Lakewood is the home rule city 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 part of the Denver-Aurora-Centennial, CO Metropolitan Statistical Area and a major city of the Front Range Urban Corridor.