Phillips County is a county in the U.S. state of Montana. As of the 2020 census, the population was 4,217. Its county seat is Malta. Before February 5, 1915, Phillips County was part of Blaine County, and before 1912 both were part of Chouteau County. It was named for rancher and state senator Benjamin D. Phillips.

Malta is a city in, and the county seat of, Phillips County, Montana, United States, located at the intersection of U.S. Routes 2 and 191. The population was 1,860 at the 2020 census.