Clay County kan syfta på flera olika countyn i USA
- Clay County, Alabama
- Clay County, Arkansas
- Clay County, Florida
- Clay County, Georgia
- Clay County, Illinois
- Clay County, Indiana
- Clay County, Iowa
- Clay County, Kansas
- Clay County, Kentucky
- Clay County, Minnesota
- Clay County, Mississippi
- Clay County, Missouri
- Clay County, Nebraska
- Clay County, North Carolina
- Clay County, South Dakota
- Clay County, Tennessee
- Clay County, Texas
- Clay County, West Virginia
