Area data
Diamond bar, CA — ZIP 91789
Population: 40,298 (Census ACS)
Home values & appreciation
- Median home value
- $1.15M
- 1-year appreciation
- +0.9%
- 3-year appreciation
- +12.8%
- 5-year appreciation
- +28.8%
- 10-year appreciation
- +60.5%
- All-time peak (2025-01)
- $1.16M
- House Price Index
- 417.4 (-0.8% YoY)
Market activity
- Median sale price
- $543,000
- Median list price
- $1.21M
- Median days on market
- 74.5 days
- Sale-to-list ratio
- 96.8%
- Active listings
- 9
- 1-year forecast
- +0.3%
- Days to pending
- 48 days
- New listings (monthly)
- 34
Rents
- Typical rent
- $3,550/mo
- 1-year rent change
- +4.1%
- 1BR fair-market rent
- $3,110/mo
- 3BR fair-market rent
- $4,920/mo
Affordability
- Cost of living index (High)
- 113.3 (100 = US avg)
- Electricity rate (state-level)
- 32.5¢/kWh
- Natural gas rate (state-level)
- $22.00/MCF
- 30-year mortgage rate (national)
- 6.66%
- 15-year mortgage rate (national)
- 6.00%
Schools
- Total schools
- 11
- Elementary schools
- 7
- Middle schools
- 2
- High schools
- 2
Natural hazards & flood risk
- Overall hazard risk
- Very High
- Top hazards
- earthquake, inlandFlooding, lightning, wildfire, avalanche
Climate (30-year normals)
- Average annual temperature
- 67.0°F
- Average high
- 78.0°F
- Average low
- 56.0°F
- Annual precipitation
- 9.8 in
Air quality
- Air quality rating
- Moderate
- Median AQI (annual)
- 67
- Days with Good air quality
- 41
- Days with Unhealthy air quality
- 32
Walkability & transit
- Walkability index
- 12.8 / 20
- Transit service frequency
- 707
Amenities
- National parks within ~60 mi
- 2
- Nearest national park
- Juan Bautista de Anza National Historic Trail (38 mi)
- Nearest airport
- Brackett Field (POC) (7 mi)
- Nearest major airport
- Ontario International Airport (ONT) (15 mi)
- Hospitals nearby (~15 mi)
- 55
- Avg hospital rating
- 2.6 / 5
- EV charging stations (within 10 mi)
- 630
- Solar radiation rating
- Good (5.3 kWh/m²/day)
Migration
- Net migration
- -52,940 tax filers
Housing stock
- Median year housing built
- 1,982
- Median annual property tax
- $7,343
- Mean commute to work
- 27 min
- Households with broadband internet
- 79.4%
Employment & development
- Total county employment
- 3,896,707
- Average weekly wage
- $1,512
- Top industries (by employment)
- Health Care, Accommodation & Food, Professional Services
- Annual residential building permits (county)
- 8,325
Area data compiled from public government, academic, and industry research feeds. Data sources →
Data last updated
Most recent source refresh: Aug 2026. See all data sources →