ZIP 98040 · Mercer Island
Who lives in ZIP code 98040 (Mercer Island, WA): age, income, housing, education and work.
Source: uszips 2026 (ACS-based ZIP file)
2026 ZIP profile
Mercer Island, WA · King County
uszips 2026
People25,307
Median age46.4
Household income$219,069
Home value$1,989,868
Median rent$2,502/mo
Poverty3.8%
College degree+81.5%
Commute24 min
Place
- Metro area
- Seattle-Tacoma-Bellevue, WA
- Wider region
- Seattle-Tacoma, WA
- Metro division
- Seattle-Bellevue-Kent, WA
- Time zone
- Pacific
- Density
- 1,531 / sq mi
- Housing units
- 10,068
County
Share of the ZIP's people in each county.
Age mix
22.2% are 65 or older; 78.5% are adults.
Household income
72.0% of households earn $100K+. Median per person: $89,076.
Education (adults 25+)
60.1% of degrees are in STEM fields.
Race
2.4% Hispanic or Latino (of any race).
Households & family
- Married
- 62.8%
- Never married
- 24.2%
- Divorced
- 7.5%
- Widowed
- 5.5%
- Family size
- 3.01
- Dual-income families
- 55.9%
Housing
- Own their home
- 67.0%
- Rent burden
- 29.7%
- Men / women
- 48% / 52%
Work
- In labor force
- 60.3%
- Unemployment
- 3.0%
- Self-employed
- 19.2%
- Farmers
- 0.2%
Community
- Charitable givers
- 48.8%
- Veterans
- 4.6%
- With a disability
- 9.2%
- No health insurance
- 1.2%
- Limited English
- 3.9%
Source: uszips 2026 (ACS-based ZIP file). Shares are percentages of people, households or adults as the measure implies.