Find the last 4 digits (ZIP+4) for an address in 91765

ZIP 91765, Diamond Bar, CA is filled in. Just type the street address.

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ZIP Code 91765 – Diamond Bar, CA

Diamond Bar, California · Los Angeles County · Pacific time

ZIP code91765
CityDiamond Bar
StateCalifornia
CountyLos Angeles County
Population44,502
Time zonePacific · local time
ZIP typeStandard (has a Census ZCTA area)
Land area18.57 sq mi
Center (lat, long)33.9852, -117.8120

Area codes in this area

840909

These are the area codes that most often serve ZIP 91765 (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

91789 Walnut · 3.3 mi91788 Walnut · 3.9 mi92823 Brea · 4 mi92821 Brea · 4.4 mi91766 Pomona · 5.1 mi91748 Rowland Heights · 5.2 mi91768 Pomona · 5.6 mi91709 Chino Hills · 5.7 mi

About ZIP 91765

ZIP code 91765 is assigned to Diamond Bar, California. It lies in Los Angeles County. Its Census area covers about 18.57 square miles of land. The closest neighboring ZIP is 91789 (Walnut), about 3.3 miles away.

Every address in 91765 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