Custer County

Custer County is an administrative county in southeastern Montana with Miles City serving as its county seat. The region includes several smaller unincorporated communities and is connected by major highways including Interstate 94.

The territory was established in 1865 as Big Horn County and renamed in 1877 to honor Lieutenant Colonel George Armstrong Custer. This change marked a significant shift in how the region identified itself administratively.

Ranching and farming shape daily life in the area, with Miles City serving as the commercial and social hub where locals gather for business and community events. The landscape and settlements reflect generations of cattle-raising traditions.

Travel via Interstate 94, US Highway 12, or US Highway 212 to move between the county's communities. Miles City is where you will find government offices and essential services for visitors.

The county opened a modern detention center in 2015 that replaced a facility serving the community for over a century. This newer structure represents a significant infrastructure upgrade for the region.

Location: Montana

Inception: 1865

Capital city: Miles City

Shares border with: Prairie County, Powder River County, Fallon County, Carter County, Garfield County, Rosebud County

Website: https://custercountymt.gov

GPS coordinates: 46.27000,-105.58000

Latest update: December 10, 2025 15:55