dolores Montezuma County
Garfield Chaffee County
Jefferson Park County
Kiowa Elbert County
Kit Carson Cheyenne County
Las Animas Bent County
Moffat Saguache County
Montezuma Summit County
Pitkin Gunnison County
31. Weld County has the most incorporated municipalities of any Colorado county with 31.
32. The following nine Colorado counties have no incorporated municipalities other than their county seat:
CountyCounty Seat
Archuleta County Town of Pagosa Springs
Bent County City of Las Animas
City and County of Broomfield City and County of Broomfield
City and County of Denver City and County of Denver
Hinsdale County Town of Lake City
Jackson County Town of Walden
Lake County City of Leadville
Mineral County Town of Creede
San Juan County Town of Silverton
33. Of all 64 Colorado counties, only Conejos County has a county seat that is not an incorporated municipality.
34. Only three Colorado county seats extend into other counties:
CountyCounty SeatOther Counties
Adams County City of Brighton Weld County
Arapahoe County City of Littleton Douglas County and Jefferson County
Gilpin County Central City Clear Creek County
35. The City and County of Denver and the City and County of Broomfield are the only two Colorado counties with enclaves.
36. Arapahoe County, Boulder County, and Jefferson County are the only three dismembered Colorado counties with exclaves.
36. San Juan County has the highest mean elevation of any U.S. county at 11,240 feet (3,426 m). The 25 highest U.S. counties by mean elevation are: [24]
Highest Counties in the United States
RankCountyStateMean Elevation
1 San Juan County Flag of Colorado.svg  Colorado 11,240 feet (3,426 m)
2 Hinsdale County Flag of Colorado.svg  Colorado 10,826 feet (3,300 m)
3 Lake County Flag of Colorado.svg  Colorado 10,790 feet (3,289 m)
4 Mineral County Flag of Colorado.svg  Colorado 10,411 feet (3,173 m)
5 Summit County Flag of Colorado.svg  Colorado 10,365 feet (3,159 m)
6 Clear Creek County Flag of Colorado.svg  Colorado 10,264 feet (3,128 m)
7 Pitkin County Flag of Colorado.svg  Colorado 9,940 feet (3,030 m)
8 Chaffee County Flag of Colorado.svg  Colorado 9,915 feet (3,022 m)
9 Park County Flag of Colorado.svg  Colorado 9,572 feet (2,918 m)
10 Gunnison County Flag of Colorado.svg  Colorado 9,488 feet (2,892 m)
11 Gilpin County Flag of Colorado.svg  Colorado 9,236 feet (2,815 m)
12 Grand County Flag of Colorado.svg  Colorado 9,204 feet (2,805 m)
13 Saguache County Flag of Colorado.svg  Colorado 9,193 feet (2,802 m)
14 Teller County Flag of Colorado.svg  Colorado 9,052 feet (2,759 m)
15 Rio Grande County Flag of Colorado.svg  Colorado 9,011 feet (2,747 m)
16 Custer County Flag of Colorado.svg  Colorado 8,988 feet (2,740 m)
17 Eagle County Flag of Colorado.svg  Colorado 8,987 feet (2,739 m)
18 Ouray County Flag of Colorado.svg  Colorado 8,951 feet (2,728 m)
19 Jackson County Flag of Colorado.svg  Colorado 8,863 feet (2,701 m)
20 Conejos County Flag of Colorado.svg  Colorado 8,774 feet (2,674 m)
21 Costilla County Flag of Colorado.svg  Colorado 8,681 feet (2,646 m)
22 Taos County Flag of New Mexico.svg  New Mexico 8,510 feet (2,594 m)
23 Summit County Flag of Utah.svg  Utah 8,388 feet (2,557 m)
24 Dolores County Flag of Colorado.svg  Colorado 8,280 feet (2,524 m)
25 Archuleta County Flag of Colorado.svg  Colorado 8,101 feet (2,469 m)

See also

Related Research Articles

Adams County, Colorado County in Colorado, US

Adams County is a county located in the U.S. state of Colorado. As of the 2010 census, the population was 441,603. The county seat is Brighton. The county is named for Alva Adams, an early Governor of the State of Colorado in 1887–1889.

Denver metropolitan area Place in Colorado, United States

Denver is the central city of a conurbation region in the U.S. state of Colorado. The conurbation includes one continuous region consisting of the six central counties of Adams, Arapahoe, Broomfield, Denver, Douglas, and Jefferson. The Denver region is part of the Front Range Urban Corridor.

Jefferson County, Colorado County in Colorado, US

Jefferson County, is a county located in the U.S. state of Colorado. As of the 2010 census, the population was 534,543, making it the fourth-most populous county in Colorado. The county seat is Golden, and the most populous city is Lakewood.

