City safety & data profile

Mercer IslandWA

Mercer Island, WA is a 25K-resident city in King County with a median household income of $219,069.

King County, Washington. Federal health, economic, and safety indicators for Mercer Island, drawn from the U.S. Census Bureau American Community Survey, CDC PLACES, and CMS Hospital Compare. Mercer Island has a population larger than 56% of the 4,640 U.S. cities Areazine tracks, and a median home value of $2,000,000+.

Data updated 2026-07-18

25K
Population
Top 44%
By size
$219,069
Median income
$2,000,000+
Median home
3.8%
Poverty rate

The read on Mercer Island

Mercer Island posts a median household income higher than 99% of U.S. cities Areazine tracks.

Top 1%
by median income, US cities

Where Mercer Island income ranks nationally

Median household income vs. every place Areazine profiles (place-level ACS)

$219,069 Top 1% higher than 99% of 3,889 places Areazine profiles

$0–$20,000: 0 places Areazine profiles (0%). Below this entry. $20,000–$40,000: 71 places Areazine profiles (2%). Below this entry. $40,000–$60,000: 788 places Areazine profiles (20%). Below this entry. $60,000–$80,000: 1,055 places Areazine profiles (27%). Below this entry. $80,000–$100,000: 768 places Areazine profiles (20%). Below this entry. $100,000–$120,000: 515 places Areazine profiles (13%). Below this entry. $120,000–$140,000: 308 places Areazine profiles (8%). Below this entry. $140,000–$160,000: 171 places Areazine profiles (4%). Below this entry. $160,000–$180,000: 92 places Areazine profiles (2%). Below this entry. $180,000–$200,000: 47 places Areazine profiles (1%). Below this entry. $200,000–$220,000: 28 places Areazine profiles (1%). This entry sits in this band. $220,000–$240,000: 18 places Areazine profiles (0%). Above this entry. $240,000–$260,000: 28 places Areazine profiles (1%). Above this entry. WA $0 $260,000 every profiled place, bucketed by value

Each bar is a $20K-wide band; taller bars hold more places Areazine profiles. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau, American Community Survey (place-level) · 2024 ACS 5-year

The quick read

Reading Mercer Island, WA beyond the headline numbers

Mercer Island sits inside King County, Washington, at roughly 47.57°N, -122.22°W. Population 25,042, $219,069 median household income. Median home value $2,000,000+, median rent $2,502. Poverty rate 3.8%, read against that income figure since two cities on the same median can differ underneath it.

CDC PLACES: Mercer Island's highest-prevalence health measure is high blood pressure at 29%, then short sleep duration at 25.5%.

Sources: U.S. Census ACS, CDC PLACES, CMS Hospital Compare, plus live alerts for Mercer Island from FEMA, NOAA, FDA, and CPSC. Comparison bars benchmark each metric against the national reference.

Population
25,042
Mercer Island
Median Income
$219,069
+222% vs avg
Median Home Value
$2,000,000+
+778% vs avg
Median Age
46.4
years

10-Year Trends 2013–2024

County-level trend (King County) - Mercer Island's own historical series isn't separately published by the Census Bureau, so these year-over-year figures track the surrounding county, not the city alone.

20132024
Population
2.3M+16%
Median Income
$124,746+74%
Median Home Value
$859,900+128%
Poverty Rate
8.6%-25%
Unemployment
4.8%-38%

Economics

Economics indicators for Mercer Island, WA
IndicatorValue
Median Rent
$2,502/mo
Poverty Rate
3.8% -73% vs avg
Unemployment 3%
Bachelor's Degree+ 81.4%
Work From Home 38.6%
Public Transit 3.1%

