Where is Washington County?

30 Washington Counties in 30 states · 2.8 million people (2025)

There are 30 counties named Washington County in the United States, in Alabama, Arkansas, Colorado, Florida, Georgia, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Maine, Maryland, Minnesota, Mississippi, Missouri, Nebraska, New York, North Carolina, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, Tennessee, Texas, Utah, Vermont, Virginia and Wisconsin. The most populous is Washington County, Oregon (county seat: Hillsboro), with 611,708 people in 2025. 29 of them are named after George Washington, Founding Father and first U.S. president (1732–1799).

Map of the United States showing where all 30 Washington Counties are, labeled by state
Every Washington 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 30 Washington Counties

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

StateCounty seatPopulation 2025Land area (sq mi)EstablishedNamed after
Washington County, AlabamaChatom14,8221,0801800George Washington
Washington County, ArkansasFayetteville271,2139421828–
Washington County, ColoradoAkron4,7322,5181887George Washington
Washington County, FloridaChipley26,6955851825George Washington
Washington County, GeorgiaSandersville19,4536791784George Washington
Washington County, IdahoWeiser11,5831,4531879George Washington
Washington County, IllinoisNashville13,5645631818George Washington
Washington County, IndianaSalem28,3835141814George Washington
Washington County, IowaWashington22,6675691838George Washington
Washington County, KansasWashington5,5338951857George Washington
Washington County, KentuckySpringfield12,3682971792George Washington
Washington County, MaineMachias31,3342,5631790George Washington
Washington County, MarylandHagerstown157,7314581776George Washington
Washington County, MinnesotaStillwater286,8953851849George Washington
Washington County, MississippiGreenville40,4467241827George Washington
Washington County, MissouriPotosi23,8107601813George Washington
Washington County, NebraskaBlair21,3023901854George Washington
Washington County, New YorkFort Edward59,3538311772George Washington
Washington County, North CarolinaPlymouth10,6383471799George Washington
Washington County, OhioMarietta58,3896321788George Washington
Washington County, OklahomaBartlesville54,0374161907George Washington
Washington County, OregonHillsboro611,7087241843George Washington
Washington County, PennsylvaniaWashington210,8028571781George Washington
Washington County, Rhode IslandSouth Kingstown129,7953291729George Washington
Washington County, TennesseeJonesborough141,1993271777George Washington
Washington County, TexasBrenham38,2886041836George Washington
Washington County, UtahSt. George213,6702,4281852George Washington
Washington County, VermontMontpelier59,6526871810George Washington
Washington County, VirginiaAbingdon53,8985611776George Washington
Washington County, WisconsinWest Bend139,2384311836George Washington

Questions about Washington Counties

How many Washington Counties are there?

There are 30 Washington Counties in the United States, in Alabama, Arkansas, Colorado, Florida, Georgia, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Maine, Maryland, Minnesota, Mississippi, Missouri, Nebraska, New York, North Carolina, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, Tennessee, Texas, Utah, Vermont, Virginia and Wisconsin.

Which Washington County is the largest?

By population, Washington County, Oregon (611,708 people in 2025). By land area, Washington County, Maine (2,563 sq mi).

Which Washington County is the oldest?

Washington County, Rhode Island, established in 1729. The newest is Washington County, Oklahoma (1907).

Why are there so many Washington Counties?

29 of the 30 are named after George Washington, Founding Father and first U.S. president (1732–1799). Many counties took their names from the same founders, presidents and generals as new states were organized.

How do I find out which Washington 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