Hill County is a county located in the U.S. state of Montana. As of the 2020 census, the population was 16,309. Its county seat is Havre. It lies along the United States border with Canada, abutting Alberta and Saskatchewan.

Havre is the county seat and largest city in Hill County, Montana, United States. Havre is nicknamed the crown jewel of the Hi-Line. It is said to be named after the city of Le Havre in France. As of the 2020 census the population was 9,362.