In 2023, Lake County, SD had a population of 11.1k people with a median age of 43.7 and a median household income of $73,792. Between 2022 and 2023 the population of Lake County, SD declined from 11,207 to 11,052, a −1.38% decrease and its median household income declined from $74,884 to $73,792, a −1.46% decrease.
The 5 largest ethnic groups in Lake County, SD are White (Non-Hispanic) (89.7%), White (Hispanic) (2.35%), American Indian & Alaska Native (Non-Hispanic) (2.34%), Other (Hispanic) (1.84%), and Two+ (Non-Hispanic) (1.65%).
None of the households in Lake County, SD reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.
98.2% of the residents in Lake County, SD are U.S. citizens.
In 2023, the median property value in Lake County, SD was $231,000, and the homeownership rate was 71.4%.
Most people in Lake County, SD drove alone to work, and the average commute time was 15.7 minutes. The average car ownership in Lake County, SD was 2 cars per household.
Lake County, SD borders Brookings County, SD, Kingsbury County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, and Moody County, SD.