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.

The City of Englewood is a home rule municipality located in Arapahoe County, Colorado, United States. The town population was 33,659 at the 2020 United States Census. Englewood is a part of the Denver–Aurora–Lakewood, CO Metropolitan Statistical Area and the Front Range Urban Corridor. Englewood is located immediately south of Denver in the South Platte River Valley.