Prairie County | |
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Downtown Terry, Montana during a typical snowy day. | |
![]() Location within the U.S. state of Montana | |
![]() Montana's location within the U.S. | |
Coordinates: 46°51′N 105°22′W / 46.85°N 105.37°W | |
Country | ![]() |
State | ![]() |
Founded | February 5, 1915 |
Named for | Prairie landscape |
Seat | Terry |
Largest town | Terry |
Area | |
• Total | 1,743 sq mi (4,510 km2) |
• Land | 1,737 sq mi (4,500 km2) |
• Water | 5.8 sq mi (15 km2) 0.3% |
Population (2020) | |
• Total | 1,088 |
• Estimate (2022) | 1,107 ![]() |
• Density | 0.6/sq mi (0.2/km2) |
Time zone | UTC−7 (Mountain) |
• Summer (DST) | UTC−6 (MDT) |
Congressional district | 2nd |
Website | visitterrymt.com (Terry Chamber of Commerce) |
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Prairie County is a county in the U.S. state of Montana. As of the 2020 census, the population was 1,088,[1] making it the fifth-least populous county in Montana.[citation needed] Its county seat is Terry.[2] Prairie County was created by the Montana Legislature in 1915 out of parts of Custer, Dawson, and Fallon Counties. The name was selected in a contest and reflects the predominant landscape of the region.[3]
The county was the site of the 1938 Custer Creek train wreck that killed 47 people and injured 75.