The seat of Sheridan County
, Plentywood is located 16 miles south of the Canadian border between Archer and Antelope on Hwys 5 and 15 near the Fort Peck Reservation. Just south of a 24-hour Canadian border station, Plentywood is a major gateway to Montana.
The Sheridan County Museum here features the state's longest interior mural, depicting the history of the county.
The population estimate for July 1, 1998 was 1,953, a decrease of 183 since 1990.