Balko is a small unincorporated community in Beaver County, Oklahoma, United States. The post office was established March 14, 1904. The population is 623.There is a truck stop in Balko. It sells untaxed diesel fuel. The Red Barn Cafe, formerly owned by the Brady family, is a small country diner. These and the post office are located at Bryan's Corner.The local school is a K-12 public school.