Boulder County, CO Zip Codes
16 zip codes across 11 cities in Boulder County, CO
About Boulder County
Boulder County, Colorado (CO) contains 16 unique zip codes spanning 11 cities and communities. Each zip code covers a different area within the county, with varying demographics, income levels, and housing markets.
Browse the complete list below to find detailed population, income, home values, cost of living, and climate data for any zip code in Boulder County.
Cities in Boulder County
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All Zip Codes in Boulder County, CO
| Zip Code | City |
|---|---|
| 80020 | Broomfield |
| 80025 | Eldorado Springs |
| 80026 | Lafayette |
| 80027 | Superior |
| 80301 | Boulder |
| 80302 | Boulder |
| 80303 | Boulder |
| 80304 | Boulder |
| 80455 | Jamestown |
| 80466 | Nederland |
| 80481 | Jamestown |
| 80501 | Longmont |
| 80503 | Longmont |
| 80510 | Allenspark |
| 80516 | Erie |
| 80540 | Lyons |
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Frequently Asked Questions
How many zip codes are in Boulder County, CO?
Boulder County, CO has 16 zip codes across 11 cities.
What cities are in Boulder County?
Cities in Boulder County include Allenspark, Boulder, Broomfield, Eldorado Springs, Erie, Jamestown, Lafayette, Longmont, Lyons, Nederland, Superior.
What state is Boulder County in?
Boulder County is located in Colorado (CO).
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. Census Bureau ZIP Code Tabulation Areas (ZCTAs) may differ slightly from USPS ZIP code boundaries.