Glasgow is a city in and the county seat of Valley County, Montana, United States. The population was 3,253 at the 2000 census.
Glasgow was founded in 1887 as a railroad town by James J. Hill, who was responsible for creating many communities along the Hi-Line. The town was named after Glasgow in Scotland. Glasgow grew during the 1930s when President Franklin Roosevelt authorized the construction of the Fort Peck Dam, which became a major source of employment for the Glasgow area. In the 1960s the population rose to about 12,000 due to the nearby presence of the Glasgow Air Force Base, used during the Vietnam War and the earlier part of the Cold War. After the de-activation and closure of the base in 1969, Glasgow's population declined.
Glasgow is located at 48°11′54″N 106°38′7″W / 48.19833°N 106.63528°W / 48.19833; -106.63528 (48.198252, -106.635402).