- Cohagen redirects here. Not to be confused with Cohaagen, a character in the film Total Recall.
Cohagen is an unincorporated community in southeastern Garfield County, Montana, United States. It lies along Highway 59 southeast of the town of Jordan, the county seat of Garfield County. Its elevation is 2,720 feet (829 m). Although Cohagen is unincorporated, it has a post office, with the ZIP code of 59322, which opened on 1905-08-18.
According to the Köppen Climate Classification system, Cohagen has a semi-arid climate, abbreviated "BSk" on climate maps.