Oglala Lakota County

Also known as Shannon County, South Dakota, Shannon County, Oglala Lakota County, South Dakota, Oglala Lakota County, SD

county in South Dakota, United States

Key facts

Country: United States
State: South Dakota
Founded: January 11, 1875
Named after: Oglala Lakota people
Seat: None ( de jure ), Hot Springs ( de facto )
Largest community: Pine Ridge
Total: 2,096.352 sq mi (5,429.53 km )
Land: 2,093.601 sq mi (5,422.40 km )
Water: 2.751 sq mi (7.13 km ) 0.1%
Estimate 2025: 13,338
Time zone: UTC−7 ( Mountain )
Summer dst: UTC−6 ( MDT )
Congressional district

Article

Oglala Lakota County (known as Shannon County until May 2015) is a county in southwestern South Dakota, United States. As of the 2020 census, the population was 13,672. Oglala Lakota County does not have a functioning county seat; Hot Springs in neighboring Fall River County serves as its administrative center. The county was created as a part of the Dakota Territory in 1875, although it remains unorganized. Its largest community is Pine Ridge. Oglala Lakota is the only dry county in South Dakota.

The county lies entirely within the Pine Ridge Indian Reservation and contains part of Badlands National Park. It is one of five South Dakota counties entirely on an Indian reservation.