Biddle is a village in southeastern Powder River County, Montana, United States, near the Little Powder River. It lies along Highway 59, just south of Ranch Creek Road, and south of the town of Broadus, the county seat of Powder River County. Its elevation is 3,337 feet (1,017 m). It offers basic services only to the surrounding ranching community: a store with gas pumps, a post office, a one-room school accommodating grades K-8, a volunteer fire department, a county police officer, and a road maintenance facility.
The post office was established in 1916 with Charles Schofield as postmaster. The town name came from S. P. F. Biddle, former owner of the large Cross Ranch.