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Mercer Island city, WA

ZIP 98040 — People & Community

Source: U.S. Census Bureau ACS 2019–2023 5-Year Estimates. Page data updated 2026-08-02.

Wealthy AreaLow Snow AreaRemote Work Hub

Demographics, education attainment, health access, and community lifestyle

Population & Demographics in 98040

98040 has a population of 25,282 with a median age of 45.8 yrs (46.5% male).

Race & Ethnicity
White
65.7%+7% vs US avg
x
Black
1.4%-88% vs US avg
x
Asian
22.3%+279% vs US avg
x
Hispanic
2.3%-88% vs US avg
x
Other / Two+
8.2%
x
Age Groups
0–17
22.1%+0% vs US avg
x
18–64
56.9%-8% vs US avg
x
65+
21.0%+29% vs US avg
x
Education
Less than HS
1.9%-83% vs US avg
x
High school
5.3%-80% vs US avg
x
Some college
14.0%-52% vs US avg
x
Bachelor's+
78.8%+134% vs US avg
x
Marital Status
Married
64.5%+34% vs US avg
x
Never married
22.4%-34% vs US avg
x
Divorced
7.8%-24% vs US avg
x
Widowed / Separated
5.3%
x
Diversity Index
51/100

Higher = more diverse (Simpson index from race/ethnicity)

Social & household profile

Poverty, nativity, veterans, disability, family structure, and births (ACS).

Poverty Rate
4.6%-60% vs US avg
x
Foreign Born
31.6%+127% vs US avg
x
Veterans
4.6%-24% vs US avg
x
Disability
9.7%-28% vs US avg
x
Single Parent
3.1%-61% vs US avg
x
Recent Births
29.9%+415% vs US avg
x
Top ancestry
EnglishGermanIrish

Health & Community Indicators in 98040

Poverty Rate
4.6%-60% vs US avg
x
Veterans
4.6%-24% vs US avg
x
Foreign Born
31.6%+127% vs US avg
x
Single Parent
3.1%-61% vs US avg
x
Disability
9.7%-28% vs US avg
x
Uninsured
1.6%-80% vs US avg
x
SNAP Benefits
1.6%-86% vs US avg
x
Private School
0.7%-93% vs US avg
x
Recent Births
29.9%+415% vs US avg
x
Smartphone Only
0.0%
x

People & Community key statistics

Population statistics
Population
Population25,282
Median age45.8
Poverty rate4.6%
Demographics statistics
Demographics
White65.7%
Hispanic2.3%
Black1.4%
Asian22.3%
Foreign-born31.6%