Glentana is an unincorporated community in Valley County, Montana, United States. Glentana is east of Opheim. The community had a post office until September 4, 2010; it still has its own ZIP code, 59240.
The Glentana post office opened in 1913 with William J. OâÂÂConnor as postmaster. During the summer of 1926, the whole town was moved nearer the Great Northern RailwayâÂÂs branch line between Scobey and Opheim.