Troy is a city in Lincoln County, Montana, United States. The population was 797 at the 2020 census. It lies at the lowest elevation of any settlement in Montana. The town is on U.S. Route 2, near Montana Highway 56, in the Kootenai River gorge by the Kootenai National Forest. Originally inhabited by the Kutenai, Salish, and Piegan Blackfeet tribes, the area was settled by miners in the 1880s.