Diamond Bar, CA: Local News, Events & Neighbors

Diamond Bar is a city in the San Gabriel Valley of eastern Los Angeles County, California, United States. The 2020 census listed a population of 55,072. It is named after the "diamond over a bar" branding iron registered in 1918 by ranch owner Frederic E. Lewis (1884–1963). The city features a public Los Angeles County golf course. Located at the junction of the Pomona and Orange freeways, Diamond Bar is primarily residential with shopping centers interspersed throughout the city. It is surrounded by the cities of Brea, Walnut, Chino Hills, Pomona, City of Industry, and the unincorporated areas of Rowland Heights and South Diamond Bar. Northern Diamond Bar is a part of the Pomona Unified Sc…

Official town website ↗

From Wikipedia, licensed CC BY-SA 4.0 · facts via Wikidata (CC0)

How Diamond Bar ranks

All →

#9Lowest obesity in CA #9Lowest depression in CA #21Best schools in CA All CA rankings →

Town numbers

ZIP code91765

Area code909

Living in Diamond Bar

Housing in Diamond Bar

$1.01M▲ 1.2% in a year Typical home value · Zillow

The typical Diamond Bar home is worth about $1,008,000, up 1.2% in a year, 32% above the California typical home.

A seller's market

Buyer’sBalancedSeller’s

Days on market48

Sale-to-list99.8%

Sold in May39

Zillow Home Value Index · Redfin Data CenterHousing market →

Safety in Diamond Bar

C⁺

Safety Grade C+

Diamond Bar reports more crime per resident than most U.S. towns we grade: about 58% report less. Within California, it does better than 68% of towns.

Violent crime per 1,000

Diamond Bar 1.2

California 4.3

U.S. 3.3

Property crime per 1,000

Diamond Bar 16.3

California 18.2

U.S. 15.5

FBI crime data, 2025 · crimes reported to policeCrime & safety →

Health in Diamond Bar

A

Health Grade A

Healthier than 86% of U.S. towns on seven CDC estimates.

Compared with California

24better than CA·2worse

of 32 measures CDC estimates. The other 6 are too close to call.

Conditions 9▲ 1▼ 2 close Habits 3▲ 1 close Care 5▲ 2 close Mind 3▲ 1▼ 1 close Everyday needs 4▲ 0 close

BetterToo close to callWorse

What stands out

5.5%Fewer uninsured adultsCA 10.6% · better 4%Fewer adults facing a utility shut-offCA 7.3% · better 40.2%More adults with high cholesterolCA 35.4% · worse

Care nearby

Pomona Valley Hospital Medical CenterPomona · 6.5 mi · ER

Garfield Health Center Rowland Heights Ste. 102Rowland Heights · 3.9 mi · sliding-scale fees

Primary careNo shortage

DentalNo shortage

Mental healthNo shortage

CDC PLACES 2025 · modeled estimates for adults · CDC's estimate for Diamond Bar · CMS · HRSAHealth in Diamond Bar →

Schools in Diamond Bar

All Diamond Bar schools →

B⁺

School Grade B+

The public schools Diamond Bar’s kids attend, from kindergarten through graduation, outperform 67% of California’s districts on state tests and graduation. Among towns with similar incomes, they sit near the middle.

#21Best public schoolsof 574 in CA

DistrictWalnut Valley UnifiedSchools17

Evergreen ElementaryElementary · Grades K–5 · 709 students Walnut ElementaryElementary · Grades K–5 · 706 students Quail Summit ElementaryElementary · Grades K–5 · 696 students Castle Rock ElementaryElementary · Grades K–5 · 684 students Maple Hill ElementaryElementary · Grades K–5 · 556 students Pantera ElementaryElementary · Grades K–6 · 512 students

School data from the U.S. Department of Education (NCES, EDFacts). The School Grade is our own summary of state test results and graduation rates, graded within CA. Ratings are from neighbors.