Find the last 4 digits (ZIP+4) for an address in 63304

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ZIP Code 63304 – Saint Charles, MO

Saint Charles, Missouri · St. Charles County · Central time

ZIP code63304
CitySaint Charles
StateMissouri
CountySt. Charles County
Population43,195
Time zoneCentral · local time
ZIP typeStandard (has a Census ZCTA area)
Land area55.1 sq mi
Center (lat, long)38.7061, -90.6860

Area codes in this area

636

These are the area codes that most often serve ZIP 63304 (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

63338 Cottleville · 3.3 mi63368 O Fallon · 3.9 mi63005 Chesterfield · 4.7 mi63006 Chesterfield · 6.6 mi63341 Defiance · 7.2 mi63367 Lake Saint Louis · 7.5 mi63376 Saint Peters · 7.6 mi63303 Saint Charles · 8 mi

About ZIP 63304

ZIP code 63304 is assigned to Saint Charles, Missouri. It lies in St. Charles County. Its Census area covers about 55.1 square miles of land. The closest neighboring ZIP is 63338 (Cottleville), about 3.3 miles away.

Every address in 63304 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