Diamond Bar, California
Diamond Bar is a city of 53,355 people in Los Angeles County, California, founded in 1989.
Why visit Diamond Bar
Townapedia lists 3 museums and landmarks, 37 parks and trails, 109 places to eat, 7 places to stay and 2 attractions in and around town.
Highlights include California State Polytechnic University, Pomona, Raging Waters, Phillips Mansion and Pomona City Stables.
August is the warmest month, with average highs of 92°F; December lows average 42°F.
Weather in Diamond Bar
Forecast from the National Weather Service. Full forecast
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).
From the Wikipedia article Diamond Bar, California (this version), under CC BY-SA 4.0.
Things to do2
California State Polytechnic University, Pomona
School · 3.8 mi
Public university in Pomona, California, United States
Museums and landmarks3
Phillips Mansion
Monument and historic site · National Register of Historic Places · 4.0 mi
Building in California, United States
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Pomona City Stables
Monument and historic site · National Register of Historic Places · 5.2 mi
Building in California, United States
Parks, trails and playgrounds37
Tres Hermanos Ranch
Hiking and trails · 1.9 mi
City of industry owned property. forced to keep as nature reserve per lawsuit
Grand Avenue, Chino Hills
25 more on the map.
Restaurants and cafes109
Delicious Food Corner
Restaurant · Burger · 1.7 mi
20965 Golden Springs Drive, Diamond Bar
Mo-Su 08:30-21:00
Mazesoba Hero
Restaurant · Japanese · 3.5 mi
1247 North Grand Avenue, Walnut
Mo-Sa 11:00-14:30, Mo-Sa 17:00-20:30
Pho Ha Plus
Restaurant · Vietnamese · 1.5 mi
21090 Golden Springs Drive, Diamond Bar
Mo-Th 11:00-21:00; Fr-Su 10:00-21:00
Silver Spoons
Restaurant · Thai · 1.4 mi
233 Gentle Springs Lane, Diamond Bar
Su-Th 11:00-21:00, Fr-Sa 11:00-21:30
Starbucks
Cafe · Coffee Shop · 1.6 mi
21060 Golden Springs Drive, Diamond Bar
Mo-Fr 05:00-20:30; Sa-Su 05:30-20:30
Dilliwala Kitchen
Restaurant · Indian · 1.3 mi
303 Diamond Bar Boulevard, Diamond Bar
Tu-Sa 11:00-14:30,17:00-21:30; Su 11:00-14:30,17:00-20:30
Fusion 2 Any 1
Restaurant · Sushi
1261 Diamond Bar Boulevard, Diamond Bar
Mo-Th 11:30-15:00,16:00-21:00; Fr 11:30-21:00; Sa,Su 12:00-21:00
Jasmine Mediterranean & Persian
Restaurant · 1.5 mi
21130 Golden Springs Drive
We-Mo 11:00-22:00; Tu 00:00-00:00
97 more on the map.
History
In 1840, José de la Luz Linares received the 4,340-acre (1,760 ha) Mexican land grant Rancho Los Nogales (Ranch of the Walnut Trees) from Governor Juan Alvarado. The land grant included Brea Canyon and the eastern Walnut Valley. Linares died in 1847, and his widow sold a part of the ranch to Ricardo Vejar for $100 in merchandise, 100 calves, and the assumption of her late husband's debts. Vejar also owned the Rancho San Jose to the east, and acquired the rest of Rancho Nogales over the next 10 years.
However, Vejar's luck did not last that long. As time wore on – and particularly as the United States government took over California – Rancho Los Nogales was divided and sold into multiple land ranches, the largest of which was the Diamond Bar Ranch. At the time, it was one of the largest working cattle ranches in the western U.S. The entire Diamond Bar Ranch was acquired by the Transamerica Corporation in the 1950s for the purpose of developing one of the nation's first master-planned communities. Transamerica gave the Diamond Bar name to its new community and incorporated the ranch's familiar diamond and bar cattle brand into various logos (many of which are still in use today).
