Mildred is an unincorporated community in Prairie County, Montana, United States. Mildred is located along a former Chicago, Milwaukee, St. Paul and Pacific Railroad line 18.5 miles (29.8 km) east-southeast of Terry. It was platted in 1908 and the first post office was established with Edward Harper as postmaster. The town was named for the daughter of a Milwaulkee Railroad official.
Mildred was on the Yellowstone Trail and lost population once the highway was built.
Climate
According to the Köppen Climate Classification system, Mildred has a cold semi-arid climate, abbreviated "BSk" on climate maps. The hottest temperature recorded in Mildred was 113 °F (45.0 °C) on July 20, 1960 and July 13, 2026, while the coldest temperature recorded was −50 °F (−45.6 °C) on February 16, 1936.