Cotton County is a county located in the U.S. state of Oklahoma. As of the 2020 census, the population was 5,527. 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.

Walters is a town in Cotton County, Oklahoma, United States. The population was 2,412 as of the 2020 United States census. The city, nestled between twin creeks, is the county seat of Cotton County. The city's motto is "Small town; Big heart".