Arapahoe County, Colorado County in Colorado, US

Arapahoe County is a county located in the U.S. state of Colorado. As of the 2010 census, its population was 572,003, making it the third-most populous county in Colorado. The county seat is Littleton, and the most populous city is Aurora. The county was named for the Arapaho Native American tribe, who once lived in the region.

Broomfield, Colorado City and county in Colorado, United States

The City and County of Broomfield is a consolidated city and county located in the U.S. State of Colorado. Broomfield has a consolidated government which operates under Article XX, Sections 10-13 of the Constitution of the State of Colorado. Broomfield is a part of the Denver–Aurora–Lakewood, CO Metropolitan Statistical Area. Its population was 55,889 at the 2010 United States Census, making it the 16th most populous municipality and the 13th most populous county in Colorado.

Strasburg, Colorado Census Designated Place in Colorado, United States

Strasburg is an unincorporated town, a post office, and a census-designated place (CDP) located in and governed by Adams and Arapahoe counties, Colorado, United States. The CDP is a part of the Denver–Aurora–Lakewood, CO Metropolitan Statistical Area. The Strasburg post office has the ZIP Code 80136. At the United States Census 2010, the population of the Strasburg CDP was 2,447, while the population of the 80136 ZIP Code Tabulation Area was 4834 including adjacent communities.

Columbine, Colorado Census Designated Place in Colorado, United States

Columbine is an unincorporated community and a census-designated place (CDP) located in and governed by Jefferson and Arapahoe counties, Colorado, United States. The CDP is a part of the Denver–Aurora–Lakewood, CO Metropolitan Statistical Area. Located primarily in Jefferson County, Columbine lies immediately south of Denver. The population of the Columbine CDP was 24,280 at the United States Census 2010. The community lies in ZIP code 80123.

Jefferson Territory

The Territory of Jefferson was an extralegal and unrecognized United States territory that existed from October 24, 1859 until the creation of the Colorado Territory on February 28, 1861. The Jefferson Territory included land officially part of the Kansas Territory, the Nebraska Territory, the New Mexico Territory, the Utah Territory, and the Washington Territory, but the area was remote from the governments of those five territories. The government of the Jefferson Territory, while democratically elected, was never legally recognized by the United States government, although it managed the territory with relatively free rein for 16 months. Many of the laws enacted by the Jefferson Territorial Legislature were reenacted and given official sanction by the new Colorado General Assembly in 1861.

Watkins, Colorado Census Designated Place in Colorado, United States

Watkins is an unincorporated town and a census-designated place (CDP) located in and governed by Arapahoe and Adams counties, Colorado, United States. The CDP is a part of the Denver–Aurora–Lakewood, CO Metropolitan Statistical Area. The town is surrounded by Aurora and its post office, which lies within the Aurora city limits, has the ZIP Code 80137. At the United States Census 2010, the population of the Watkins CDP was 653, while the population of the 80137 ZIP Code Tabulation Area was 1,323 including adjacent communities.

Littleton, Colorado Home Rule Municipality in Colorado, United States

The City of Littleton is a Home Rule Municipality located in Arapahoe, Douglas, and Jefferson counties, Colorado, United States. Littleton is the county seat of Arapahoe County and is a part of the Denver–Aurora–Lakewood, CO Metropolitan Statistical Area. The city population was 41,737 at the 2010 United States Census, ranking as the 20th most populous municipality in the State of Colorado.

Denver–Aurora combined statistical area Place in Colorado, United States

The United States Office of Management and Budget has defined the 12-county Denver–Aurora, CO Combined Statistical Area comprising the Denver–Aurora–Lakewood, CO Metropolitan Statistical Area, the Boulder, CO Metropolitan Statistical Area, and the Greeley, CO Metropolitan Statistical Area. The United States Census Bureau estimates that the population was 3,214,218 as of July 1, 2012, an increase of +3.99% since the 2010 United States Census, and ranking as the 16th most populous metropolitan combined statistical area and the 17th most populous primary statistical area of the United States. The population estimate for 2016 is 3,412,607.

Jefferson County was a county of the extralegal United States Territory of Jefferson that existed from November 28, 1859, until February 28, 1861. Its territory covered a broad swath surrounding the region of the Pike's Peak Gold Rush, and was a functioning democratically elected government until the organization of the Territory of Colorado in 1861. At that time, the successor Jefferson County was permanently created, taking its name from its predecessor and incorporating the heart of its territory.

Arapahoe County was a county of Kansas Territory in the United States that existed from August 25, 1855, until Kansas's admission into the Union on January 29, 1861.

Arapahoe County was a county of the extralegal United States Territory of Jefferson that existed from November 28, 1859, until February 28, 1861. The county name was also spelled Arapaho County, Arapahoe County, Arrapahoe County, and Arappahoe County. The county seat was Denver City.

