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Mercer Island
City in Washington, United States
Overview
Mercer Island is an affluent suburban city located on an island in Lake Washington, between Seattle and Bellevue. It offers scenic parks, quiet neighborhoods, and convenient proximity to urban amenities, making it popular for families and professionals.
Geographic Context
Jurisdiction
United States
State
Washington
Population
25,748
Time Zone
America/Los_Angeles
Coordinates
47.57°, -122.22°
Key Metrics
Safety Score · estimate
95
Female Safety
90
LGBTQ+ Safety
90
Traffic Safety
85
Food Safety
100
Monthly Cost · estimate
$4,005
Local Cost
$2,740
Local Income
$7,500
Cashless
95
English
100
Temperature
10.5°C
Summer Avg
17.2°C
Winter Avg
4.3°C
Record High
38.0°C
Record Low
-10.4°C
Humidity
83%
Precipitation
1231 mm
Internet Speed
281 Mbps
Upload
95 Mbps
Latency
10 ms
City Vibrancy
16
Coworking
0
Cafes
3
Nightlife
0
Parks
13
Transport
0
Walk Score
0
Footways
—
Airport
BFI
Distance
8 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 2025-12-06.
OpenStreetMap transport extract - Walkability, footway density, and airport access metrics derived from mapped transport features. Record updated 2025-12-05.
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 2026-03-22.
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: 85/100; this is not a measured accuracy score. Model: derived+gpt-4.1. Record updated 2026-03-26.
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