Jefferson County, Colorado

Jefferson County profile, demographic data, and geographic information.

Local Government & Public Administration

Authoritative general-purpose local government units serving this area U.S. Census Bureau GUS (2026) / GMAF

Government Unit	Unit Type	Jurisdiction Role	Contact / Address
COUNTY OF JEFFERSON GUS Population: 578,533 (2024) ID: 123711	County	Official County Government	Contact: ASSISTANT COUNTY ADMINISTRATOR 100 JEFFERSON COUNTY PKWY, GOLDEN CO 80419-5550
CITY OF LAKEWOOD GUS Population: 156,868 (2024) ID: 161376	Municipal	Municipal Government Within County	Contact: FINANCE DIRECTOR 445 S ALLISON PKWY, LAKEWOOD CO 80226-3105
CITY OF ARVADA GUS Population: 121,873 (2024) ID: 161374	Municipal	Municipal Government Within County	Contact: DEPUTY CITY MANAGER 8101 RALSTON RD, ARVADA CO 80002-2400
CITY OF WHEAT RIDGE GUS Population: 31,999 (2024) ID: 101405	Municipal	Municipal Government Within County	Contact: CITY MANAGER 7500 W 29TH AVE, WHEAT RIDGE CO 80033-8001
CITY OF GOLDEN GUS Population: 20,151 (2024) ID: 184587	Municipal	Municipal Government Within County	Contact: SENIOR CITY PLANNER 1445 10TH ST, GOLDEN CO 80401
CITY OF EDGEWATER GUS Population: 4,880 (2024) ID: 123742	Municipal	Municipal Government Within County	Contact: FINANCE DIRECTOR 2401 SHERIDAN BLVD, EDGEWATER CO 80214-1199
TOWN OF MOUNTAIN VIEW GUS Population: 521 (2024) ID: 123743	Municipal	Municipal Government Within County	Contact: TOWN CLERK TREASURER 4176 BENTON ST, DENVER CO 80212-7326
TOWN OF MORRISON GUS Population: 394 (2024) ID: 194653	Municipal	Municipal Government Within County	Contact: TOWN ADMINISTRATOR 321 HIGHWAY 8, MORRISON CO 80465
TOWN OF LAKESIDE GUS Population: 15 (2024) ID: 161375	Municipal	Municipal Government Within County	Contact: ACCOUNTANT PO BOX 12672, DENVER CO 80212-0672