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Where am ILOCATED

Jefferson County, Colorado

Jefferson County, Colorado, has 580,451 residents (July 2025 estimate). Its county seat is Golden. It uses Mountain Time and covers 764 sq mi (1,980 km²) of land.

DenverColorado Springs
Jefferson County in Colorado
Adams CountyArapahoe CountyClear Creek CountyDenver CountyDouglas CountyGilpin CountyLakewoodArvadaWestminsterLittletonDakota Ridge
Jefferson County and its neighbors (simplified outlines). Open in OpenStreetMap ↗
Resident population, July 2025
580,451
Land area
764 sq mi (1,980 km²)
County seat or government
Golden
Time zone
Mountain TimeUTC-07:00 in January; UTC-06:00 in July
Median household income
$110,656 ± $1,614
Median home value
$637,600 ± $3,257
Median rent, with utilities
$1,861 ± $19
Homes lived in by their owners
70.7% ± 0.6 points
County type
County
Metro or micro area
Denver-Aurora-Centennial, CO metro areaCentral county
Water area
9.64 sq mi (25 km²)
State
Colorado
County code (FIPS)
08059
Coordinates (central point)
39.579511, -105.245462
Open this point in the location finder

These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.

Time zones in Jefferson County

Time zoneLocal time and UTC offsetNext clock change
Mountain TimeAmerica/DenverUTC-07:00 in January; UTC-06:00 in July. Enable JavaScript for the live clock.Enable JavaScript for upcoming changes.

Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.

ZIP Code areas, largest first

  1. 8002054,201 people
  2. 8012344,549 people
  3. 8040143,811 people
  4. 8012743,494 people
  5. 8012836,712 people
  6. 8002136,555 people
  7. 8000335,976 people
  8. 8003135,584 people
  9. 8022834,942 people
  10. 8022734,907 people
  11. 8000433,700 people
  12. 8022631,573 people
All 34
  1. 8000528,459 people
  2. 8021427,022 people
  3. 8003326,485 people
  4. 8043924,610 people
  5. 8023223,050 people
  6. 8000221,270 people
  7. 8021220,746 people
  8. 8040320,732 people
  9. 8021519,839 people
  10. 8000719,078 people
  11. 8046516,582 people
  12. 8012515,630 people
  13. 804218,536 people
  14. 802358,373 people
  15. 804338,292 people
  16. 801354,141 people
  17. 804703,608 people
  18. 80454986 people
  19. 80453297 people
  20. 80457283 people
  21. 80425243 people
  22. 804190 people

34 ZIP Code areas overlap Jefferson County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address 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.

School districts in Jefferson County, largest first

  1. Jefferson County School District R-1586,957 people

Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.

Cities, towns and communities, largest first

These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.

  1. Lakewood, Colorado (city)156,583 people
  2. Arvada, Colorado (city)122,634 people
  3. Westminster, Colorado (city)115,484 people
  4. Littleton, Colorado (city)44,710 people
  5. Dakota Ridge, Colorado (CDP)33,753 people
  6. Ken Caryl, Colorado (CDP)33,233 people
  7. Wheat Ridge, Colorado (city)32,070 people
  8. Columbine, Colorado (CDP)25,478 people
  9. Golden, Colorado (city)20,417 people
  10. Superior, Colorado (town)13,305 people
  11. Fairmount, Colorado (CDP)9,902 people
  12. Evergreen, Colorado (CDP)8,602 people
All 27
  1. Applewood, Colorado (CDP)8,350 people
  2. West Pleasant View, Colorado (CDP)5,051 people
  3. Edgewater, Colorado (city)4,932 people
  4. Genesee, Colorado (CDP)3,778 people
  5. Coal Creek, Colorado (CDP)2,346 people
  6. Bow Mar, Colorado (town)1,047 people
  7. Indian Hills, Colorado (CDP)986 people
  8. East Pleasant View, Colorado (CDP)832 people
  9. Kittredge, Colorado (CDP)812 people
  10. Aspen Park, Colorado (CDP)742 people
  11. Mountain View, Colorado (town)609 people
  12. Morrison, Colorado (town)412 people
  13. Brook Forest, Colorado (CDP)355 people
  14. Idledale, Colorado (CDP)297 people
  15. Lakeside, Colorado (town)4 people

Bordering areas, nearest first

Distances are straight lines between map points.

  1. Denver County, Colorado23 mi northeast
  2. Clear Creek County, Colorado24 mi west
  3. Douglas County, Colorado24 mi southeast
  4. Gilpin County, Colorado25 mi northwest
  5. Broomfield County, Colorado28 mi north
  6. Boulder County, Colorado37 mi north
  7. Park County, Colorado41 mi southwest
  8. Arapahoe County, Colorado49 mi east
  9. Teller County, Colorado49 mi south
  10. Adams County, Colorado53 mi northeast

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 where you are now, check its ZIP area, or check the time zone where you are.

See this county on Census.gov ↗

Areas that only touch the edge

These areas meet the boundary only along a sliver. Most addresses here are not in them; for an address near the line, check with the county.