Jefferson County, Colorado
Jefferson County is a county in Colorado. Its county FIPS code is 08059. Use the boundary map and neighboring areas below to check the jurisdiction you need.
- Official code
- 08059
- Representative coordinates
- 39.579511, -105.245462
- County type
- County
- County seat or government
- Golden
- Resident population, July 2025
- 580,451
- Land area
- 1,979.849 km²
- Water area
- 24.966 km²
- State
- Colorado
The representative point identifies this area. It is not a street address or a boundary survey.
Time zones in Jefferson County
| Time zone | Local time and UTC offset | Next clock change |
|---|---|---|
| America/Denver | UTC-07:00 in January; UTC-06:00 in July. Enable JavaScript for the live clock. | Enable JavaScript for upcoming changes. |
Listed zones overlap the mapped area. A point lookup can distinguish sides of a boundary. Your device’s zone may differ.
Census ZIP areas
80002 · 80003 · 80004 · 80005 · 80007 · 80020 · 80021 · 80031 · 80033 · 80123 · 80125 · 80127 · 80128 · 80135 · 80212 · 80214 · 80215 · 80226 · 80227 · 80228 · 80232 · 80235 · 80401 · 80403 · 80419 · 80421 · 80425 · 80433 · 80439 · 80453 · 80454 · 80457 · 80465 · 80470
These statistical areas overlap the boundary. They are not delivery assignments; confirm mailing details with USPS ZIP Code Lookup.
Official county information
Jefferson County government website ↗ is the next stop for county offices, tax, voting, jury and records information. A geographic lookup cannot determine eligibility, tax liability or a court obligation.
Cities, towns and communities
These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.
- Applewood CDP, CO
- Arvada city, CO
- Aspen Park CDP, CO
- Bow Mar town, CO
- Brook Forest CDP, CO
- Coal Creek CDP, CO
- Columbine CDP, CO
- Dakota Ridge CDP, CO
- East Pleasant View CDP, CO
- Edgewater city, CO
- Evergreen CDP, CO
- Fairmount CDP, CO
- Genesee CDP, CO
- Golden city, CO
- Idledale CDP, CO
- Indian Hills CDP, CO
- Ken Caryl CDP, CO
- Kittredge CDP, CO
- Lakeside town, CO
- Lakewood city, CO
- Littleton city, CO
- Morrison town, CO
- Mountain View town, CO
- Superior town, CO
- Westminster city, CO
- West Pleasant View CDP, CO
- Wheat Ridge city, CO
Areas sharing the mapped boundary
These areas touch this mapped boundary.
Before using this answer on a form
Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.
Find the county at your current point, check its ZIP area, or find its physical time zone.
Small boundary contacts to check
These maps have small contacts that do not confidently establish another jurisdiction or clock zone. They remain separate from the main answer. Check a precise address near the line with the responsible authority.