Where is Diamond Bar, California Located in the United States? - Diamond Bar is a city located in the Los Angeles County in California, United States. Diamond Bar lies between 33.9992 Degrees North latitudes and -117.8164 Degrees West longitudes.
Location Map of Diamond Bar, Los Angeles, California
About Map: The map shows the location of Diamond Bar in Los Angeles County, in the U.S. state of California.
Diamond Bar Map, California, USA
About Diamond Bar Map: This Google Map provides a detailed view with zoom, satellite, and street options to explore the area and its surroundings.
About Diamond Bar, Los Angeles County, California
Diamond Bar is located in Los Angeles County in the U.S. state of California, United States. It lies in the southern part of the state in the state of the United States within the eastern San Gabriel Valley near the border with San Bernardino County. The city was incorporated in 1989 and was named after the historic Diamond Bar Ranch, which derived its name from a cattle branding symbol, and it developed from ranch land into a suburban residential community.
Population
According to the United States Census Bureau, the population of Diamond Bar is 55,072 as recorded in the 2020 Census, and the population density is approximately 3,700 people per square mile.
Geography
According to the United States Census Bureau, Diamond Bar covers a total area of approximately 14.9 square miles (about 38.6 square kilometers), including about 14.8 square miles (38.3 square kilometers) of land and 0.1 square miles (0.3 square kilometers) of water.
Location and Surroundings
Diamond Bar is situated east of Walnut and west of Chino Hills, positioned within rolling hills at the eastern edge of Los Angeles County. The city features residential neighborhoods, landscaped parks, and nearby open space areas. State Route 60 and State Route 57 provide major transportation routes connecting Diamond Bar to Los Angeles, Orange County, and the Inland Empire.
Top Attractions
Diamond Bar offers parks, golf courses, and community facilities that support recreation and outdoor activities. Popular destinations include Pantera Park, the Diamond Bar Golf Course, and the nearby Chino Hills State Park. The city hosts community events and recreational programs that reflect its suburban environment and family-oriented lifestyle.
Transportation
Diamond Bar is served by State Route 60 and State Route 57, offering convenient highway access throughout Southern California. Public transportation includes regional bus services connecting the city to surrounding communities and transit hubs. The nearest major airport is Ontario International Airport, located approximately 20 miles to the east.
Explore more cities in California or visit the United States Map section to learn more about the country’s geography.
Sources:
Population and area data sourced from the United States Census Bureau (2020 Census). General city information referenced from the Official Diamond Bar City Website.
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Diamond Bar City Facts
| City | Diamond Bar |
| State | California |
| County | Los Angeles County |
| Country | United States |
| Region | San Gabriel Valley |
| Incorporated | April 18, 1989 |
| Founded | 1918 (Diamond Bar Ranch) |
| Total Area | Approximately 14.9 sq mi (38.6 km2) |
| Land Area | Approximately 14.9 sq mi (38.6 km2) |
| Elevation | Approximately 524 ft (160 m) |
| Population (2023 estimate) | Approximately 56,000+ |
| Population (2020 Census) | 55,072 |
| Population Density | Approximately 3,700 people per sq mi |
| Time Zone | Pacific Time (UTC-8 / UTC-7 DST) |
| ZIP Codes | 91765 |
| Area Code | 909 |
| Major Highways | State Route 57, State Route 60 |
| Public Transit | Foothill Transit Bus |
| Major Attractions | Pantera Park, Sycamore Canyon Park, Diamond Bar Golf Course |
| Official Website | https://www.diamondbarca.gov/ |
Distance from Diamond Bar, CA to Nearby Cities
- Walnut, CA – 4 miles (6 km)
- Pomona, CA – 6 miles (10 km)
- Chino Hills, CA – 8 miles (13 km)
- West Covina, CA – 10 miles (16 km)
- Rowland Heights, CA – 6 miles (10 km)
- La Puente, CA – 9 miles (14 km)
- Covina, CA – 12 miles (19 km)
- Glendora, CA – 14 miles (23 km)
- Ontario, CA – 15 miles (24 km)
- Chino, CA – 12 miles (19 km)
- Rancho Cucamonga, CA – 20 miles (32 km)
- Upland, CA – 18 miles (29 km)
- Anaheim, CA – 20 miles (32 km)
- Fullerton, CA – 18 miles (29 km)
- Riverside, CA – 30 miles (48 km)
- Corona, CA – 25 miles (40 km)
- Pasadena, CA – 25 miles (40 km)
- Los Angeles, CA – 30 miles (48 km)
- Long Beach, CA – 35 miles (56 km)
- Irvine, CA – 35 miles (56 km)
Diamond Bar, California Climate and Weather Overview
