Lakewood is the home rule municipality that is the most populous municipality in Jefferson County, Colorado, United States. The city population was 155,984 at the 2020 U.S. Census, making Lakewood the fifth most populous city in Colorado and the 167th most populous city in the United States. Lakewood is a suburb of Denver and is a principal city of the Denver–Aurora–Lakewood, CO Metropolitan Statistical Area and a major city of the Front Range Urban Corridor.

Jefferson County is a county located in the U.S. state of Colorado. As of the 2020 census, the population was 582,910, making it the fourth-most populous county in Colorado. The county seat is Golden, and the most populous city's Lakewood.