Petroleum County, Montana
Petroleum County | |
|---|---|
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 after | 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 (2024) | 525 |
| • Density | 0.30/sq mi (0.11/km2) |
| Time zone | UTC−7 (Mountain) |
| • Summer (DST) | UTC−6 (MDT) |
| Congressional district | 2nd |
| Website | petroleumcountymt |
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Petroleum County is a county in the U.S. state of Montana. As of the 2020 census, the population was 496, making it the least populous county in Montana and the eighth-least populous in the United States. Its county seat is Winnett. The county's area was partitioned from Fergus County in 1925 to become the last of Montana's 56 counties to be organized.