About Mosby, Montana
Mosby (also Half-Breed Crossing) is an unincorporated community in southwestern Garfield County, Montana, United States. It lies along Highway 200 southwest of the town of Jordan, the county seat of Garfield County. Its elevation is 2,513 feet (766 m). Mosby had a post office that opened on 1904-06-29 and closed on 1983-02-18, but the community still has a separate ZIP code of 59058.