A county map of the Denver-Aurora, CO Combined Statistical Area (CSA) in the State of Colorado

Maroon: City and County of Denver, Colorado
Red: surrounding counties included in Denver-Aurora-Lakewood, CO MSA
Yellow: Boulder County, Colorado (Boulder, CO MSA)
Blue: Weld County, Colorado (Greeley, CO MSA)
Derived from the National Atlas of the United States as converted by David Benbennick (CC) and adapted by Buaidh. Later, Yassie

colored the map per components, based on this Census definitions list.
Buaidh