Marshall County | |
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![]() Marshall County Courthouse in Britton | |
![]() Location within the U.S. state of South Dakota | |
![]() South Dakota's location within the U.S. | |
Coordinates: 45°46′N 97°36′W / 45.76°N 97.6°W | |
Country | ![]() |
State | ![]() |
Founded | 1885 |
Named for | Marshall Vincent |
Seat | Britton |
Largest city | Britton |
Area | |
• Total | 886 sq mi (2,290 km2) |
• Land | 838 sq mi (2,170 km2) |
• Water | 48 sq mi (120 km2) 5.4% |
Population (2020) | |
• Total | 4,306 |
• Estimate (2023) | 4,390 ![]() |
• Density | 4.9/sq mi (1.9/km2) |
Time zone | UTC−6 (Central) |
• Summer (DST) | UTC−5 (CDT) |
Congressional district | At-large |
Website | marshall |
Marshall County is a county in the U.S. state of South Dakota. As of the 2020 census, the population was 4,306.[1] Its county seat is Britton.[2] The county was created on May 2, 1885,[3] and was named for Marshall Vincent, who homesteaded near Andover, South Dakota.[4]