ZIP code 98040: Mercer Island, WA
98040 is a ZIP code in Mercer Island, Washington, mainly in King County, part of the Seattle-Tacoma-Bellevue, WA metro area. About 25,307 people live here.
- Population
- 25,307
- Median household income
- $219,069
- Typical home value
- $2,212,700-0.8% in 12 months
- Median rent
- $2,502gross, per month
- Median age
- 46.4
- Homeowners
- 67%of occupied homes
Shaded: ZIP code 98040's area. Click anywhere on the map to see which ZIP code it's in.
ZIP codes within 10 milesWithin 25 miles
ZIP code 98040 details
| City | Mercer Island |
|---|---|
| State | Washington |
| County | King County |
| Metro area | Seattle-Tacoma-Bellevue, WA |
| Time zone | Pacific Time (UTC−8), observes daylight saving time |
| Type | Standard (delivery area) |
| Land area | 6.4 sq mi, plus 6.5 sq mi of water |
| Population density | 3,967 people per sq mi |
| Bachelor's degree or higher | 81.4% of adults 25+ |
| Average commute | 23.6 minutes |
| Center coordinates | 47.56400, -122.23121 |
Median rent in 98040 by bedrooms
| Size | Median gross rent |
|---|---|
| Studio | $2,156/mo |
| 1 bedroom | $2,261/mo |
| 2 bedrooms | $2,929/mo |
| 3 bedrooms | $3,501/mo |
| 4 bedrooms | $3,501/mo |
| 5+ bedrooms | $3,501/mo |
Gross rent includes utilities paid by the tenant. ACS 2020–2024; sizes with too few rentals to estimate are left out.
ZIP codes near 98040
| ZIP code | City | Distance | Population |
|---|---|---|---|
| 98118 | Seattle, WA | 2.3 mi | 50,500 |
| 98144 | Seattle, WA | 3.2 mi | 33,787 |
| 98009 | Bellevue, WA | 3.5 mi | — |
| 98015 | Bellevue, WA | 3.5 mi | — |
| 98006 | Bellevue, WA | 3.8 mi | 40,009 |
| 98004 | Bellevue, WA | 3.9 mi | 39,897 |
| 98108 | Seattle, WA | 4.0 mi | 25,529 |
| 98056 | Renton, WA | 4.1 mi | 35,849 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Buying a home in 98040?
A typical home in ZIP code 98040 is worth about $2,212,700 (Zillow Home Value Index). The median household here earns $219,069 a year. See what buying here would cost per month, with Washington average taxes and insurance filled in.
Monthly payment for a $2,212,700 homeWhat can a $219,069 income afford?Rental property numbers
About ZIP code 98040
What city is ZIP code 98040?
ZIP code 98040 is in Mercer Island, WA, in King County.
What county is ZIP code 98040 in?
98040 is mainly in King County, Washington.
What is the population of ZIP code 98040?
About 25,307 people live in ZIP code 98040, according to the American Community Survey 2020–2024 5-year estimates.
What time zone is ZIP code 98040 in?
98040 is in Pacific Time (UTC−8). It observes daylight saving time.