| Month | Avg High (°F) | Avg Low (°F) | Avg Rainfall (in) |
|---|---|---|---|
| January | 68 | 45 | 3.1 |
| April | 75 | 52 | 0.9 |
| July | 90 | 66 | 0.1 |
| October | 82 | 58 | 0.6 |
| Annual | 79 | 55 | 14.5 |
| Climate Attribute | Details |
|---|---|
| Climate Classification (Köppen) | Hot-Summer Mediterranean (Csa) |
| Annual Rainfall | About 14.5 inches |
| Annual Sunshine Days | Approximately 284 days |
| Hurricane/Tornado Risk | Very low hurricane risk; very low tornado risk |
| Snowfall | Rare |
Driving Distances from Diamond Bar, California
| City | State | Distance (mi) | Approx. Drive Time |
|---|---|---|---|
| Walnut | California | 4 | 8 min |
| Rowland Heights | California | 5 | 10 min |
| Pomona | California | 7 | 15 min |
| Chino Hills | California | 7 | 15 min |
| Brea | California | 8 | 15 min |
| La Habra | California | 10 | 18 min |
| West Covina | California | 11 | 20 min |
| Fullerton | California | 13 | 22 min |
| Anaheim | California | 18 | 30 min |
| Los Angeles | California | 30 | 40 min |
Transportation and Connectivity in Diamond Bar, California
| Transportation | Details |
|---|---|
| Airport Name | Ontario International Airport |
| IATA Code | ONT |
| Port | No commercial port |
| Major Highways | State Route 57, State Route 60, Interstate 10 (nearby), State Route 71 (nearby) |
| Train/Amtrak Service | Nearest Metrolink and Amtrak stations at Pomona and Industry |
| Local Bus/Transit Service | Foothill Transit and Los Angeles Metro regional bus services |
- State Route 57 (Orange Freeway) provides direct access to Orange County, Pomona, and Interstate 10.
- State Route 60 (Pomona Freeway) connects Diamond Bar with downtown Los Angeles, Riverside, and the Inland Empire.
- State Route 71 links the city with Chino Hills, Corona, and northern Orange County.
- Foothill Transit operates regional bus routes connecting Diamond Bar with nearby cities, employment centers, and transit hubs.
Key Landmarks and Places to Visit in Diamond Bar, California
| Landmark Name | Type |
|---|---|
| Summitridge Park | Community Park |
| Pantera Park | City Park |
| Sycamore Canyon Park | Nature Park |
| Diamond Bar Golf Course | Golf Course |
| Frank & Son Collectible Show | Shopping & Entertainment |
| Steele Canyon Nature Center | Nature Center |
| Schabarum Regional Park | Regional Park |
| Carbon Canyon Regional Park | Regional Park |
| The Hsi Lai Temple | Buddhist Temple |
| Diamond Bar Center | Event & Conference Center |
Colleges and Universities in Diamond Bar, California
| Institution Name | Type | Level | Notable For |
|---|---|---|---|
| Mt. San Antonio College | Public | Community College | Transfer, career, and workforce education |
| California State Polytechnic University, Pomona | Public | University | Engineering, agriculture, and architecture |
| Western University of Health Sciences | Private | University | Health sciences and medical education |
| University of La Verne | Private | University | Business, education, and law |
| Diamond Bar-Walnut Education Partnership | Public | K-12 Education | Local public education services |
Waterbodies in Diamond Bar, California
Brea Creek, Tonner Canyon Creek, Walnut Creek, Carbon Canyon Creek, Puddingstone Reservoir, Bonelli Lake, San Jose Creek, Santa Ana River (nearby)
Golf Courses in Diamond Bar, California
Diamond Bar Golf Course, Los Serranos Golf Club, Industry Hills Golf Club at Pacific Palms, Mountain Meadows Golf Course, Black Gold Golf Club, Friendly Hills Country Club
Diamond Bar, California - Key Historical Facts
- The area was originally part of the Spanish and Mexican land grant known as Rancho Los Nogales before becoming the Diamond Bar Ranch in the early 20th century.
- The famous "Diamond over a Bar" cattle brand gave the community its distinctive name and remains the inspiration for the city's official identity.
- Large-scale residential development began during the late 1950s and accelerated throughout the 1960s and 1970s as Southern California expanded eastward.
- Diamond Bar officially incorporated as a city in 1989 to provide local governance and manage its rapidly growing suburban community.
- The city has become known for its well-planned neighborhoods, highly rated schools, business parks, and abundant parks and open spaces.
- Today, Diamond Bar is recognized as an attractive residential community within the eastern Los Angeles metropolitan area, offering convenient access to both Los Angeles and Orange County.
References
- City of Diamond Bar
- U.S. Census Bureau
- Diamond Bar Golf Course
- California State Polytechnic University, Pomona
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