Boulder, Colorado

11 ZIP codes · Mountain time

ZIP codes (largest first)

80302 · 29,56980304 · 25,38380301 · 25,00780303 · 24,99680305 · 16,29180310 · 7,69280306 (PO box)80307 (PO box)80308 (PO box)80309 (PO box)80314 (PO box)
Population106,433
StateColorado
CountyBoulder County
Time zoneMountain
Land area26.88 sq mi

Area codes in this area

303720983

These are the area codes that most often serve Boulder (including overlays). The exact area code depends on the phone number — landlines, mobiles and overlays can differ even on the same street.

Find the ZIP+4 for an address in Boulder

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Population: U.S. Census Bureau, ACS 5-year estimates, 2024.