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Zip Code 91765 — Diamond Bar, CA

91765 is a ZIP Code associated with Diamond Bar, CA, located within Los Angeles. The postal region supports an estimated population of 44,502 residents across Data Pending housing units, with a population density of 925.1 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (33.987250, -117.814730)

Data MetricLocal Statistic
Postal / Zip Code91765
Primary CityDiamond Bar
State / ProvinceCA
CountyLos Angeles
Total Population44,502
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density925.1 people/sq mi
TimezoneAmerica/Los_Angeles

How 91765 Compares

MetricZIP 91765Los Angeles CountyCA State Average
Population44,5029,807,50139,286,245
Median IncomeData PendingN/AN/A
Population Density925.1 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 91789Walnut3.1 mi40,298N/A
Zip 92823Brea4.4 mi5,846N/A
Zip 91748Rowland Heights4.9 mi42,463N/A
Zip 91766Pomona5.0 mi69,327N/A
Zip 92821Brea5.1 mi41,623N/A

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →