where is clay center, ks
Clay Center, KS. Sponsored Topics. Clay Center is a city in and the county seat of Clay County, Kansas, United States. As of the 2010 census, the city population was 4,334. Clay Center is located at 39Â°22â²48â³N 97Â°7â²23â³W / 39.38Â°N 97.12306Â°W / 39.38; -97.12306 (39.379920, -97.123168).