Population

White 63.6%
African American 0.9%
Asian 24.5%
Two or More Ethnicities 8.6%

Health Profile 15 measures

Health Indicators

High Blood Pressure
29%
Short Sleep Duration
25.5%
Obesity
19.6%
Binge Drinking
15.3%
Frequent Mental Distress
11.6%
Physical Inactivity
11.5%
Current Asthma
9.2%
Frequent Physical Distress
8.8%
Diabetes
7.4%
Current Smoking
4.9%

Preventive Care

Dental Visit 78.2%
Annual Checkup 74.8%

Other Measures

Coronary Heart Disease
4.6%
Lack of Health Insurance
4%
Stroke
2.4%

Frequently Asked Questions 5

What is the population of Mercer Island, WA? ▼
Mercer Island, WA has a population of 25,042 people, located in King County, Washington.
What is the median household income in Mercer Island? ▼
The median household income in Mercer Island, WA is $219,069 per year, per the U.S. Census ACS. The poverty rate is 3.8%.
What is the median home value in Mercer Island? ▼
The median home value in Mercer Island, WA is $2,000,000+. Median rent is $2,502/month.
What are the top health concerns in Mercer Island? ▼
The top health indicators in Mercer Island include High Blood Pressure (29%), Short Sleep Duration (25.5%), Obesity (19.6%). Data from CDC PLACES.
What is the median age in Mercer Island? ▼
The median age in Mercer Island, WA is 46.4 years. 81.4% of residents have a bachelor's degree or higher.

Safety Context

Mercer Island, WA is located in King County, Washington. With a population of 25K and a $219,069 median household income, the community faces health challenges including high blood pressure and short sleep duration. Safety alerts for the Mercer Island area are monitored from federal and state agencies including FEMA, NOAA, FDA, and CPSC.

Safety Guides

How Product Recalls Work

CPSC, FDA & NHTSA recall process explained

Understanding Weather Alerts

Watch vs warning vs advisory explained

Earthquake Magnitude Explained

What the numbers mean & when to act
All safety guides →

Primary source data

EPA Outdoor Air Quality Data

Federal monitoring network, every measurement we report

AirNow - Washington

Real-time AQI for every monitored Washington location

National Weather Service

NOAA active watches, warnings, advisories

CDC Air Quality & Health

Health-impact reference for every AQI category

EPA NAAQS standards

National Ambient Air Quality Standards, the regulatory thresholds

Nearby Cities 8

Bellevue, WA 140K Columbia City, WA 19K Newcastle, WA 11K Bryn Mawr-Skyway, WA 16K Renton, WA 100K Tukwila, WA 20K Kirkland, WA 87K Seattle, WA 781K
All cities in Washington → Compare Mercer Island vs Bellevue → All comparisons → Browse all cities

Using Mercer Island's profile

Use this as a starting research checklist, not a verdict on whether to live here.

  • Check live recalls, weather and hazard alerts scoped to the Mercer Island area before relying on national headlines. Check your area
  • Read the poverty rate alongside the income figure, two places with the same median can have very different realities.
  • Compare Mercer Island against Washington peers on any ranking lens. Explore Washington

Population and economics (income, home value, poverty, education) are place-level U.S. Census ACS; health is CDC PLACES; hospital counts reflect facilities in and around the city.

Data Sources

All data on this page comes from official U.S. government sources. Population and economic data from the Census Bureau American Community Survey (2024 5-year estimates, place geography). Health data from the CDC PLACES program (2023). Hospital ratings from CMS Hospital Compare (2024). Climate data from NOAA. Education data from NCES. Cost of living from Bureau of Economic Analysis. Crime statistics, where referenced on Areazine, originate from the FBI Crime Data Explorer. Housing market figures referenced on Areazine come from HUD Fair Market Rents. Census economics and population are at place geography; some health and hospital indicators are reported at the county level (King County) where that is the smallest published unit.

Every figure on Areazine is published directly from official U.S. government sources, no number is typed in by an editor. City demographic and health figures are compiled directly from U.S. Census, CDC, and CMS releases, updated quarterly within 30 days of upstream release. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2026.