PlainZIP

Mercer Island, WA

Single-footprint Census roll-up for Mercer Island, WA: 1 USPS ZIP, population 22,699. Open the primary ZIP for household income, housing tenure, and commute from ACS 2023 5-Year Estimates.

U.S. Census Bureau, SimpleMaps US ZIP Code Database, delivery-area ZIP coverage

ACS city ledger plate

Sheet MERCER-ISLAND-WA · Mercer Island, WA 1 ZIPs · 22,699 pop · #173/25278 · King County

INC-TOP · RANK-TOP · BELOW-PEER · BOOK-ONE · OWN-MID · POP-TOWN · SPREAD-UNK · HOME-TOP

  • INC-TOP $219,069
  • RANK-TOP #173/25278
  • BELOW-PEER under Sammamish
  • BOOK-ONE 1 ZIP
  • OWN-MID 67% owners
  • POP-TOWN 22,699
  • SPREAD-UNK Single-ZIP book
  • HOME-TOP $2,000,001

Nearest income peer: Sammamish, WA (+ $28,113 income $)

Instrument codes from this city’s ACS household income, national rank, county-peer gap, ZIP book, owner tenure, population scale, intra-city income spread, and home-value band, not a moving recommendation.

Income neighbourhood around Mercer Island

Lowest/highest poles plus county-sharing cities nearest Mercer Island on average ZIP median household income. Full ladder: /cities.

median HH income

What this shows County-sharing peers only, not the full US city board. Open a near peer when the gap is small; open the poles when the mosaic is wide.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2026-08-25

National city placement

According to ACS 5-Year Estimates, Mercer Island, WA sits among US cities with a top-decile household income, on a town-scale population base, across a single-ZIP footprint.

Top 1%
household income vs 25,278 US cities
22,699
city population (Census)
1
USPS ZIP codes covered
$219,069
avg ZIP median income

Income percentile ranks this city's average ZIP median household income against 25,278 US cities with ACS income on at least one ZIP. Scale and ZIP-spread words come from Census population and USPS ZIP coverage.

High-income footprint on only 1 ZIP: the city page and the ZIP page nearly coincide. Headline income $219,069 and home value $2,000,000+ should be read as near-neighborhood numbers ; bachelor's attainment averages 81.4%.

Owner-occupancy sits in a mixed band (67.0%) - check the ZIP page's tenure split before treating Mercer Island as a pure owner town.

Within Washington, Snoqualmie is the closest lower-income city and Ronald the closest higher-income city by average ZIP household income. Their 1 and 1 ZIP footprints are the immediate statewide comparison set for Mercer Island.

Population concentration

Mercer Island's single ZIP 98040 carries the town

Mercer Island is published as a single USPS ZIP. Code 98040 is the entire residential footprint (22,699 ACS residents), so the city page and the ZIP page tell the same household story, open that ZIP for income, tenure, and commute detail.

Census ZBP business roll-up

Dense ZBP book packed into Mercer Island's one ZIP

Citywide ZBP: 830 establishments, 7,524 employees , annual payroll $466,919k (~37 establishments per 1,000 residents) across 1 of 1 ZIPs. Peak business ZIP 98040 (830 units) ; leading NAICS Professional, scientific, and technical services (182) · also Real estate and rental and leasing · Health care and social assistance .

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ZIP Codes in Mercer Island, WA

These ZIP codes sit in King County, which covers 85 ZIP codes in all; 1 of them fall in Mercer Island. See the King County roll-up →

Mercer Island sits in the upper half of King County on income: Seattle, Kent and Renton report less, while Sammamish reports more. Federal Way marks the far end of that range at $90,106, 59% below Mercer Island.

ZIP Code Population Median income Establishments Density
98040 22,699 $219,069 830 1,373
How we build city roll-ups · Guide: reading ZIP code data · BLS wages

Mercer Island roll-ups here are for informational purposes only and do not constitute financial or relocation advice. ACS and Census ZBP figures are estimates; confirm the current table against Census before a money or move decision involving Mercer Island, .