Boulder County, Colorado Zip Codes
Boulder County is located in Colorado with a population of 80,027. The county seat is Boulder. Boulder County contains 28 zip codes and covers 740 sq mi of land area. The primary area code is 303 / 720.
County
Boulder
County Seat
Boulder
State
Colorado
Zip Codes
28
Population
80,027
Land Area
740 sq mi
Area Code
303 / 720
Boulder County is located in north-central Colorado, known for the city of Boulder and the Flatirons rock formations.
All Boulder County Zip Codes
| Zip Code | City | Population | Type | Details |
|---|---|---|---|---|
| 80301 | Boulder | 24,593 | Standard | View |
| 80027 | Louisville | 34,161 | Standard | View |
| 80501 | Longmont | 43,222 | Standard | View |
| 80302 | Boulder | 30,569 | Standard | View |
| 80303 | Boulder | 24,865 | Standard | View |
| 80026 | Lafayette | 32,675 | Standard | View |
Boulder County Map
Interactive map of Boulder County, Colorado zip codes.
Cities in Boulder County
Boulder County Demographics
Population
80,027
Zip Codes
6
Cities
4
All demographic data on this page is sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code boundary and delivery data is sourced from the United States Postal Service (USPS). Data is updated periodically and may not reflect the most current figures.