Boulder County, Colorado
18 ZIP codes · 726.41 sq mi of land · FIPS 08013
| Population | 328,961 |
|---|---|
| State | Colorado |
| FIPS code | 08013 |
| Time zone | Mountain |
| Land area | 726.41 sq mi |
| Center (lat, long) | 40.0950, -105.3977 |
Area codes in this area
These are the area codes that most often serve Boulder County (including overlays). The exact area code depends on the phone number — landlines, mobiles and overlays can differ even on the same street.
Cities and towns (largest first)
Boulder · 106,433Longmont · 99,406Lafayette · 30,602Louisville · 20,786Eldorado SpringsJamestownNederlandPinecliffeWardAllensparkLyonsNiwot
ZIP codes in Boulder County
80025 Eldorado Springs80026 Lafayette80027 Louisville80301 Boulder80302 Boulder80303 Boulder80304 Boulder80305 Boulder80310 Boulder80455 Jamestown80466 Nederland80471 Pinecliffe80481 Ward80501 Longmont80503 Longmont80510 Allenspark80540 Lyons80544 Niwot
Population: U.S. Census Bureau, ACS 5-year estimates, 2024.