200px|right|thumb|The Clay County Leader newspaper office in Henrietta
Clay County is a county located in the U.S. state of Texas. As of the 2020 census, its population was 10,218. The county seat is Henrietta. The county was founded in 1857 and later organized in 1860. It is named in honor of Henry Clay, famous American statesman, Kentucky Senator and United States Secretary of State. Clay County is part of the Wichita Falls, Metropolitan Statistical Area in North Texas.
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The Wichita Falls rancher, oilman, and philanthropist Joseph Sterling Bridwell owned a ranch in Clay County, among his multiple holdings.
Geography
According to the U.S. Census Bureau, the county has a total area of , of which is land and (2.5%) is water.
Lake Arrowhead State Park, a development on Lake Arrowhead in Clay County, encompasses acres. The lakeshore extends 106 miles; the park offers bicycling, birding, boating, camping, canoeing, fishing, hiking, horseback riding, nature study, picnicking, swimming, and wildlife observation.
Adjacent counties
- Jefferson County, Oklahoma (north)
- Montague County (east)
- Jack County (south)
- Archer County (west)
- Wichita County (northwest)
- Cotton County, Oklahoma (northwest)