Douglas County, Nebraska
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 606,460 in 2025, 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 30.05% 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.