卡顿县（Cotton County, Oklahoma）是美国奥克拉荷马州南部的一个县，南隔雷德河与德克萨斯州相望。面积1,663平方公里。根据美国2000年人口普查，共有人口6,614人。县治沃尔特斯 (Walters)。

成立于1912年8月12日。县名可能来自棉花。

Cotton County is a county located in the U.S. state of Oklahoma. As of the 2010 census, the population was 6,193. Its county seat is Walters. When Oklahoma achieved statehood in 1907, the area which is now Cotton County fell within the boundaries of Comanche County. It was split off in 1912, becoming the last county created in Oklahoma; it was named for the county's primary crop.