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.

Lincoln County is a county located in the U.S. state of Montana. As of the 2020 census, the population was 19,677. Its county seat is Libby. The county was founded in 1909 and named for President Abraham Lincoln. The county lies on Montana's north border and thus shares the US-Canadian border with the Canadian province of British Columbia.