The county lies immediately adjacent to the Williston Micropolitan Statistical Area, although the Census Bureau does not include McKenzie County in that grouping.
History
The Dakota Territory legislature created the county on March 9, 1883, with areas partitioned from Howard County (now extinct). The county was named for Alexander McKenzie, a territorial political figure who was later disgraced for corruption.[4] The county was not organized at that time, and was not attached to another county for administrative or judicial purposes. The county's boundary was altered in 1885, and on March 2, 1891, the state legislature authorized the dissolution of the county, assigning its territories to Billings and Stark counties. However, this directive was not implemented, and McKenzie continued as a defined county until November 3, 1896, when another act was passed to dissolve the county and assign its territories to Billings County. This act was challenged in the courts, and on May 24, 1901, the state Supreme Court held that the county was to continue in existence.
On March 10, 1903, the county was attached to Stark County for administrative purposes. On March 16, 1905, McKenzie gained the territories of Allred and Wallace counties as those counties were administratively dissolved. On April 20, 1905, the McKenzie County government was organized, and its previous attachment to Stark was terminated.
The first county seat was Alexander. In 1907 the seat was moved to Schafer, and in 1941 it was moved to the present location, Watford City.[5][6]
Between the 2010 and 2020 censuses, McKenzie County was the fastest growing county in the United States, growing by 131.2% from 6,360 to 14,704 inhabitants, largely due to the Bakken Formationoil boom.[7][8]
Geography
McKenzie County lies on the west line of North Dakota. Its west boundary line abuts the east boundary line of the state of Montana. The Missouri River flows easterly along the western portion of the county's north boundary line, and the enlargement of the Missouri as it discharges into Lake Sakakawea forms the eastern portion of the county's north and northeastern boundary line. The Yellowstone River flows into the northwestern corner of the county from Montana, and discharges into the Missouri at the county's northern boundary line. The Little Missouri River flows northeasterly through the county's lower portion, on its way to discharge into Lake Sakakawea, east of the county's east boundary line. The county terrain consists of semi-arid rolling hills, carved by river valleys and drainages. The area is partially devoted to agriculture.[9] The terrain slopes to the east and north, with its highest point on its south boundary line, at 2,684ft (818m) ASL.[10]
According to the United States Census Bureau, the county has a total area of 2,860.566 square miles (7,408.83km2), of which 2,760.133 square miles (7,148.71km2) is land and 100.433 square miles (260.12km2) (3.51%) is water.[11] It is the 1st largest county in North Dakota by total area.[12]
The McKenzie County landscape features a wide diversity of physical features, ranging from sugarbeet fields bordering the Missouri River at the northwest corner of the county to rugged badlands near the Little Missouri River in the south, where Theodore Roosevelt National Park and the Little Missouri National Grassland are located. Between the two rivers is a large area of prairie, ranging from gentle rolling terrain to rocky, rugged pastures. The southeast corner of the county, bordering on the Little Missouri badlands of neighboring Dunn County, is abundant in wildlife, quaking aspen groves, and bur oak groves, interspersed in places with western red cedar on the north-facing slopes of the badlands.
The southwestern corner counties of North Dakota (Adams, Billings, Bowman, Golden Valley, Grant, Hettinger, Slope, Stark) observe Mountain Time. The counties of McKenzie, Dunn, and Sioux are split between Mountain and Central Time.
U.S. Decennial Census[14] 1790–1960[15] 1900–1990[16] 1990–2000[17] 2010–2020[2]
As of the fourth quarter of 2024, the median home value in McKenzie County was $378,579.[18]
As of the 2023 American Community Survey, there are 5,910 estimated households in McKenzie County with an average of 2.37 persons per household. The county has a median household income of $88,289. Approximately 8.1% of the county's population lives at or below the poverty line. McKenzie County has an estimated 69.8% employment rate, with 22.8% of the population holding a bachelor's degree or higher and 92.3% holding a high school diploma.[2]
The top five reported ancestries (people were allowed to report up to two ancestries, thus the figures will generally add to more than 100%) were English (91.0%), Spanish (4.9%), Indo-European (1.2%), Asian and Pacific Islander (0.9%), and Other (2.0%).
The median age in the county was 31.2 years.
McKenzie County, North Dakota – racial and ethnic composition Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos may be of any race.
As of the 2023 estimate, there were 14,252 people and 5,910 households residing in the county. There were 7,841 housing units at an average density of 2.84 per square mile (1.1/km2). The racial makeup of the county was 84.5% White (74.0% NH White), 2.2% African American, 8.3% Native American, 1.2% Asian, 0.1% Pacific Islander, _% from some other races and 3.7% from two or more races. Hispanic or Latino people of any race were 13.0% of the population.[24]
2020 census
As of the 2020 census, there were 14,704 people, 5,416 households, and 3,519 families residing in the county.[25] The population density was 5.3 inhabitants per square mile (2.0/km2). There were 7,661 housing units at an average density of 2.78 per square mile (1.1/km2). The racial makeup of the county was 72.35% White, 1.48% African American, 12.88% Native American, 1.16% Asian, 0.03% Pacific Islander, 4.82% from some other races and 7.27% from two or more races. Hispanic or Latino people of any race were 10.42% of the population.[26]
2010 census
As of the 2010 census, there were 6,360 people, 2,410 households, and 1,682 families residing in the county. The population density was 2.3 inhabitants per square mile (0.9/km2). There were 3,090 housing units at an average density of 1.12 per square mile (0.4/km2). The racial makeup of the county was 75.35% White, 0.13% African American, 22.20% Native American, 0.30% Asian, 0.03% Pacific Islander, 0.42% from some other races and 1.57% from two or more races. Hispanic or Latino people of any race were 2.19% of the population.
There were 2,410 households, 33.7% had children under the age of 18 living with them, 52.7% were married couples living together, 10.2% had a female householder with no husband present, 30.2% were non-families, and 25.3% of all households were made up of individuals. The average household size was 2.58 and the average family size was 3.06. The median age was 38.0 years.
The median income for a household in the county was $48,480 and the median income for a family was $58,906. Males had a median income of $42,803 versus $33,056 for females. The per capita income for the county was $27,605. About 6.7% of families and 10.0% of the population were below the poverty line, including 12.8% of those under age 18 and 10.0% of those age 65 or over.
Elk, Poe, and Wilbur townships merged January 1, 2002 to form Tri Township.[27]
Politics
McKenzie County voters have traditionally voted Republican. In only one national election since 1948 has the county selected the Democratic Party candidate (as of 2024).
United States presidential election results for McKenzie County, North Dakota[28][29]
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