Jefferson County Colorado Boundary Map

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.
  • Country: United States
  • State: Colorado
  • Founded: November 1, 1861
  • Named for: Jefferson Territory
  • Seat: Golden
  • Largest city: Lakewood
  • Congressional districts: 1st, 2nd, 6th, 7th

Nearby

Data from: en.wikipedia.org