| ZIP | County | State | Area Code | Time Zone |
| 80301 | Boulder | CO | 303 | MST |
| 80302 | Boulder | CO | 303 | MST |
| 80303 | Boulder | CO | 303 | MST |
| 80304 | Boulder | CO | 303 | MST |
| 80305 | Boulder | CO | 303 | MST |
| 80306 | Boulder | CO | 303 | MST |
| 80307 | Boulder | CO | 303 | MST |
| 80308 | Boulder | CO | 303 | MST |
| 80309 | Boulder | CO | 303 | MST |
| 80310 | Boulder | CO | 303 | MST |
| 80314 | Boulder | CO | 303 | MST |
| 80321 | Boulder | CO | 303 | MST |
| 80322 | Boulder | CO | 303 | MST |
| 80323 | Boulder | CO | 303 | MST |
| 80328 | Boulder | CO | 303 | MST |
| 80329 | Boulder | CO | 303 | MST |