Template:Wp-Douglas County, Colorado

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Douglas County is a county located in the U.S. state of Colorado. As of the 2020 census, the population was 357,978. The county seat is Castle Rock.

Douglas County is part of the Denver-Aurora-Lakewood, Colorado, metropolitan statistical area. It is located midway between Colorado's two largest cities, Denver and Colorado Springs, and contains a portion of Aurora, the state's third-largest city. Douglas County has the highest median household income of any Colorado county or statistical equivalent. It is ranked seventh nationally in that category.