Find the last 4 digits (ZIP+4) for an address in 80303

ZIP 80303, Boulder, CO is filled in. Just type the street address.

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ZIP Code 80303 – Boulder, CO

Boulder, Colorado · Boulder County · Mountain time

ZIP code80303
CityBoulder
StateColorado
CountyBoulder County
Population24,996
Time zoneMountain · local time
ZIP typeStandard (has a Census ZCTA area)
Land area21.88 sq mi
Center (lat, long)39.9732, -105.2093

Area codes in this area

303720983

These are the area codes that most often serve ZIP 80303 (including overlays). The exact area code depends on the phone number — landlines, mobiles and overlays can differ even on the same street.

Map

Nearby ZIP codes

80305 Boulder · 2.1 mi80027 Louisville · 3.1 mi80310 Boulder · 3.5 mi80309 Boulder · 4.3 mi80301 Boulder · 5 mi80025 Eldorado Springs · 5.8 mi80026 Lafayette · 6.4 mi80304 Boulder · 6.5 mi

About ZIP 80303

ZIP code 80303 is assigned to Boulder, Colorado. It lies in Boulder County. Its Census area covers about 21.88 square miles of land. The closest neighboring ZIP is 80305 (Boulder), about 2.1 miles away.

Every address in 80303 also has a 4-digit add-on code (ZIP+4) that points to a smaller delivery area. Use the box above to find it.

Sources: US Census Bureau (ZCTA, county relationship files), GeoNames (CC BY 4.0), NANPA via NumberResearch.org (CC BY 4.0). Map © OpenStreetMap contributors. ZIP areas are approximate. Population: U.S. Census Bureau, ACS 5-year estimates, 2024 (ZCTA). Data sources