Jefferson County | |
---|---|
Coordinates: 46°11′N112°07′W / 46.18°N 112.11°W | |
Country | United States |
State | Montana |
Founded | February 2, 1865 [1] |
Named for | Thomas Jefferson |
Seat | Boulder |
Largest town | Clancy |
Area | |
• Total | 1,659 sq mi (4,300 km2) |
• Land | 1,656 sq mi (4,290 km2) |
• Water | 2.6 sq mi (7 km2) 0.2% |
Population (2020) | |
• Total | 12,085 |
• Estimate (2022) | 12,826 |
• Density | 7/sq mi (3/km2) |
Time zone | UTC−7 (Mountain) |
• Summer (DST) | UTC−6 (MDT) |
Congressional district | 2nd |
Website | www |
|
Jefferson County is a county in Montana, United States. As of the 2020 census, the population was 12,085. [2] Its county seat is Boulder. [3] The county was created in 1865 [4] and named for President Thomas Jefferson. [5]
Jefferson County is part of the Helena, MT Micropolitan Statistical Area.
According to the United States Census Bureau, the county has a total area of 1,659 square miles (4,300 km2), of which 1,656 square miles (4,290 km2) is land and 2.6 square miles (6.7 km2) (0.2%) is water. [6]
Year | Republican | Democratic | Third party | |||
---|---|---|---|---|---|---|
No. | % | No. | % | No. | % | |
2020 | 5,345 | 65.57% | 2,625 | 32.20% | 181 | 2.22% |
2016 | 4,177 | 62.21% | 1,998 | 29.76% | 539 | 8.03% |
2012 | 4,055 | 62.18% | 2,272 | 34.84% | 194 | 2.98% |
2008 | 3,538 | 55.80% | 2,582 | 40.72% | 221 | 3.49% |
2004 | 3,844 | 65.51% | 1,881 | 32.06% | 143 | 2.44% |
2000 | 3,308 | 64.07% | 1,513 | 29.30% | 342 | 6.62% |
1996 | 2,248 | 46.82% | 1,775 | 36.97% | 778 | 16.20% |
1992 | 1,541 | 36.47% | 1,415 | 33.49% | 1,269 | 30.04% |
1988 | 2,007 | 52.31% | 1,746 | 45.50% | 84 | 2.19% |
1984 | 2,226 | 61.53% | 1,324 | 36.59% | 68 | 1.88% |
1980 | 1,841 | 57.12% | 1,055 | 32.73% | 327 | 10.15% |
1976 | 1,387 | 52.26% | 1,210 | 45.59% | 57 | 2.15% |
1972 | 1,281 | 56.06% | 904 | 39.56% | 100 | 4.38% |
1968 | 798 | 45.06% | 820 | 46.30% | 153 | 8.64% |
1964 | 662 | 40.59% | 967 | 59.29% | 2 | 0.12% |
1960 | 817 | 51.38% | 769 | 48.36% | 4 | 0.25% |
1956 | 1,049 | 61.38% | 660 | 38.62% | 0 | 0.00% |
1952 | 1,084 | 60.76% | 687 | 38.51% | 13 | 0.73% |
1948 | 750 | 45.62% | 836 | 50.85% | 58 | 3.53% |
1944 | 797 | 49.72% | 803 | 50.09% | 3 | 0.19% |
1940 | 830 | 39.58% | 1,259 | 60.04% | 8 | 0.38% |
1936 | 573 | 27.78% | 1,409 | 68.30% | 81 | 3.93% |
1932 | 784 | 37.09% | 1,246 | 58.94% | 84 | 3.97% |
1928 | 1,013 | 56.97% | 751 | 42.24% | 14 | 0.79% |
1924 | 648 | 36.49% | 434 | 24.44% | 694 | 39.08% |
1920 | 969 | 54.47% | 688 | 38.67% | 122 | 6.86% |
1916 | 712 | 36.63% | 1,124 | 57.82% | 108 | 5.56% |
1912 | 239 | 20.03% | 479 | 40.15% | 475 | 39.82% |
1908 | 546 | 39.22% | 714 | 51.29% | 132 | 9.48% |
1904 | 663 | 45.54% | 580 | 39.84% | 213 | 14.63% |
Census | Pop. | Note | %± |
---|---|---|---|
1870 | 1,531 | — | |
1880 | 2,464 | 60.9% | |
1890 | 6,026 | 144.6% | |
1900 | 5,330 | −11.5% | |
1910 | 5,601 | 5.1% | |
1920 | 5,203 | −7.1% | |
1930 | 4,133 | −20.6% | |
1940 | 4,664 | 12.8% | |
1950 | 4,014 | −13.9% | |
1960 | 4,297 | 7.1% | |
1970 | 5,238 | 21.9% | |
1980 | 7,029 | 34.2% | |
1990 | 7,939 | 12.9% | |
2000 | 10,049 | 26.6% | |
2010 | 11,406 | 13.5% | |
2020 | 12,085 | 6.0% | |
2022 (est.) | 12,826 | [8] | 6.1% |
U.S. Decennial Census [9] 1790–1960, [10] 1900–1990, [11] 1990–2000, [12] 2010–2020 [2] |
As of the 2020 census, there were 12,085 people living in the county. [13]
As of the 2010 census, there were 11,406 people, 4,512 households, and 3,301 families residing in the county. The population density was 6.9 inhabitants per square mile (2.7/km2). There were 5,055 housing units at an average density of 3.1 per square mile (1.2/km2). The racial makeup of the county was 95.5% white, 1.4% American Indian, 0.4% Asian, 0.1% black or African American, 0.4% from other races, and 2.2% from two or more races. Those of Hispanic or Latino origin made up 2.0% of the population. In terms of ancestry, 31.3% were German, 19.1% were Irish, 17.2% were English, 10.8% were Norwegian, and 4.2% were American.
