Founded in February 2, 1865, Chouteau County is one of 56 counties in the state of Montana. Historically, Chouteau County was one of the 9 original counties. The city of Fort Benton is the county seat. With FIPS code of 15, Chouteau County has a population of 5,916 and area of 3,973 square miles (10,290 km2).
List of all cities in Chouteau County, MT alphabetically
| City/Town | Postal Code | Area Code |
| Big Sandy, MT | 59520 | 406 |
| Carter, MT | 59420 | 406 |
| Carter, MT | 59440 | 406 |
| Floweree, MT | 59440 | 406 |
| Fort Benton, MT | 59442 | 406 |
| Geraldine, MT | 59446 | 406 |
| Highwood, MT | 59450 | 406 |
| Loma, MT | 59460 | 406 |
| Shonkin, MT | 59450 | 406 |
| Square Butte, MT | 59446 | 406 |