Diamond Bar
City in California, United States
Overview
Diamond Bar is a peaceful suburban city in eastern Los Angeles County known for its well-manicured neighborhoods, top-rated schools, and scenic parks. Its convenient location offers a tranquil atmosphere within easy reach of both Los Angeles and Orange County attractions.
Geographic Context
Jurisdiction
United States
State
California
Population
55,072
Time Zone
America/Los_Angeles
Coordinates
34.03°, -117.81°
Key Metrics
Safety Score
77
Female Safety
78
LGBTQ+ Safety
80
Traffic Safety
72
Food Safety
95
Monthly Cost
$3,415
Local Cost
$2,570
Local Income
$4,600
Cashless
94
English
98
Temperature
17.4°C
Summer Avg
24.4°C
Winter Avg
10.5°C
Record High
45.3°C
Record Low
-4.3°C
Humidity
50%
Precipitation
289 mm
Internet Speed
264 Mbps
Upload
188 Mbps
Latency
8 ms
City Vibrancy
4
Coworking
0
Cafes
2
Nightlife
0
Parks
2
Transport
0
Walk Score
0
Footways
—
Airport
POC
Distance
7 km
Explore
Frequently Asked Questions
Data sources
Source-backed data
NASA POWER - Climate normals and monthly weather measurements rendered as city weather metrics. Updated 2026-03-22.
World Air Quality Index - Latest available city-level air quality station measurement. Updated 2025-12-05.
Ookla Open Data - Internet speed aggregates for 2024Q3 from 62 tests. Updated 2025-12-05.
OpenStreetMap - Nearby amenities counted from OpenStreetMap-derived city extracts. Updated 2025-12-06.
OpenStreetMap transport extract - Walkability, footway density, and airport access metrics derived from mapped transport features. Updated 2025-12-05.
Oyster List city price model - City price estimates calibrated from local price surveys and jurisdiction-level cost signals. Updated 2026-01-14.
Estimated data
Oyster List AI-assisted estimates - Safety, lifestyle, income, and practical scores are model-assisted estimates derived from source-backed country and city signals. Confidence 85/100.