Lake County, South Dakota

Geography

According to the U.S. Census Bureau, the county has a total area of 575 square miles (1,490 km²), of which 563 square miles (1,460 km²) is land and 12 square miles (31 km²) (2.1%) is water.

Major highways

Adjacent counties

2000 census

As of the census of 2000, there were 11,276 people, 4,372 households, and 2,828 families residing in the county. The population density was 20 people per square mile (8/km²). There were 5,282 housing units at an average density of 9 per square mile (4/km²). The racial makeup of the county was 97.76% White, 0.20% Black or African American, 0.66% Native American, 0.54% Asian, 0.01% Pacific Islander, 0.33% from other races, and 0.51% from two or more races. 0.79% of the population were Hispanic or Latino of any race.

There were 4,372 households out of which 29.80% had children under the age of 18 living with them, 55.90% were married couples living together, 5.90% had a female householder with no husband present, and 35.30% were non-families. 29.20% of all households were made up of individuals and 13.30% had someone living alone who was 65 years of age or older. The average household size was 2.41 and the average family size was 3.00.

In the county, the population was spread out with 23.70% under the age of 18, 15.00% from 18 to 24, 23.40% from 25 to 44, 21.40% from 45 to 64, and 16.30% who were 65 years of age or older. The median age was 36 years. For every 100 females there were 99.80 males. For every 100 females age 18 and over, there were 99.50 males.

The median income for a household in the county was $34,087, and the median income for a family was $43,750. Males had a median income of $28,994 versus $21,084 for females. The per capita income for the county was $16,446. About 5.40% of families and 9.70% of the population were below the poverty line, including 8.60% of those under age 18 and 8.60% of those age 65 or over.

2010 census

As of the 2010 United States Census, there were 11,200 people, 4,483 households, and 2,814 families residing in the county. The population density was 19.9 inhabitants per square mile (7.7/km²). There were 5,559 housing units at an average density of 9.9 per square mile (3.8/km²). The racial makeup of the county was 96.2% white, 0.7% Asian, 0.7% American Indian, 0.5% black or African American, 0.8% from other races, and 1.1% from two or more races. Those of Hispanic or Latino origin made up 1.6% of the population. In terms of ancestry, 50.7% were German, 20.6% were Norwegian, 12.4% were Irish, 6.6% were English, 6.2% were Dutch, 5.0% were Danish, and 5.0% were American.

Of the 4,483 households, 26.7% had children under the age of 18 living with them, 53.0% were married couples living together, 6.8% had a female householder with no husband present, 37.2% were non-families, and 30.9% of all households were made up of individuals. The average household size was 2.30 and the average family size was 2.88. The median age was 39.9 years.

The median income for a household in the county was $45,606 and the median income for a family was $57,753. Males had a median income of $36,370 versus $25,898 for females. The per capita income for the county was $22,447. About 6.5% of families and 12.1% of the population were below the poverty line, including 12.8% of those under age 18 and 8.8% of those age 65 or over.

City

Towns

Village

Census-designated places

Other unincorporated communities

Townships

The county is divided into sixteen townships:

Historical townsite