Petroleum County | |
|---|---|
.jpg) Petroleum County Courthouse in Winnett | |
 Location within the U.S. state of Montana | |
 Montana's location within the U.S. | |
| Coordinates: 47°07′N 108°16′W / 47.11°N 108.26°W | |
| Country |  United States |
| State |  Montana |
| Founded | February 25, 1925 |
| Named for | Petroleum fields |
| Seat | Winnett |
| Largest town | Winnett |
| Area | |
• Total | 1,674 sq mi (4,340 km2) |
| • Land | 1,655 sq mi (4,290 km2) |
| • Water | 19 sq mi (50 km2) 1.1% |
| Population (2020) | |
• Total | 496 |
• Estimate (2022) | 524  |
| • Density | 0.30/sq mi (0.11/km2) |
| Time zone | UTC−7 (Mountain) |
| • Summer (DST) | UTC−6 (MDT) |
| Congressional district | 2nd |
| Website | petroleumcountymt |
| |
Petroleum County is a county in the U.S. state of Montana. As of the 2020 census, the population was 496,[1] making it the least populous county in Montana and the eighth-least populous in the United States.[2] Its county seat is Winnett.[3] The county's area was partitioned from Fergus County in 1925 to become the last of Montana's 56 counties to be organized.[4][5]
- ^ "State & County QuickFacts". United States Census Bureau. Retrieved April 5, 2023.
- ^ "Top 10: Least Populous Counties, During the Period of 2005-2009". PolicyMap. February 28, 2011. Retrieved July 7, 2013.
- ^ "Find a County". National Association of Counties. Retrieved June 7, 2011.
- ^ Ellie Arguimbau; Ellen Baumler; Charlene L. Porsild; Brian Shovers (2009). Montana Place Names: From Alzada to Zortman. Montana Historical Society. p. 204. ISBN 978-0-9759196-1-3.
- ^ Soils Industry, pp. 1-2