Bon Homme County (pronounced BAHN’-uhm) is a county in the U.S. state of South Dakota. As of the 2010 United States Census, the population was 7,070. Its county seat is Tyndall.
Bon Homme County lies on the south line of South Dakota. Its south boundary line abuts the north boundary line of the state of Nebraska (across the Missouri River). The west boundary line of the county is roughly defined by Choteau Creek, which flows southward to discharge in the river. The county terrain consists of low rolling hills, sloping to the river valley; most of the area is devoted to agriculture. The terrain’s highest point is the county’s NW corner, at 1,883′ (574m) ASL.
The county has a total area of 582 square miles (1,510 km), of which 564 square miles (1,460 km) is land and 18 square miles (47 km) (3.1%) is water.
As of the 2000 United States Census, there were 7,260 people, 2,635 households, and 1,786 families in the county. The population density was 13 people per square mile (5/km²). There were 3,007 housing units at an average density of 5 per square mile (2/km²). The racial makeup of the county was 95.51% White, 0.62% Black or African American, 2.99% Native American, 0.08% Asian, 0.18% from other races, and 0.62% from two or more races. 0.58% of the population were Hispanic or Latino of any race. 41.3% were of German, 19.8% Czech and 9.9% Dutch ancestry.
There were 2,635 households out of which 28.70% had children under the age of 18 living with them, 59.80% were married couples living together, 5.10% had a female householder with no husband present, and 32.20% were non-families. 29.50% of all households were made up of individuals and 16.50% had someone living alone who was 65 years of age or older. The average household size was 2.38 and the average family size was 2.95.
The county population contained 23.10% under the age of 18, 7.60% from 18 to 24, 26.80% from 25 to 44, 21.70% from 45 to 64, and 20.80% who were 65 years of age or older. The median age was 40 years. For every 100 females there were 123.00 males. For every 100 females age 18 and over, there were 126.40 males.
The median income for a household in the county was $30,644, and the median income for a family was $36,924. Males had a median income of $24,303 versus $20,307 for females. The per capita income for the county was $13,892. About 9.40% of families and 12.90% of the population were below the poverty line, including 16.20% of those under age 18 and 13.80% of those age 65 or over.
As of the 2010 United States Census, there were 7,070 people, 2,457 households, and 1,572 families in the county. The population density was 12.5 inhabitants per square mile (4.8/km). There were 2,931 housing units at an average density of 5.2 per square mile (2.0/km). The racial makeup of the county was 89.8% white, 7.1% American Indian, 1.0% black or African American, 0.1% Asian, 0.6% from other races, and 1.4% from two or more races. Those of Hispanic or Latino origin made up 1.8% of the population. In terms of ancestry, 48.6% were German, 20.6% were Czech, 11.7% were Dutch, 7.8% were Irish, 6.1% were Norwegian, and 1.7% were American.
Of the 2,457 households, 25.6% had children under the age of 18 living with them, 55.7% were married couples living together, 5.5% had a female householder with no husband present, 36.0% were non-families, and 32.8% of all households were made up of individuals. The average household size was 2.24 and the average family size was 2.84. The median age was 43.1 years.
The median income for a household in the county was $41,107 and the median income for a family was $51,910. Males had a median income of $34,478 versus $28,464 for females. The per capita income for the county was $20,074. About 10.1% of families and 12.4% of the population were below the poverty line, including 16.7% of those under age 18 and 12.6% of those age 65 or over.