Mercer Island, Washington · ZIP 98040

Mercer Island — ZIP 98040

Mercer Island (98040) scores 93/100 — Excellent for Washington. Safety: Lower reported-crime rate under the available data tier. Schools: Higher reported proficiency and grade-band coverage. A premium market - pricier than most of the state. The typical home value here is $2.33M.

Overall NeighborScore

AExcellent

Tap a tab to compare 98040 against its city, state, or the nation.

Lower reported-crime rate under the available data tier.

Safety index95/100

Violent crime share7%

Property crime share93%

Higher reported proficiency and grade-band coverage.

School index90/100

Avg math proficiency82%

Avg reading proficiency86%

Schools nearby6

A premium market - pricier than most of the state.

Affordability index17/100

Typical home value$2.33M

Median rent$2,654/mo

How this score is calculated: the NeighborScore composite weights crime 53% and schools 47%, each normalized to the local area. Home affordability is shown for context and is not factored into the overall score. Sources & methodology →

Last refreshed — Schools: Aug 2026 · Real estate: Aug 2026 · Demographics: Jun 2026

Nearby Neighborhoods

Not the right fit? See how adjacent ZIPs score — tap to jump over.

Seattle, WashingtonSeattleZIP 98118

41▼52 vs here

Bellevue, WashingtonBellevueZIP 98006

76▼17 vs here

Seattle, WashingtonSeattleZIP 98144

45▼48 vs here

Bellevue, WashingtonBellevueZIP 98004

73▼20 vs here

Real Estate Snapshot

Typical Home Value

$2.33M

Median Rent

$2,654/mo

Days on Market

—

Sale-to-List

—

Typical Home Value — 23 Months

Median Rent — 24 Months

Crime Overview

Total Incidents

70,251

Violent Crime

8,019

Property Crime

62,232

Crime statistics for this area are estimated from FBI-reported county-level data for King County, Washington (2025). This ZIP does not yet have city-specific monthly crime data, so figures reflect the entire county rather than this ZIP alone.

Full Crime Report →

Nearby Schools

	Grades
Island Park Elementary	KG–05	364	87%	92%
Lakeridge Elementary School	KG–05	401	85%	88%
West Mercer Elementary	KG–05	431	83%	86%
Mercer Island High School	09–12	1,439	82%	94%
Northwood Elementary School	PK–05	398	77%	77%
Islander Middle School	06–08	960	76%	80%

Directory and latest enrollment: NCES Common Core of Data (SY 2024–25 where reported). Proficiency: U.S. Department of Education EDFacts SY 2021–22; state standards are not directly comparable.

Full School Report →

Demographics

Population

25,282

Median Income

$219K

Homeownership

67%

Median Age

46.4 yrs

Source: US Census Bureau ACS 5-Year Estimates (2024).

Map

Guides Featuring ZIP 98040

City ComparisonsJuly 1, 2026By Sharon Ben-Moshe

Mercer Island vs Sammamish: Comparing Seattle's Top Suburbs

Mercer Island and Sammamish both post elite NeighborScore composites, but the data splits once you factor in price, affordability, and per-ZIP school scores. Here is how three King County ZIP codes actually compare, number by number.

School RankingsJuly 1, 2026By Sharon Ben-Moshe

Seattle-Area ZIP Codes With the Best School Scores (2026)

Sammamish, Mercer Island, and Bellevue ZIP codes post the highest school scores in the Seattle metro, backed by NCES proficiency data. See how six Eastside ZIPs rank and what the scores mean for families house-hunting by school quality.

Frequently Asked Questions

ZIP 98040 has a reported-crime score of 95/100. A higher score represents a lower reported-crime rate under the best available data tier for this ZIP; it is not a guarantee of safety. Review the crime report and current local police data before making a decision.

ZIP 98040 has a school score of 90/100. The index combines reported SY 2021–22 math and reading proficiency with grade-band coverage. Nearby or county-level estimates may be used where ZIP-level reporting is sparse, and state assessment standards are not directly comparable.

The latest home value or sale-price figure available for ZIP 98040 is approximately $2.33M. The profile identifies the underlying source; Zillow ZHVI is a typical home value measure, while Redfin data is a median sale-price measure. These are different metrics and may lag current listings.

ZIP 98040 in Mercer Island has an overall NeighborScore of 93/100. It combines the crime score (53%) and school score (47%); affordability is context only. Use the component data and its coverage notes rather than treating the composite as a complete measure of livability.