Campbell County | |
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![]() Location within the U.S. state of South Dakota | |
![]() South Dakota's location within the U.S. | |
Coordinates: 45°46′N 100°03′W / 45.76°N 100.05°W | |
Country | ![]() |
State | ![]() |
Founded | 1873 (created) 1884 (organized) |
Seat | Mound City |
Largest city | Herreid |
Area | |
• Total | 771 sq mi (2,000 km2) |
• Land | 734 sq mi (1,900 km2) |
• Water | 37 sq mi (100 km2) 4.8% |
Population (2020) | |
• Total | 1,377 |
• Estimate (2023) | 1,340 ![]() |
• Density | 1.8/sq mi (0.69/km2) |
Time zone | UTC−6 (Central) |
• Summer (DST) | UTC−5 (CDT) |
Congressional district | At-large |
Campbell County is a county in the U.S. state of South Dakota. As of the 2020 census, the population was 1,377,[1] making it the fourth-least populous county in South Dakota. Its county seat is Mound City.[2] The county was created in 1873 and organized in 1884.[3] It was named for Norman B. Campbell, a Dakota Territory legislator in 1873 and son of General Charles T. Campbell.[4]