DeKalb County Alabama Cities/Towns - Collinsville, Crossville, Dawson, Fort Payne (County Seat), Fyffe, Geraldine, Grove Oak, Henager, Ider, Mentone, Portersville, Rainsville, Sylvania, Valley Head

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DeKalb County is a county of the U.S. state of Alabama. As of 2016 its population was 81,799. Its county seat is Fort Payne. History DeKalb County was created by the Alabama legislature on January 9, 1836, from land ceded to the Federal government by the Cherokee Nation. It was named for Major General Baron Johann de Kalb, a hero of the American Revolution.