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
95
Female Safety
90
LGBTQ+ Safety
90
Traffic Safety
85
Food Safety
100
Monthly Cost
$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
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 4 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.