Index of Colorado-related articles Wikipedia list article

The following is an alphabetical list of articles related to the U.S. state of Colorado.

Outline of Colorado Overview of and topical guide to Colorado

The following outline is provided as an overview of and topical guide to the U.S. state of Colorado:

References

  1. City Council of the City and County of Denver v. Board of Commissioners of Adams County, 77P.858, 861 (1904).
  2. "EPA County FIPS Code Listing". EPA.gov. Retrieved 2008-02-23.
  3. The ANSI INCITS 31:2009 county code is the five-digit code which uniquely identifies counties and county equivalents in the United States. The three-digit number is unique to each individual county within a state, but to be unique within the entire United States, it must be prefixed by the two-digit ANSI INCITS 31:2009 state code. This means that, for example, while Adams County, Colorado is 001, Belknap County, New Hampshire and Alachua County, Florida are also 001. To uniquely identify Adams County, Colorado, one must use the state code of 08 plus the county code of 001; therefore, the unique nationwide identifier for Adams County, Colorado is 08001. The links in the column INCITS are to the Census Bureau Info page for that county.
  4. 1 2 National Association of Counties. "NACo - Find a county". Archived from the original on September 27, 2007. Retrieved 2008-04-30.
  5. "Colorado County Seats". State of Colorado, Department of Public Health and Environment. 2007-01-30. Retrieved 2007-01-30.
  6. 1 2 3 "Colorado Government History". State of Colorado, Department of Personnel & Administration, Colorado State Archives. 2001-04-18. Retrieved 2008-09-25.
  7. "2010 United States Census website". United States Census Bureau, Population Division. Archived from the original on October 6, 2013. Retrieved April 22, 2011.
  8. 1 2 The name "Saguache" is pronounced /səˈwæ/ . This name comes from the Ute language noun "sawup" /səˈwʌp/ meaning "sand dunes". The Spanish language version of this name is usually spelled "Saguache", while the English language version is usually spelled "Sawatch".
  9. 1 2 Merkl, Dameon (February 26, 2013), "What's in a Colorado name pronunciation?", The Denver Post , retrieved March 7, 2013
  10. "Colorado Counties as of May 1, 2011". State of Colorado, Department of Local Affairs. May 1, 2011. Archived from the original on July 1, 2007. Retrieved May 2, 2011.
  11. 1 2 3 4 5 6 7 8 9 10 11 "Annual Estimates of the Resident Population for Counties: April 1, 2010 to July 1, 2013". 2013 Population Estimates. United States Census Bureau, Population Division. March 2014. Retrieved April 18, 2014.
  12. 1 2 "Colorado Government History". State of Colorado, Department of Personnel & Administration, Colorado State Archives. April 18, 2001. Retrieved May 2, 2011.
  13. "Colorado County Seats". State of Colorado, Department of Public Health and Environment. Retrieved May 2, 2011.
  14. "Colorado Department of Transportation Maps". State of Colorado, Department of Transportation. Archived from the original on June 12, 2011. Retrieved May 6, 2011.
  15. See the Table of the highest major summits of Colorado
  16. "Colorado County High Points". peakbagger.com. Retrieved May 2, 2011.
  17. 1 2 Elevations include an adjustment from the National Geodetic Vertical Datum of 1929 (NGVD 29) to the North American Vertical Datum of 1988 (NAVD 88). For further information, please see this United States National Geodetic Survey note.
  18. "Colorado County Maps". anyplaceamerica.com. Retrieved May 2, 2011.
  19. Only a few of these county low points have been verified.
  20. 1 2 Provisional Laws and Joint Resolutions of the General Assembly of Jefferson Territory. General Assembly of the Territory of Jefferson. 1859–1860. Retrieved 2011-05-05.
  21. Dwyer-Lindgren, Laura (8 May 2017). "Inequalities in Life Expectancy Among US Counties, 1980 to 2014". JAMA Internal Medicine. 177: 1003–1011. doi:10.1001/jamainternmed.2017.0918. PMC   5543324 . PMID   28492829 . Retrieved 9 May 2017.
  22. Jefferson County, Colorado, borders Boulder County, the City and County of Broomfield, Adams County, the City and County of Denver, Arapahoe County, Douglas County, Teller County, Park County, Clear Creek County, and Gilpin County, Colorado.
  23. Delta County, Colorado, borders Gunnison County, Montrose County, and Mesa County, Colorado. The City and County of Denver, Colorado, borders Adams County, Arapahoe County, and Jefferson County, Colorado.
  24. "Mean County Elevation Lists". County Highpointers. Retrieved May 2, 2011.

Coordinates: 38°59′50″N105°32′52″W / 38.9972°N 105.5478°W / 38.9972; -105.5478 (State of Colorado)