Diamond Bar city, California
Official LSAD Designation: Diamond Bar city • Census GEOID: 0619192
• Los Angeles County
Diamond Bar city is an incorporated city in Los Angeles County, California. According to official records from the Census (2025), Diamond Bar city had an estimated population of 51,884 residents. Official Census Bureau geographic records classify this community under LSAD designation Diamond Bar city (GEOID 0619192).
Local Government Administration U.S. Census Bureau GMAF
City Of Diamond Bar
Municipal
Official Title:
City Managers Office
Address:
21810 COPLEY DRIVE, DIAMOND BAR CA 91765-4178
County Of Los Angeles
County
Official Title:
Executive Officer Board Of Supervisors
Address:
500 W TEMPLE ST, ROOM 383, LOS ANGELES CA 90012
Civic & Statistical Snapshot
| Category | Estimate | Survey Period / Source |
|---|---|---|
| Total Population | 51,884 | 2025 |
| Median Household Income | $108,281 | 2020-2024 |
| Median Home Value | $902,200 | 2020-2024 |
| Land Area | 14.88 sq mi | Gazetteer (2026) |
| Civic & Public Services | Hospitals, Libraries, Colleges | CMS / IMLS / IPEDS |
| Schools & Districts | NCES Directory Listings | Provided by k12guides.com |
| Nearby Airports | Landing Facilities | Provided by airport-data.com |
| Climate & Weather | NOAA 30-Year Normals | 1991–2020 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).