Colorado: Time Zones, Counties, Cities & Map

Metro and micro areas in Colorado, largest first

7 metro areas and 10 micro areas have counties in Colorado. Populations are July 2025 estimates.

1. Denver-Aurora-Centennial, CO Metro Area3,092,037 people
2. Colorado Springs, CO Metro Area781,796 people
3. Greeley, CO Metro Area378,426 people
4. Fort Collins-Loveland, CO Metro Area377,292 people
5. Boulder, CO Metro Area328,560 people
6. Pueblo, CO Metro Area169,277 people
7. Grand Junction, CO Metro Area162,845 people
8. Rifle, CO Micro Area80,099 people
9. Durango, CO Micro Area56,898 people
10. Edwards, CO Micro Area54,291 people
11. Cañon City, CO Micro Area50,039 people
12. Montrose, CO Micro Area44,591 people

Every metro and micro area in the US

Tribal areas in Colorado, largest first

1. Southern Ute Reservation13,364 people
2. Ute Mountain Reservation and Off-Reservation Trust Land1,513 people

American Indian, Alaska Native and Native Hawaiian areas as the Census Bureau maps them, with at least 2% of their area here, water included. These lines don’t decide membership, jurisdiction or land status.

Counties and equivalents, largest first

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

1. El Paso County, Colorado757,040 people
2. Denver County, Colorado740,613 people
3. Arapahoe County, Colorado673,820 people
4. Jefferson County, Colorado580,451 people
5. Adams County, Colorado554,668 people
6. Douglas County, Colorado399,396 people
7. Weld County, Colorado378,426 people
8. Larimer County, Colorado377,292 people
9. Boulder County, Colorado328,560 people
10. Pueblo County, Colorado169,277 people
11. Mesa County, Colorado162,845 people
12. Broomfield County, Colorado79,174 people

See all 64 counties and equivalents in Colorado, largest first

Cities, towns and communities, largest first

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

1. Denver, Colorado (city)718,877 people
2. Colorado Springs, Colorado (city)487,887 people
3. Aurora, Colorado (city)394,432 people
4. Fort Collins, Colorado (city)170,229 people
5. Lakewood, Colorado (city)156,583 people
6. Thornton, Colorado (city)144,187 people
7. Arvada, Colorado (city)122,634 people
8. Westminster, Colorado (city)115,484 people
9. Pueblo, Colorado (city)111,561 people
10. Greeley, Colorado (city)110,806 people
11. Centennial, Colorado (city)108,201 people
12. Boulder, Colorado (city)106,433 people

See all 482 cities, towns and communities in Colorado, largest first

ZIP Code areas, largest first

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

1. ZIP 8013480,302 people
2. ZIP 8001373,248 people
3. ZIP 8001572,316 people
4. ZIP 8001668,268 people
5. ZIP 8063465,622 people
6. ZIP 8050463,451 people
7. ZIP 8002261,452 people
8. ZIP 8021959,523 people
9. ZIP 8022955,092 people
10. ZIP 8052554,211 people
11. ZIP 8002054,201 people
12. ZIP 8063153,722 people

See all 530 ZIP Code areas in Colorado, largest first

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