Unlock more jurisdiction sub-pages
Subscribe for full sub-page depth, saves, alerts, and exports.
Blackhawk
City in California, United States
Overview
Blackhawk, California is an affluent unincorporated community in Contra Costa County, set at the base of Mount Diablo. Known for its gated neighborhoods, luxury amenities, and scenic beauty, Blackhawk offers a tranquil suburban experience just east of San Francisco.
Geographic Context
Jurisdiction
United States
State
California
Population
—
Time Zone
America/Los_Angeles
Coordinates
37.82°, -121.91°
Key Metrics
Safety Score · estimate
95
Female Safety
92
LGBTQ+ Safety
90
Traffic Safety
80
Food Safety
100
Monthly Cost · estimate
$5,115
Local Cost
$3,830
Local Income
$11,500
Cashless
97
English
100
Temperature
14.7°C
Summer Avg
20.2°C
Winter Avg
8.7°C
Record High
45.2°C
Record Low
-4.9°C
Humidity
70%
Precipitation
467 mm
Internet Speed
394 Mbps
Upload
99 Mbps
Latency
13 ms
City Vibrancy
—
Coworking
0
Cafes
0
Nightlife
0
Parks
0
Transport
3
Walk Score
3
Footways
5.0
Airport
LVK
Distance
16 km
Explore
Data sources
Source-backed data
World Air Quality Index - Latest available city-level air quality station measurement. Record updated 2025-12-05.
OpenStreetMap - Nearby amenities counted from OpenStreetMap-derived city extracts. Record updated 2025-12-09.
OpenStreetMap transport extract - Walkability, footway density, and airport access metrics derived from mapped transport features. Record updated 2025-12-06.
Estimates and unverified origins
Oyster List climate data - Climate origins are unverified. Available methods include historical APIs and AI estimates; stored rows do not identify the original dataset, reference period, or model for each value. Treat these summaries as estimates until independently verified. Record updated 2026-03-23.
Oyster List city price estimates - Price origins are unverified. Available generation methods include AI estimates; stored records do not identify a survey, observation period, or model for each price. Record updated 2026-01-14.
Oyster List AI-assisted estimates - Safety, lifestyle, income, and practical scores include model-assisted estimates. Stored records do not identify supporting observations for each score. Model-reported confidence: 82/100; this is not a measured accuracy score. Model: derived+gpt-4.1. Record updated 2026-03-26.
Subscribe to unlock more jurisdiction sub-pages this month.
You can keep discovering Oyster publicly, but full multi-jurisdiction depth, tracking, alerts, and exports are part of paid access.