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 is Lakewood.
Jefferson County is included in the Denver-Aurora-Lakewood, CO Metropolitan Statistical Area. Located along the Front Range of the Rocky Mountains, Jefferson County is adjacent to the state capital of Denver.
In 2010, the center of population of Colorado was located in Jefferson County.The county's slogan is the "Gateway to the Rocky Mountains", and it is commonly nicknamed Jeffco.
Wikipedia https://en.wikipedia.org/wiki/Jefferson_County,_Colorado
Coordinates 39°45'16.686" N -105°13'14.088" E
