The Town FilesDiamond Bar, California
City in Los Angeles County · population 55,072 (2020 Census)
- Median home
- $902,200
- Household income
- $108,281
- Jan low / Jul high
- 43° / 90°
- Snow a year
- 0 in
- Tornadoes ≤10 mi since 1950
- 7
- Median age
- 45.7
Diamond Bar is a city of 55,072 people in Los Angeles County, California. The median home is worth $902,200, above the typical California town ($596,900). It ranks better for young professionals than 82% of California towns, more upscale than 81% of California towns, better for families than 79% of California towns.
How Diamond Bar ranks
Percentile among California towns with at least 500 people on The Town Files lifestyle rankings. 50 is typical for the state; 90 means better than 90% of California towns.
Homes and cost of living
The median home in Diamond Bar is worth $902,200, above the typical California town ($596,900). Homes cost about 8.3 times the median household income of $108,281, which is more affordable than 23% of California towns. Median rent is $2,521 a month. 77.3% of households own their home.
| Housing | Diamond Bar | Typical California town |
|---|---|---|
| Median home value | $902,200 | $596,900 |
| Median rent | $2,521 | $1,827 |
| Median household income | $108,281 | $91,557 |
| Home value ÷ income | 8.3× | 6.4× |
| Homeownership | 77.3% | 67.4% |
| Median year built | 1980 | 1977 |
| Seasonal / vacation homes | 0.4% | — |
Who lives in Diamond Bar
| People | Diamond Bar | Typical California town |
|---|---|---|
| Median age | 45.7 | 40.2 |
| Age 65 and over | 21.0% | 17.7% |
| Under 18 | 19.0% | — |
| Bachelor's degree or higher | 52.8% | 27.7% |
| Below the poverty line | 10.0% | 10.3% |
| Veterans | 2.5% | — |
| Born outside the U.S. | 47.3% | — |
| Work from home | 18.4% | 13.4% |
| Average commute | 33.3 min | 27.5 min |
| Homes with broadband | 96.0% | 93.3% |
Weather in Diamond Bar
July highs average 90.3°F and January lows 43.1°F. About 14.5 inches of rain and melted snow fall a year, with 0.0 inches of snow (typical California town: 0.0 in). Expect about 71 days a year at 90°F or hotter and 3 nights at or below freezing.
Tornadoes, storms and disasters
7 tornadoes have passed within 10 miles of Diamond Bar since 1950, compared with 2 for the typical California town. The strongest, an F1, struck on March 16, 1977 about 8.4 miles from the town center. The most recent was on December 21, 2001.
Hail of 1 inch or larger has been reported within 10 miles 1 times; the largest was 1.50 inches on March 1, 2014.
Severe weather in Los Angeles County since 1996
Los Angeles County has been included in 88 federal disaster or emergency declarations since 1953, most often for fire, flood, freezing.
| Declared | Incident | Declaration |
|---|---|---|
| August 8, 2025 | Fire | FM-5605: Canyon Fire |
| January 8, 2025 | Fire | DR-4856: Wildfires And Straight-Line Winds |
| January 8, 2025 | Fire | FM-5550: Eaton Fire |
| January 8, 2025 | Fire | FM-5551: Hurst Fire |
| January 7, 2025 | Fire | FM-5549: Palisades Fire |
Jobs and pay in Los Angeles County
Los Angeles County had 4,525,711 jobs in 2024, paying an average of $83,554 a year. Unemployment was 5% in 2023; in Diamond Bar itself the ACS puts it at 4.9%.
Public schools in Diamond Bar
10 public schools with 8,226 students, about 25.5 students per teacher.
| School | Grades | Students | Per teacher |
|---|---|---|---|
| Diamond Bar High | 9-12 | 2,532 | 25.6 |
| Chaparral Middle | 6-8 | 1,204 | 26.8 |
| Quail Summit Elementary | K-5 | 718 | 26.6 |
| Evergreen Elementary | K-5 | 717 | 25.6 |
| Castle Rock Elementary | K-5 | 691 | 26.6 |
| Lorbeer Middle | 7-8 | 676 | 23.3 |
| Maple Hill Elementary | K-5 | 561 | 28.1 |
| Pantera Elementary | K-6 | 484 | 24.2 |
| Golden Springs Elementary | K-6 | 394 | 24.6 |
| Armstrong Elementary | K-6 | 249 | 20.8 |
Towns near Diamond Bar
- Walnut, CA3.3 mi · 28,430 people · home $1,014,000
- Rowland Heights, CA4.7 mi · 48,231 people · home $851,300
- South San Jose Hills, CA5.0 mi · 19,855 people · home $544,400
- Pomona, CA5.1 mi · 151,713 people · home $593,800
- Brea, CA5.9 mi · 47,325 people · home $922,300
- West Covina, CA6.5 mi · 109,501 people · home $779,800
- Chino Hills, CA6.6 mi · 78,411 people · home $874,900
- Valinda, CA7.0 mi · 22,437 people · home $636,700
Diamond Bar questions
Is Diamond Bar, California a good place to retire?
On The Town Files lifestyle rankings, Diamond Bar scores better for retirees than 52% of California towns and quieter than 42%. 21.0% of residents are 65 or older (median age 45.7).
How much does a house cost in Diamond Bar?
The median owner-occupied home in Diamond Bar is valued at $902,200 (Census ACS 2020–2024), against a median household income of $108,281, so homes cost about 8.3 times income. Median rent is $2,521 a month.
What is the weather like in Diamond Bar?
July highs average 90.3°F and January lows 43.1°F (NOAA 1991–2020 normals). It gets about 14.5 inches of precipitation a year and 0.0 inches of snow.
Does Diamond Bar get tornadoes?
7 tornadoes have passed within 10 miles of Diamond Bar since 1950 (NOAA Storm Events); the strongest was a F1 on March 16, 1977. The typical California town has had 2.
- U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024)
- U.S. Census Bureau, 2020 Census and 2025 Gazetteer (2020 / 2025)
- NOAA NCEI U.S. Climate Normals (1991–2020)
- NOAA NCEI Storm Events Database (1950–2026)
- FEMA OpenFEMA Disaster Declarations (this product uses the FEMA OpenFEMA API but is not endorsed by FEMA) (1953–2026)
- NCES Common Core of Data (2023–24)
- BLS Quarterly Census of Employment and Wages; USDA ERS county unemployment (BLS LAUS) (2000–2024)
- The Town Files lifestyle rankings, built from federal demographic, school, crime and housing data (2025)