Diamond Bar
City in Los Angeles County, California

Diamond Bar is a city in Los Angeles County, California, with 55,072 residents (2020 Census). It sits at 696 ft (212 m) above sea level. The nearest town is Walnut, 3.3 miles NW.
- 55,072residents (2020 Census)
- 696 ftelevation · 212 m
- 14.9 sq miland area · 38.5 km²
- 3,702 / sq mipopulation density
- 91765main ZIP code (2 in total)
About Diamond Bar
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 School District. Southern Diamond Bar is a part of the Walnut Valley Unified School District. The city is also served by International Polytechnic High School. It also has the first hydrogen fueling station to be built in Southern California, near the South Coast Air Quality Management District building.
Text: Wikipedia · CC BY-SA 4.0
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- Median household income
- $108,281
- Median home value
- $902,200
- Median rent
- $2,521/mo
- Median age
- 45.7
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Map of Diamond Bar
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Open in Google Maps ›Diamond Bar, CA population
Diamond Bar had 55,072 residents in the 2020 Census.
| 2020 Census | 55,072 |
|---|---|
| Density | 3,702 per sq mi (1,429 per km²) |
Source: U.S. Census Bureau, Decennial Census.
Diamond Bar at a glance
| State | California (CA) |
|---|---|
| County | Los Angeles County |
| Type | City |
| Population | 55,072 (2020) |
| Land area | 14.88 sq mi (38.5 km²) |
| Water area | 0.01 sq mi (0.01 km²) |
| Elevation | 696 ft (212 m) |
| Coordinates | 34.0016° N, 117.8176° W |
| ZIP codes | 91765, 91789 |
| Official website | ci.diamond-bar.ca.us |
| Census code (GEOID) | 0619192 |
Sources: U.S. Census Bureau (Gazetteer, ZCTA), USGS GNIS, Wikidata.
Towns near Diamond Bar
- Walnut3.3 mi NW
- Rowland Heights4.7 mi SW
- South San Jose Hills5.0 mi W
- Pomona5.1 mi NE
- Brea5.9 mi SW
- West Covina6.5 mi NW
- Chino Hills6.6 mi SE
- Valinda7.0 mi W
- Covina7.2 mi NW
- Industry7.2 mi W
- Charter Oak7.3 mi N
- San Dimas7.4 mi N
Straight-line distance between town centers.
Frequently asked questions about Diamond Bar
What county is Diamond Bar in?
Diamond Bar is in Los Angeles County, California.
What is the population of Diamond Bar, CA?
55,072 people lived in Diamond Bar at the 2020 Census.
What is the ZIP code of Diamond Bar, CA?
The main ZIP code is 91765. Other ZIP codes: 91789.
What is the elevation of Diamond Bar?
696 feet (212 m) above sea level.
What towns are near Diamond Bar?
Walnut (3.3 mi), Rowland Heights (4.7 mi), South San Jose Hills (5.0 mi), Pomona (5.1 mi), Brea (5.9 mi).
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