Lakewood is a Home Rule Municipality, the most populous city in Jefferson County. Lakewood is the fifth most populous city in the State of Colorado and the 172nd most populous city in the United States. The United States Census Bureau estimates that in April 1, 2010 the population of the City of Lakewood was 142,980. Lakewood is west of Denver and is part of the Denver-Aurora-Broomfield, CO Metropolitan Statistical Area.

The median income for a household in the city was $48,109, and the median income for a family was $57,171. Males had a median income of $39,800 versus $31,128 for females. The per capita income for the city was $25,575. About 4.8% of families and 7.1% of the population were below the poverty line, including 9.5% of those under age 18 and 4.7% of those age 65 or over.