Jefferson
CO flag

Jefferson

County

Details

GEOID
08059
State
CO
Population
580,451 (2025 est.)
Data Source
Census tiger
Center Coordinates
39.5864, -105.2505

Geographic Boundary

Data Completeness

60% (6/10)
Geographic boundary
Center coordinates
Wikipedia link
Budget link
Agencies (8)
Services
Legislative bodies
Elected officials (4)
State abbreviation
Parent jurisdiction

Agencies (8)

Jefferson County Sheriff's Office

Public_safety Jefferson

Primary law enforcement agency for Jefferson County, Colorado. Provides patrol, investigations, detention, court security, and civil process services. Over 500 state-certified deputies and almost 300 professional staff.

First Judicial District Attorney's Office

Judicial Jefferson

Prosecutes all state criminal offenses in Jefferson and Gilpin counties. Handles cases from eleven municipal police departments, two sheriffs' departments, two college police departments, and state and federal law enforcement agencies.

Jefferson County Treasurer's Office

Executive Jefferson

Elected county office responsible for collecting and distributing property taxes, managing county investments, and processing tax lien sales for Jefferson County, Colorado.

Jefferson County Public Health

Executive Jefferson

County public health department providing disease prevention, health promotion, environmental health, and community wellness services for Jefferson County, Colorado.

Jefferson County Human Services

Executive Jefferson

County department providing social services including child welfare, adult protection, public assistance, workforce development, and community support programs for Jefferson County, Colorado.

Jefferson County Clerk and Recorder

Executive Jefferson

Elected county office providing voter registration and elections, vehicle registration, marriage licenses, property records, and document recording services for Jefferson County, Colorado.

Jefferson County Assessor's Office

Executive Jefferson

Elected county office responsible for discovering, listing, and valuing all taxable property in Jefferson County for ad valorem tax purposes.

Jefferson County Board of County Commissioners

Legislative Jefferson

Governing body of Jefferson County, Colorado. Three commissioners elected from single-member districts to four-year staggered terms. Sets policy, establishes property tax rates, and adopts the county budget.