Clay County

Most are named after Henry Clay, except Arkansas (originally named Clayton County, see Wikipedia), Iowa (Henry Clay Jr.), and Kentucky (Green Clay).

Clay County

1. one of 67 counties in Alabama, USA, with its county seat in Ashland.
2. one of 75 counties in Arkansas, USA, with two county seats, Corning and Piggott.
3. one of 67 counties in Florida, USA, county seat Green Cove Springs.
4. one of 159 counties in Georgia, USA, county seat Fort Gaines.
5. one of 102 counties in Illinois, USA, county seat Louisville.
6. one of 92 counties in Indiana, USA, county seat Brazil.
7. one of 99 counties in Iowa, USA, county seat Spencer.
8. one of 105 counties in Kansas, USA, county seat Clay Center.
9. one of 120 counties in Kentucky, USA, county seat Manchester.
10. one of 87 counties in Minnesota, USA, county seat Moorhead.
11. one of 82 counties in Mississippi, USA, county seat West Point.
12. one of 114 counties in Missouri, USA, county seat Liberty.
13. one of 93 counties in Nebraska, USA, county seat Clay Center.
14. one of 100 counties in North Carolina, USA, county seat Hayesville.
15. one of 66 counties in South Dakota, USA, county seat Vermillion.
16. one of 95 counties in Tennessee, USA, county seat Celina.
17. one of 254 counties in Texas, USA, county seat Henrietta.
18. one of 55 counties in West Virginia, USA, county seat Clay.

• Index of U.S. counties#C on Wikipedia.Wikipedia