Butte County is a county in the U.S. state of South Dakota. As of the 2010 United States Census, the population was 10,110. Its county seat is Belle Fourche. The county was established in the Dakota Territory on March 2, 1883, and given the descriptive name based on the French word for a hill.
Butte County lies on the west edge of South Dakota. Its northwestern boundary line abuts the eastern boundary line of the state of Montana, and its southwestern boundary line abuts the eastern boundary line of the state of Wyoming. The Butte County terrain consists of semi-arid rolling hills cut by drainages oriented NW-SE. A relatively small portion of the area is dedicated to agriculture, including the employment of center pivot irrigation. The terrain slopes to the southeast, and its highest point is on the western boundary line near the SW corner: 3,865′ (1178m) ASL.
The county has a total area of 2,266 square miles (5,870 km), of which 2,250 square miles (5,800 km) is land and 16 square miles (41 km) (0.7%) is water.
As of the 2000 census, there were 9,094 people, 3,516 households, and 2,468 families in the county. The population density was 4 people per square mile (2/km²). There were 4,059 housing units at an average density of 2 per square mile (1/km²). The racial makeup of the county was 95.52% White, 0.10% Black or African American, 1.65% Native American, 0.24% Asian, 1.09% from other races, and 1.40% from two or more races. 2.93% of the population were Hispanic or Latino of any race. 37.3% were of German, 10.0% Norwegian, 8.2% United States or American, 7.8% Irish and 7.7% English ancestry.
There were 3,516 households out of which 35.00% had children under the age of 18 living with them, 57.40% were married couples living together, 9.00% had a female householder with no husband present, and 29.80% were non-families. 25.60% of all households were made up of individuals and 11.90% had someone living alone who was 65 years of age or older. The average household size was 2.55 and the average family size was 3.07.
The county population contained 28.30% under the age of 18, 7.20% from 18 to 24, 26.00% from 25 to 44, 23.40% from 45 to 64, and 15.20% who were 65 years of age or older. The median age was 38 years. For every 100 females there were 96.90 males. For every 100 females age 18 and over, there were 93.20 males.
The median income for a household in the county was $29,040, and the median income for a family was $34,173. Males had a median income of $26,769 versus $15,758 for females. The per capita income for the county was $13,997. About 9.40% of families and 12.80% of the population were below the poverty line, including 17.40% of those under age 18 and 11.80% of those age 65 or over.
As of the 2010 United States Census, there were 10,110 people, 4,160 households, and 2,786 families in the county. The population density was 4.5 inhabitants per square mile (1.7/km). There were 4,621 housing units at an average density of 2.1 per square mile (0.81/km). The racial makeup of the county was 94.2% white, 1.9% American Indian, 0.2% black or African American, 0.2% Asian, 0.1% Pacific islander, 0.8% from other races, and 2.6% from two or more races. Those of Hispanic or Latino origin made up 3.0% of the population. In terms of ancestry, 40.9% were German, 16.6% were Irish, 15.7% were Norwegian, 10.4% were English, and 5.2% were American.
Of the 4,160 households, 30.5% had children under the age of 18 living with them, 52.3% were married couples living together, 9.8% had a female householder with no husband present, 33.0% were non-families, and 28.5% of all households were made up of individuals. The average household size was 2.40 and the average family size was 2.92. The median age was 41.1 years.
The median income for a household in the county was $39,041 and the median income for a family was $52,829. Males had a median income of $37,429 versus $25,273 for females. The per capita income for the county was $20,418. About 11.5% of families and 15.6% of the population were below the poverty line, including 25.0% of those under age 18 and 8.9% of those age 65 or over.
Butte County South Dakota neighborhoods include: Alcester, Baltic, Black Hawk, Box Elder, Brandon, Buffalo Ridge, Camp Crook, Canton, Caputa, Central City, Chancellor, Colton, Creighton, Crooks, Custer, Deadwood, Dell Rapids, Elkton, Ellsworth Afb, Garretson, Hartford, Hermosa, Hill City, Howes, Humboldt, Keystone, Lead, Ludlow, Montrose, Nemo, New Underwood, North Sioux City, Owanka, Parker, Quinn, Rapid City, Renner, Rowena, Saint Onge, Scenic, Sherman, Silver City, Sioux Falls, Spearfish, Sturgis, Valley Springs, Wall, Wanblee, Wasta, Whitewood