ZIP code 98040
Where is ZIP code 98040?
Mercer Island, Washington
King County · Standard ZIP code
ZIP code 98040 belongs to Mercer Island, Washington in King County. 98040 is a standard ZIP code, so it covers street addresses as well as PO Boxes. It is in the Pacific Time zone and uses area codes 206 and 425. About 25,307 people live in the 98040 area, where the median household income is $219,069. The closest ZIP codes are 98118 (Seattle, 2.6 mi southwest), 98006 (Bellevue, 3.4 mi east) and 98009 (Bellevue, 3.7 mi north).
| ZIP code | 98040 |
|---|---|
| Type | Standard ZIP code for street addresses and PO Boxes |
| Status | Active |
| City | Mercer Island |
| State | Washington (WA) |
| County | King County |
| Time zone | Pacific Time · now |
| Area codes | 206, 425 |
| Coordinates | 47.5603, -122.2281 map |
| 3-digit prefix | 980 |
Population and income in 98040
| Population | 25,307 · higher than 77% of Washington ZIP codes |
|---|---|
| People per square mile | 3,965 · higher than 87% of Washington ZIP codes |
| Median age | 46.4 years · higher than 68% of Washington ZIP codes |
| Men / women | 48% / 52% |
| Median household income | $219,069 · higher than 99% of Washington ZIP codes |
| Income per person | $128,615 |
| Below the poverty line | 3.8% |
| Bachelor’s degree or higher | 81% of adults 25+ |
| Median home value | $2,000,001 · higher than 100% of Washington ZIP codes |
| Median rent | $2,502 a month |
| Housing units | 10,609 |
| Households | 10,068 (2.5 people on average) |
| Owners / renters | 67% / 33% |
| Land area | 6.38 sq mi (plus 6.52 sq mi of water) |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 98040. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 98040
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 98118 | Seattle, WA | 2.6 mi SW | Standard |
| 98006 | Bellevue, WA | 3.4 mi E | Standard |
| 98009 | Bellevue, WA | 3.7 mi N | PO Box only |
| 98015 | Bellevue, WA | 3.7 mi N | PO Box only |
| 98144 | Seattle, WA | 3.8 mi NW | Standard |
| 98004 | Bellevue, WA | 3.9 mi N | Standard |
| 98108 | Seattle, WA | 4.2 mi W | Standard |
| 98056 | Renton, WA | 4.2 mi SE | Standard |
| 98039 | Medina, WA | 4.6 mi N | Standard |
| 98178 | Seattle, WA | 4.7 mi S | Standard |
| 98005 | Bellevue, WA | 4.8 mi NE | Standard |
| 98134 | Seattle, WA | 5 mi NW | Standard |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 98040 or measure the distance to another ZIP code.
How to address mail to 98040
123 MAIN ST
MERCER ISLAND WA 98040
Put the city, the two-letter state code and the ZIP code on the last line. Adding the 4-digit ZIP+4 code (98040-XXXX) helps mail sort faster but isn’t required.
Questions
- What city is ZIP code 98040?
- 98040 is a Mercer Island, Washington ZIP code.
- What county is 98040 in?
- ZIP code 98040 is in King County, Washington.
- What time zone is ZIP code 98040 in?
- 98040 is in the Pacific Time zone (America/Los_Angeles).
- What area code is 98040?
- Phone numbers in ZIP code 98040 use area codes 206 and 425.
- What is the population of ZIP code 98040?
- About 25,307 people live in ZIP code 98040, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 98040?
- The median household income in 98040 is $219,069 a year, higher than 99% of Washington ZIP codes.
- What ZIP codes are near 98040?
- The nearest ZIP codes to 98040 are 98118 (Seattle, 2.6 miles), 98006 (Bellevue, 3.4 miles), 98009 (Bellevue, 3.7 miles) and 98015 (Bellevue, 3.7 miles).