From the History section of Diamond Bar, California on Wikipedia, under CC BY-SA 4.0.
Where to stay7
Quality Inn & Suites Walnut - City Of Industry
Motel and hotel · 3.0 mi
1170 Fairway Drive, Walnut
Churches and places of worship5
The Church of Jesus Christ of Latter-day Saints
Church · Mormon · 0.4 mi
1101 Diamond Bar Boulevard, Diamond Bar
Shopping17
Gas and EV charging23
Schools, colleges and libraries73
College of Environmental Design Lyle Center of Regenerative Studies
School · 3.3 mi
4105 West University Drive, Pomona
Healthcare4
Map of Diamond Bar
250 places. The map loads OpenStreetMap tiles when you open it.
Climate by month
Monthly table
| Month | High | Low | Rain | Snow |
|---|---|---|---|---|
| Jan | 68°F | 43°F | 2.9 in | 0.0 in |
| Feb | 67°F | 44°F | 4.2 in | 0.0 in |
| Mar | 72°F | 47°F | 2.1 in | 0.0 in |
| Apr | 76°F | 50°F | 1.0 in | 0.0 in |
| May | 78°F | 54°F | 0.2 in | 0.0 in |
| Jun | 84°F | 57°F | 0.1 in | 0.0 in |
| Jul | 90°F | 62°F | 0.0 in | 0.0 in |
| Aug | 92°F | 63°F | 0.0 in | 0.0 in |
| Sep | 89°F | 60°F | 0.0 in | 0.0 in |
| Oct | 80°F | 54°F | 1.0 in | 0.0 in |
| Nov | 74°F | 47°F | 0.7 in | 0.0 in |
| Dec | 67°F | 42°F | 2.3 in | 0.0 in |
U.S. Climate Normals 1991-2020 for Pomona/Fairplex (6 mi away), NOAA NCEI.
People and cost of living
American Community Survey 5-year estimates, 2020-2024, U.S. Census Bureau. Estimates have margins of error, larger for small towns.
Disaster history
Los Angeles County has had 67 federal disaster declarations since 2000, most often for fires.
- 2025-08-08: Canyon Fire (Fire)
- 2025-01-08: Wildfires And Straight-Line Winds (Fire)
- 2025-01-08: Eaton Fire (Fire)
- 2025-01-08: Hurst Fire (Fire)
- 2025-01-07: Palisades Fire (Fire)
- 2024-12-10: Franklin Fire (Fire)
OpenFEMA disaster declarations summaries.
Getting there and nearby towns
Brackett Field (POC) is the nearest airport with scheduled flights listed in OpenStreetMap, 6 miles away.
- Walnut 3 mi northwest, about 5 min by car
- Rowland Heights 5 mi southwest, about 8 min by car
- Pomona 5 mi northeast, about 8 min by car
- South San Jose Hills 5 mi west, about 8 min by car
- Brea 6 mi southwest, about 10 min by car
- West Covina 6 mi northwest, about 10 min by car
- Chino Hills 7 mi southeast, about 11 min by car
- Covina 7 mi northwest, about 12 min by car
- Valinda 7 mi west, about 11 min by car
- San Dimas 7 mi north, about 12 min by car
Drive times are estimates from straight-line distance, not routes.
Local news
Headlines from INDB, the NEMICO news database.
Reviews, tips and questions
Loading what members have shared...
