One of three small unincorporated towns in Teton County, Bynum has weathered booms and busts in the past 100 years, but stubbornly lives on in the shadows of the Rocky Mountain Front foothills. Located 13 miles north of Choteau on US Highway 89, Bynum of today includes a one-room country school with a growing enrollment, a general store, post office, the office of the Bynum Irrigation District, Two Medicine Dinosaur Center, Trex Agate Shop and a collection of homes
Bynum was named for the early settlers of the Stephen Bynum family. The first post office was established in 1885 with George Fry as postmaster. The post office and store were located on the banks of Muddy Creek for easier access for the stock growers.
Bynum is located in northcentral Montana, 14 miles north of Choteau.