Where is Douglas County?

12 Douglas Counties in 12 states · 1.6 million people (2025)

There are 12 counties named Douglas County in the United States, in Colorado, Georgia, Illinois, Kansas, Minnesota, Missouri, Nebraska, Nevada, Oregon, South Dakota, Washington and Wisconsin. The most populous is Douglas County, Nebraska (county seat: Omaha), with 606,460 people in 2025. 12 of them are named after Stephen A. Douglas, American politician and lawyer (1813–1861).

Map of the United States showing where all 12 Douglas Counties are, labeled by state
Every Douglas 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 12 Douglas Counties

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

StateCounty seatPopulation 2025Land area (sq mi)EstablishedNamed after
Douglas County, ColoradoCastle Rock399,3968401861Stephen A. Douglas
Douglas County, GeorgiaDouglasville154,2932001870Stephen A. Douglas
Douglas County, IllinoisTuscola19,8804171859Stephen A. Douglas
Douglas County, KansasLawrence120,9204561855Stephen A. Douglas
Douglas County, MinnesotaAlexandria40,1206371858Stephen A. Douglas
Douglas County, MissouriAva12,3428141857Stephen A. Douglas
Douglas County, NebraskaOmaha606,4603271854Stephen A. Douglas
Douglas County, NevadaMinden50,1117111861Stephen A. Douglas
Douglas County, OregonRoseburg111,9515,0361852Stephen A. Douglas
Douglas County, South DakotaArmour2,8884321873Stephen A. Douglas
Douglas County, WashingtonWaterville46,4731,8191883Stephen A. Douglas
Douglas County, WisconsinSuperior43,9901,3041854Stephen A. Douglas

Questions about Douglas Counties

How many Douglas Counties are there?

There are 12 Douglas Counties in the United States, in Colorado, Georgia, Illinois, Kansas, Minnesota, Missouri, Nebraska, Nevada, Oregon, South Dakota, Washington and Wisconsin.

Which Douglas County is the largest?

By population, Douglas County, Nebraska (606,460 people in 2025). By land area, Douglas County, Oregon (5,036 sq mi).

Which Douglas County is the oldest?

Douglas County, Oregon, established in 1852. The newest is Douglas County, Washington (1883).

Why are there so many Douglas Counties?

12 of the 12 are named after Stephen A. Douglas, American politician and lawyer (1813–1861). Many counties took their names from the same founders, presidents and generals as new states were organized.

How do I find out which Douglas 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