Beaver county is located in the Oklahoma Panhandle east of Texas County. The town of Beaver acts as the county seat. The county population on July 1, 1999, was 6,016, a decrease of 7 over the 1990 census.
Bordered on the north by Kansas and the south by Texas, Beaver County was crossed by the Jones and Plummer Trail. Established around 1874, this trail served first as a supply route and then a cattle trail between Texas and Kansas.
The Beaver River flows easterly through the county before emptying into the North Canadian River at Fort Supply Lake in Woodward County. Beaver Dunes State Park is situated north of the river just northwest of Beaver and serves as the main recreational provider for the area.