Where is Carter County?

5 Carter Counties in 5 states · 139,221 people (2025)

There are 5 counties named Carter County in the United States, in Kentucky, Missouri, Montana, Oklahoma and Tennessee. The most populous is Carter County, Tennessee (county seat: Elizabethton), with 57,361 people in 2025.

Map of the United States showing where all 5 Carter Counties are, labeled by state
Every Carter 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 5 Carter Counties

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

StateCounty seatPopulation 2025Land area (sq mi)EstablishedNamed after
Carter County, KentuckyGrayson26,1494101838William Grayson Carter
Carter County, MissouriVan Buren5,4185071859Zimri A. Carter
Carter County, MontanaEkalaka1,3833,3411917Thomas H. Carter
Carter County, OklahomaArdmore48,9108221907Ben W. Carter
Carter County, TennesseeElizabethton57,3613411796Landon Carter

Questions about Carter Counties

How many Carter Counties are there?

There are 5 Carter Counties in the United States, in Kentucky, Missouri, Montana, Oklahoma and Tennessee.

Which Carter County is the largest?

By population, Carter County, Tennessee (57,361 people in 2025). By land area, Carter County, Montana (3,341 sq mi).

Which Carter County is the oldest?

Carter County, Tennessee, established in 1796. The newest is Carter County, Montana (1917).

How do I find out which Carter 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.

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Other common county names