Phillips County is a county found in the U.S. state of Montana. As of the 2020 United States Census, there were 4,217 people.[1] Its county seat is Malta.[2] Before February 5, 1915, Phillips County was part of Blaine County, Montana, and before 1912 both were part of Chouteau County, Montana.[3] It was named for rancher and state senator Benjamin D. Phillips.
Its northern boundary is the Canada–United States border with Saskatchewan. The Missouri River defines its southern boundary.
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