Find the last 4 digits (ZIP+4) for an address in 91789

ZIP 91789, Walnut, CA is filled in. Just type the street address.

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ZIP Code 91789 – Walnut, CA

Walnut, California · Los Angeles County · Pacific time

ZIP code91789
CityWalnut
StateCalifornia
CountyLos Angeles County
Population40,298
Time zonePacific · local time
ZIP typeStandard (has a Census ZCTA area)
Land area15.87 sq mi
Center (lat, long)34.0182, -117.8548

Area codes in this area

626840909

These are the area codes that most often serve ZIP 91789 (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

91788 Walnut · 0.6 mi91792 West Covina · 2.7 mi91765 Diamond Bar · 3.3 mi91791 West Covina · 3.7 mi91748 Rowland Heights · 3.9 mi91724 Covina · 4.2 mi91744 La Puente · 4.8 mi91768 Pomona · 4.8 mi

About ZIP 91789

ZIP code 91789 is assigned to Walnut, California. It lies in Los Angeles County. Its Census area covers about 15.87 square miles of land. The closest neighboring ZIP is 91788 (Walnut), about 0.6 miles away.

Every address in 91789 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