Where is Martin County?

6 Martin Counties in 6 states · 233,150 people (2025)

There are 6 counties named Martin County in the United States, in Florida, Indiana, Kentucky, Minnesota, North Carolina and Texas. The most populous is Martin County, Florida (county seat: Stuart), with 166,272 people in 2025.

Map of the United States showing where all 6 Martin Counties are, labeled by state
Every Martin 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 6 Martin Counties

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

StateCounty seatPopulation 2025Land area (sq mi)EstablishedNamed after
Martin County, FloridaStuart166,2725441925John W. Martin
Martin County, IndianaShoals9,8563361820John T. Martin
Martin County, KentuckyInez10,6972301870John Preston Martin
Martin County, MinnesotaFairmont19,4407121857Morgan Lewis Martin
Martin County, North CarolinaWilliamston21,6014561774Josiah Martin
Martin County, TexasStanton5,2849151876–

Questions about Martin Counties

How many Martin Counties are there?

There are 6 Martin Counties in the United States, in Florida, Indiana, Kentucky, Minnesota, North Carolina and Texas.

Which Martin County is the largest?

By population, Martin County, Florida (166,272 people in 2025). By land area, Martin County, Texas (915 sq mi).

Which Martin County is the oldest?

Martin County, North Carolina, established in 1774. The newest is Martin County, Florida (1925).

How do I find out which Martin 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