Leedey is a town in Dewey County, Oklahoma, United States. The population was 415 at the 2020 census. The town was named for Amos Leedey, an early settler. The post office opened January 6, 1900, with Amos Leedey as the first postmaster. Leedey became a railroad town when the Wichita Falls and Northwestern Railway completed a line i…Leedey is a town in Dewey County, Oklahoma, United States. The population was 415 at the 2020 census. The town was named for Amos Leedey, an early settler. The post office opened January 6, 1900, with Amos Leedey as the first postmaster. Leedey became a railroad town when the Wichita Falls and Northwestern Railway completed a line in from Elk City in 1911, and the town incorporated that same year. Both petroleum and agriculture contributed to the town’s growth.