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.

The Jewish Consumptives' Relief Society (JCRS) was a non-sectarian sanatorium to treat tuberculosis patients in Lakewood, Colorado. Founded in 1904, the sanatorium campus was also home to the first synagogue in Jefferson County, Colorado. In 1954 the institution changed its mission to cancer research and became The American Medical Center at Denver. The American Medical Center merged with the University of Colorado Anschutz Medical Campus in 2002.