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Blaine County, Montana facts for kids

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Blaine County
Blaine County Courthouse in Chinook
Blaine County Courthouse in Chinook
Map of Montana highlighting Blaine County
Location within the U.S. state of Montana
Map of the United States highlighting Montana
Montana's location within the U.S.
Country  United States
State  Montana
Founded 1912
Named for James G. Blaine
Seat Chinook
Largest city Chinook
 • Total 4,239 sq mi (10,980 km2)
 • Land 4,228 sq mi (10,950 km2)
 • Water 11 sq mi (30 km2)  0.3%
 • Total 7,044
 • Density 1.66171/sq mi (0.64159/km2)
Time zone UTC−7 (Mountain)
 • Summer (DST) UTC−6 (MDT)
Congressional district At-large
  • Montana county number 24

Blaine County is a county in the U.S. state of Montana. As of the 2020 United States Census, the population was 7,044. Its county seat is Chinook. The county was named for James G. Blaine, former United States Secretary of State. It is on the north line of the state, and thus shares the southern border of Canada opposite Saskatchewan.


In 1912 Blaine, Phillips and Hill counties withdrew from Chouteau County to form their own counties. The original boundary of Blaine County included a portion of land in the west that is included in Phillips County.


According to the U.S. Census Bureau, the county has a total area of 4,239 square miles (10,980 km2), of which 4,228 square miles (10,950 km2) is land and 11 square miles (28 km2) (0.3%) is water.

The majority of Fort Belknap Indian Reservation is located in the southeastern part of the county.

Features of the area include the Milk River, Bears Paw Mountains, and the Little Rocky Mountains.

Adjacent counties and rural municipalities

National protected areas


Historical population
Census Pop.
1920 9,057
1930 9,006 −0.6%
1940 9,566 6.2%
1950 8,516 −11.0%
1960 8,091 −5.0%
1970 6,727 −16.9%
1980 6,999 4.0%
1990 6,728 −3.9%
2000 7,009 4.2%
2010 6,491 −7.4%
2020 7,044 8.5%
US Decennial Census
1790-1960 1900-1990
1990-2000 2010-2020

2010 census

As of the 2010 United States Census, there were 6,491 people, 2,357 households, and 1,604 families living in the county. The population density was 1.5 inhabitants per square mile (0.58/km2). There were 2,843 housing units at an average density of 0.7 per square mile (0.27/km2). The racial makeup of the county was 49.4% American Indian, 48.2% white, 0.1% black or African American, 0.1% Asian, 0.2% from other races, and 2.0% from two or more races. Those of Hispanic or Latino origin made up 1.8% of the population. In terms of ancestry, 23.0% were German, 9.2% were Norwegian, 6.6% were Irish, 5.7% were English, and 2.0% were American.

Of the 2,357 households, 39.2% had children under the age of 18 living with them, 45.6% were married couples living together, 16.0% had a female householder with no husband present, 31.9% were non-families, and 28.7% of all households were made up of individuals. The average household size was 2.66 and the average family size was 3.28. The median age was 35.1 years.

The median income for a household in the county was $37,034 and the median income for a family was $40,890. Males had a median income of $32,320 versus $28,986 for females. The per capita income for the county was $16,813. About 23.6% of families and 29.0% of the population were below the poverty line, including 44.6% of those under age 18 and 10.6% of those age 65 or over.



Census-designated places

Unincorporated communities


The main industry in Blaine County is agriculture. The main employers on the Reservation are the Gros Ventre and Assiniboine tribes.


Fort Belknap College is located on the Fort Belknap Indian Reservation. Public high schools in the county include Harlem High School in Harlem, Chinook High School in Chinook, and Turner High School in Turner.

See also

Kids robot.svg In Spanish: Condado de Blaine (Montana) para niños

National Hispanic Heritage Month on Kiddle
Eminent Hispanic scientists
Walter Alvarez
Joel Salinas
Jaime Escalante
Claudia Benitez-Nelson
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