Of the 4,512 households, 28.8% had children under the age of 18 living with them, 63.7% were married couples living together, 5.4% had a female householder with no husband present, 26.8% were non-families, and 22.6% of all households were made up of individuals. The average household size was 2.48 and the average family size was 2.90. The median age was 46.2 years.
The median income for a household in the county was $56,695 and the median income for a family was $67,195. Males had a median income of $50,978 versus $34,148 for females. The per capita income for the county was $26,437. About 2.7% of families and 12.8% of the population were below the poverty line, including 5.1% of those under age 18 and 8.6% of those age 65 or over.
Wheatland County is a county in the U.S. state of Montana. As of the 2020 census, the population was 2,069. Its county seat is Harlowton. Wheatland County was established on February 22, 1917, with areas partitioned from Meagher and Sweet Grass counties. It was named for the abundant wheat-growing areas across the center portion of the new county's area.
Valley County is a county in the U.S. state of Montana. Valley County was created in 1893 with area partitioned from Dawson County. As of the 2020 census, the population was 7,578. Its county seat is Glasgow. It is located on the Canada–United States border with Saskatchewan.
Toole County is a county in the northern portion of the U.S. state of Montana. As of the 2020 census, the population was 4,971. Its county seat is Shelby. The county was established in 1914 from parts of Hill County and Teton County and was named after Joseph Toole, the first and fourth governor of Montana. Its northern boundary is the Canada–United States border south of Alberta.
Silver Bow County is a county in the U.S. state of Montana. As of the 2020 census, the population was 35,133. Its county seat is Butte. In 1977, the city and county governments consolidated to form the single entity of Butte-Silver Bow. Additionally, the town of Walkerville is a separate municipality from Butte and is within the county.
Roosevelt County is a county in the U.S. state of Montana. As of the 2020 census, the population was 10,794. Its county seat is Wolf Point. Roosevelt County was created by the Montana Legislature in 1919 from a portion of Sheridan County. The name honors former president Theodore Roosevelt, who had died earlier that year.
Richland County is a county in the U.S. state of Montana. As of the 2020 census, the population was 11,491. Its county seat is Sidney.
Powell County is a county in the U.S. state of Montana. As of the 2020 census, the population was 6,946. Its county seat is Deer Lodge.
Park County is a county in the U.S. state of Montana. At the 2020 census, the population was 17,191. Its county seat is Livingston. A small part of Yellowstone National Park is in the southern part of the county.
Mineral County is a county located in the U.S. state of Montana. As of the 2020 census, the population was 4,535. Its county seat is Superior.
Meagher County is a county located in the U.S. state of Montana. As of the 2020 census, the population was 1,927. Its county seat is White Sulphur Springs.
Madison County is a county in the U.S. state of Montana. As of the 2020 census, the population was 8,623. Its county seat is Virginia City. The county was founded in 1865; at the time it was part of the Montana Territory.
Lewis and Clark County is a county located in the U.S. state of Montana. As of the 2020 census, the population was 70,973. Its county seat is Helena, the state capital. The numerical designation for Lewis and Clark County is 5. The county was established on June 2, 1865, as one of the nine original counties of the Territory of Montana named Edgerton County in honor of Sidney Edgerton, first Governor of the Territory of Montana, and was renamed Lewis and Clark County on March 1, 1868, in honor of explorers Meriwether Lewis and William Clark.
Judith Basin County is a county in the U.S. state of Montana. As of the 2020 census, the population was 2,023. Its county seat is the town of Stanford.
Granite County is a county located in the U.S. state of Montana. As of the 2020 census, the population was 3,309. Its county seat is Philipsburg. The county was founded in 1893, and was named for a mountain which contains the Granite Mountain silver mine.
Garfield County is a county located in the U.S. state of Montana. As of the 2020 census, the population was 1,173. Its county seat is Jordan.
Fergus County is a county in the U.S. state of Montana. As of the 2020 census, the population was 11,446. Its county seat is Lewistown. The county was founded in 1885 and named for James Fergus, a Montana politician who was instrumental in creating the county.
Fallon County is a county located in the U.S. state of Montana. As of the 2020 census, the population was 3,049. Its county seat is Baker. The county was created in 1913 from a portion of Custer County. It is named for Benjamin O'Fallon, a nephew of Captain William Clark and an Indian agent for the upper Missouri region from 1823 to 1827.
Daniels County is a county located in the U.S. state of Montana. As of the 2020 census, the population was 1,661. Its county seat is Scobey. It is on Montana's north border, and thus abuts the Canada–US border with Saskatchewan.
Chouteau County is a county located in the North-Central region of the U.S. state of Montana. As of the 2020 census, the population was 5,895. Its county seat is Fort Benton. The county was established in 1865 as one of the original nine counties of Montana, and named in 1882 after Pierre Chouteau Jr., a fur trader who established a trading post that became Fort Benton, which was once an important port on the Missouri River.
Broadwater County is a county in the U.S. state of Montana. As of the 2020 census, the population was 6,774. Its county seat is Townsend. The county was named for Charles Arthur Broadwater, a noted Montana railroad, real estate, and banking magnate.