- Source: Custer County, Montana
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- Custer County, Montana
- Custer, Montana
- Miles City, Montana
- Custer County
- List of counties in Montana
- List of mountains in Custer County, Montana
- Prairie County, Montana
- Fort Custer (Montana)
- Interstate 94 in Montana
- Tongue River (Montana)
Custer County is a county located in the southeast part of the U.S. state of Montana. As of the 2020 U.S. census, the population was 11,867. Its county seat and largest town is Miles City. The county was established after the end of the American Civil War (1861-1865), on June 2, 1865, as one of the nine original counties of the new western federal Territory of Montana, which had been formed the previous May of 1864 by the United States Congress, with the approval of 16th President Abraham Lincoln (1809-1865, served 1861-1865). It was originally named Big Horn County of the old Montana Territory, and was renamed on February 16, 1877, in honor of Lieutenant Colonel George Armstrong Custer (1839-1876), commander of the famous 7th Cavalry Regiment of the United States Army, recently massacred and killed in the nearby Battle of the Little Bighorn, in the later portion of the American Indian Wars, the year before in June 1876.
Geography
According to the United States Census Bureau, the county has a total area of 3,793 square miles (9,820 km2), of which 3,783 square miles (9,800 km2) is land and 9.9 square miles (26 km2) (0.3%) is water.
= Climate
=According to the Köppen Climate Classification system, Custer County has a mostly cold semi-arid climate, abbreviated "BSk" on climate maps.
= Major highways
== Transit
=Jefferson Lines
= Adjacent counties
=Demographics
= 2020 census
=As of the 2020 census, there were 11,867 people living in the county.
= 2010 census
=As of the 2010 census, there were 11,699 people, 5,031 households, and 3,014 families living in the county. The population density was 3.1 inhabitants per square mile (1.2/km2). There were 5,560 housing units at an average density of 1.5 per square mile (0.58/km2). The racial makeup of the county was 95.5% white, 1.7% American Indian, 0.3% black or African American, 0.3% Asian, 0.1% Pacific islander, 0.5% from other races, and 1.6% from two or more races. Those of Hispanic or Latino origin made up 2.2% of the population. In terms of ancestry, 33.6% were German, 18.3% were Irish, 14.3% were American, 14.1% were Norwegian, and 10.6% were English.
Of the 5,031 households, 27.3% had children under the age of 18 living with them, 46.6% were married couples living together, 9.0% had a female householder with no husband present, 40.1% were non-families, and 34.3% of all households were made up of individuals. The average household size was 2.24 and the average family size was 2.88. The median age was 42.1 years.
The median income for a household in the county was $38,913 and the median income for a family was $49,011. Males had a median income of $37,535 versus $26,576 for females. The per capita income for the county was $21,676. About 12.4% of families and 15.7% of the population were below the poverty line, including 19.8% of those under age 18 and 14.6% of those age 65 or over.
Politics
Economy
Agriculture (dryland farming) and cattle raising provide the bulk of Custer County economy. Miles City serves as the center of commerce in an area extending for 100 miles in every direction. As of 2009 the county's largest employers were Holy Rosary Healthcare, Sanjel USA, Stockman Bank, and Walmart.
Communities
= City
=Miles City (county seat)
= Town
=Ismay
= Unincorporated communities
=See also
List of lakes in Custer County, Montana
List of mountains in Custer County, Montana
National Register of Historic Places listings in Custer County, Montana