Where is Clay County?

18 Clay Counties in 18 states · 764,094 people (2025)

There are 18 counties named Clay County in the United States, in Alabama, Arkansas, Florida, Georgia, Illinois, Indiana, Iowa, Kansas, Kentucky, Minnesota, Mississippi, Missouri, Nebraska, North Carolina, South Dakota, Tennessee, Texas and West Virginia. The most populous is Clay County, Missouri (county seat: Liberty), with 265,032 people in 2025. 17 of them are named after Henry Clay, American politician from Kentucky (1777-1852).

Map of the United States showing where all 18 Clay Counties are, labeled by state
Every Clay County in the United States (red), labeled with its state. Boundaries: U.S. Census Bureau, 2025. Free to use with attribution (CC BY 4.0).

All 18 Clay Counties

Sorted by state. Each link opens the county's map.

StateCounty seatPopulation 2025Land area (sq mi)EstablishedNamed after
Clay County, AlabamaAshland14,2076041866Henry Clay
Clay County, ArkansasCorning, Piggott14,0526391873Henry Clay, John M. Clayton
Clay County, FloridaGreen Cove Springs239,5936051858Henry Clay
Clay County, GeorgiaFort Gaines2,8151951854Henry Clay
Clay County, IllinoisLouisville12,7934681824Henry Clay
Clay County, IndianaBrazil26,4103581825Henry Clay
Clay County, IowaSpencer16,2025671851Henry Clay
Clay County, KansasClay Center7,9906451857Henry Clay
Clay County, KentuckyManchester19,4654691807Green Clay
Clay County, MinnesotaMoorhead67,7341,0451862Henry Clay
Clay County, MississippiWest Point18,2384101871Henry Clay
Clay County, MissouriLiberty265,0323981822Henry Clay
Clay County, NebraskaClay Center6,170572–Henry Clay
Clay County, North CarolinaHayesville12,2392151861Henry Clay
Clay County, South DakotaVermillion15,0314121862Henry Clay
Clay County, TennesseeCelina7,8212371870Henry Clay
Clay County, TexasHenrietta10,7641,0891857Henry Clay
Clay County, West VirginiaClay7,5383421858Henry Clay

Questions about Clay Counties

How many Clay Counties are there?

There are 18 Clay Counties in the United States, in Alabama, Arkansas, Florida, Georgia, Illinois, Indiana, Iowa, Kansas, Kentucky, Minnesota, Mississippi, Missouri, Nebraska, North Carolina, South Dakota, Tennessee, Texas and West Virginia.

Which Clay County is the largest?

By population, Clay County, Missouri (265,032 people in 2025). By land area, Clay County, Texas (1,089 sq mi).

Which Clay County is the oldest?

Clay County, Kentucky, established in 1807. The newest is Clay County, Arkansas (1873).

Why are there so many Clay Counties?

17 of the 18 are named after Henry Clay, American politician from Kentucky (1777-1852). Many counties took their names from the same founders, presidents and generals as new states were organized.

How do I find out which Clay County an address is in?

Open the county map of the state: it has a search box for cities, towns and ZIP codes. On a phone, the "what county am I in" tool on our sister site uses your location.

What county am I in? →

Other common county names