Colorado Demographics Site Map

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Browse Colorado Zip Codes

• Zip Codes by Population

Largest 10 Counties by Population

1. El Paso County
2. Denver County
3. Arapahoe County
4. Jefferson County
5. Adams County
6. Larimer County
7. Douglas County
8. Boulder County
9. Weld County
10. Pueblo County

Largest 10 Cities by Population

1. Denver
2. Colorado Springs
3. Aurora
4. Fort Collins
5. Lakewood
6. Thornton
7. Arvada
8. Westminster
9. Pueblo
10. Greeley

Largest 10 Zip Codes by Population

1. 80013
2. 80219
3. 80015
4. 80134
5. 80634
6. 80016
7. 80525
8. 80631
9. 80229
10. 80504