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zipcodes.pro — CITY/CA/DIAMOND-BAR

Diamond Bar ZIP code, California

The ZIP code for Diamond Bar, CA is 91765, and its area codes are 909 and 840.

USPS city name
1 ZIP code
Overlapping the city
2 more
Population
53,355
Area codes
909, 840

Mail addressed to Diamond Bar uses the ZIP code above. 2 more ZIP codes cover part of the city but are addressed as somewhere else; they are listed separately below.

Diamond Bar in numbers

About 53,355 people live in Diamond Bar, in 18,005 households. The median household income is $108,281 a year, 9% above the California median of $99,122 (US: $80,734). The median owner-occupied home is valued at $902,200 (23% above the California median), and median gross rent is $2,521 a month. The median age is 45.7; 52.8% of adults 25 and over hold a bachelor's degree or higher (37.1% across California); the average commute takes 33 minutes.

Population53,355Diamond Bar53,355
Households18,005Diamond Bar18,005
Median age45.7Diamond Bar45.7California37.9US 38.9
Median household income$108,281Diamond Bar$108,281California$99,122US $80,734
Median home value$902,200Diamond Bar$902,200California$734,700US $332,700
Median gross rent$2,521Diamond Bar$2,521California$2,036US $1,413
Bachelor's degree or higher52.8%Diamond Bar52.8%California37.1%US 35.7%
Mean commute33.3 minDiamond Bar33.3 minCalifornia28.7 minUS 26.4 min
Population density3,586 / sq miDiamond Bar3,586 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place Diamond Bar city. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Diamond Bar

ZIP codes with the USPS city name Diamond Bar
ZIP City Type Population Median income Median home
91765 Diamond Bar , CA Standard 44,502 $105,565 $915,100

Other ZIP codes overlapping Diamond Bar

These ZIP codes cover part of Diamond Bar but are addressed as somewhere else.

ZIP codes overlapping Diamond Bar
ZIP City Type Population Median income Median home
91768 Pomona , CA Standard 34,200 $76,041 $573,200
91789 Walnut , CA Standard 40,298 $125,720 $975,000

Map of Diamond Bar ZIP codes

91765

The ZIP codes of Diamond Bar, CA, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near Diamond Bar

The nearest larger towns are Pomona (147,943 people, 5.1 mi), West Covina (107,037 people, 6.5 mi) and Chino Hills (77,927 people, 6.6 mi).

Towns near Diamond Bar
TownPopulationDistance
Walnut 27,611 3.3 mi
Rowland Heights 45,911 4.7 mi
South San Jose Hills 16,911 5.0 mi
Pomona 147,943 5.1 mi
Brea 47,469 5.9 mi
West Covina 107,037 6.5 mi
Chino Hills 77,927 6.6 mi
Valinda 20,962 7.0 mi
Covina 49,888 7.2 mi
Charter Oak 9,442 7.3 mi
San Dimas 33,789 7.4 mi
La Puente 37,142 8.1 mi
La Habra Heights 5,478 8.1 mi
Yorba Linda 67,170 8.2 mi

More nearby: every ZIP code in Los Angeles County · California ZIP codes

Cite this page

zipcodes.pro. “Diamond Bar, CA ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ca/diamond-bar

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