Sources and licences
- NCES EDGE (Public domain): public schools
- NOAA NCEI U.S. Climate Normals 1991-2020 (Public domain): climate by month
- OpenFEMA (Public domain): disaster declarations
- OpenStreetMap contributors (ODbL 1.0): places, airports, map data
- U.S. Census Bureau (Public domain): population, income, housing, education, commute
- Wikidata (CC0 1.0): elevation, founding date, time zone, website, landmarks and historic places
- Wikimedia Commons (see each image): photos
- Wikipedia (CC BY-SA 4.0): overview and history text
Photo credits
- Diamond Bar City Hills, Thebluewriter, CC BY-SA 4.0
- Diamond Bar Merge from United 793 (6306325762), InSapphoWeTrust from Los Angeles, California, USA, CC BY-SA 2.0
- Diamond Bar City Hall 20141215, THylbom, CC BY-SA 4.0
- Diamond Bar, CA, USA - panoramio, peter boy12qq12, CC BY 3.0
- Diamond Bar, CA, USA - panoramio (3), peter boy12qq12, CC BY 3.0
- Diamond Bar, CA, USA - panoramio (5), peter boy12qq12, CC BY 3.0
- Diamond Bar, CA, USA - panoramio (2), peter boy12qq12, CC BY 3.0
- Diamond Bar, CA, USA - panoramio (4), peter boy12qq12, CC BY 3.0
- Diamond Bar, CA, USA - panoramio (1), peter boy12qq12, CC BY 3.0
- Diamond Bar, United States (Unsplash), Nikki Prudencio nikki, CC0
- Phillips Mansion, Pomona 1, Los Angeles, CC BY-SA 3.0
- Pomona City Stables, Los Angeles, CC BY-SA 3.0
- Early 1960s Cadillac Fleetwood (5521972152), InSapphoWeTrust from Los Angeles, California, USA, CC BY-SA 2.0
- 2021-10-05 14 16 05 View southwest along California State Route 57 and the Santa Ana River as they cross Orange County, California from an airplane heading toward Los Angeles International Airport, Famartin, CC BY-SA 4.0
- Pomona Freeway, Bmamlyuk, CC0
- ISS009-E-28526 - View of California, Earth Science and Remote Sensing Unit , Lyndon B. Johnson Space Center, Public domain
- ISS063-E-7000 - View of Earth, Earth Science and Remote Sensing Unit, NASA Johnson Space Center, Public domain
- ISS042-E-122726 - View of Earth, Earth Science and Remote Sensing Unit , Lyndon B. Johnson Space Center, Public domain
- ISS016-E-26161 - View of California, Earth Science and Remote Sensing Unit , Lyndon B. Johnson Space Center, Public domain
- ISS063-E-7002 - View of Earth, Earth Science and Remote Sensing Unit, NASA Johnson Space Center, Public domain
- ISS063-E-6999 - View of Earth, Earth Science and Remote Sensing Unit, NASA Johnson Space Center, Public domain
- ISS009-E-5054 - View of California, Earth Science and Remote Sensing Unit , Lyndon B. Johnson Space Center, Public domain
- ISS042-E-122727 - View of Earth, Earth Science and Remote Sensing Unit , Lyndon B. Johnson Space Center, Public domain
- ISS034-E-49467 - View of California, Earth Science and Remote Sensing Unit , Lyndon B. Johnson Space Center, Public domain
- ISS063-E-7001 - View of Earth, Earth Science and Remote Sensing Unit, NASA Johnson Space Center, Public domain
- Ono Hawaiian BBQ multiple dishes, JimNotes, CC0
- JessicaAbel4-29-11, Jccabel, CC BY-SA 3.0
- L.A. Freeway ( winter ) (4390530668), Prayitno / Thank you for (12 millions +) view from Los Angeles, USA, CC BY 2.0
- Dudleya densiflora 240694149, velodrome, CC BY 4.0
- Throop-peak, Eeekster, CC BY 3.0
- Throop-plaque, Eeekster, CC BY-SA 3.0
- Industry Metrolink station 01, Genevaapplesauce, CC BY-SA 4.0
- Dudleya densiflora 174645939, velodrome, CC BY 4.0
- Chicken essence broth (31643846571), T.Tseng, CC BY 2.0
- Braised pork knuckle with rice set, T.Tseng, CC BY 2.0
- Braised pork rice (31722660106), T.Tseng, CC BY 2.0
- Braised pork rice (30918419584), T.Tseng, CC BY 2.0
- Braised pork knuckle with rice set - 46154067944, T.Tseng, CC BY 2.0
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