Boyes is an unincorporated community in southwestern Carter County, Montana, United States. It lies along U.S. Route 212 southwest of the town of Ekalaka, the county seat of Carter County. Its elevation is 3,330 feet (1,015 m), and it is located at (45.2680420, -105.0310901). Although Boyes is unincorporated, it has a post office, with the ZIP code of 59316.