Babb was named after C. C. Babb, district engineer of the Saint Mary's Irrigation Project. The first post office was established in 1905 with Cicero Bristol as postmaster. In 1912, it became the headquarters for the Reclamation Service Project which diverted water from the Saint Mary's River (which drains into the Hudson Bay) across the Hudson Bay Divide to the Milk River. Today the town consists of tourist cabins, a few houses, a general store and a post office.
Babb is located in northwestern Montana, north of the East Entrance of Glacier National Park on US Highway 89.