Douglas County, Nebraska

Douglas County, Nebraska
Location within the U.S. state of Nebraska
Coordinates: 41°17′50″N 96°09′15″W / 41.297091°N 96.154066°W / 41.297091; -96.154066
Country United States
State Nebraska
FoundedNovember 23, 1854
Named afterStephen A. Douglas
SeatOmaha
Largest cityOmaha
Area
 • Total
349.342 sq mi (904.79 km2)
 • Land326.540 sq mi (845.73 km2)
 • Water12.802 sq mi (33.16 km2)  3.66%
Population
 (2020)
 • Total
584,526
 • Estimate 
(2024)
601,158
 • Density1,790.06/sq mi (691.146/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)
Area code402 and 531
Congressional district2nd
Websitedouglascounty-ne.gov
• Nebraska county number 28
• Nebraska license plate prefix 01

Douglas County is a county located in the U.S. state of Nebraska. As of the 2020 census, the population was 584,526, and was estimated to be 601,158 in 2024, making it the most populous county in Nebraska. The county seat and the largest city is Omaha. the most populous city in Nebraska and the 41st-most populous city in the United States. It contains over 29.98% of the state's population.

Douglas County is part of the Omaha-Council Bluffs, NE-IA Metropolitan Statistical Area.

In the Nebraska license plate system, Douglas County was represented by the prefix "1" (as it had the largest number of vehicles registered in the state when the license plate system was established in 1922). In 2002, the state discontinued the 1922 system in the three most populous counties: Douglas, Lancaster, and Sarpy Counties.