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US ZIP Code Profile

ZIP Code 98275
Mukilteo, Washington

ZIP code 98275 is in Mukilteo, located in Snohomish County, Washington, within the Seattle-Tacoma-Bellevue metro area. Its 2020 Census population was 21,642. The estimated median adjusted gross income per tax return is $89,752, and about 19% of filers report $200,000 or more.

2020 Population
21,642
Census ZCTA
County
Snohomish
FIPS 53061
Median income (est.)
$89,752
IRS SOI 2022
Land Area
7.543 mi²
+ 1.073 mi² water

01Location & Geography

Authoritative geographic identifiers from the U.S. Census Bureau, ANSI, and FIPS standards.

Primary CityMukilteo, WA
CountySnohomish County (FIPS 53061)
StateWashington (FIPS 53)
Metro Area (MSA)Seattle-Tacoma-Bellevue, WA Metro Area (42660)
Census Region / DivisionWest Region · Pacific Division
Coordinates47.916786, -122.30264
Land / Water Area7.543 mi² land · 1.073 mi² water

02Income & Economics

Distribution of the 10,870 individual tax returns filed in 98275 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
16.3%
$25K–$50K
14.2%
$50K–$75K
13.5%
$75K–$100K
10.2%
$100K–$200K
26.7%
$200K+
19.1%
The $200,000+ bracket accounts for 54% of 98275's total adjusted gross income, from 19% of returns — a concentration that drives the gap between the median ($89,752) and the average.
Estimated median = median adjusted gross income per tax return, interpolated from IRS SOI brackets. Differs from U.S. Census household income.

03Income Over Time

Year-over-year change in 98275's IRS income metrics, 2020–2022.

Median income (2021→2022)
$89,752
▲ 5.3%
Filers earning $200K+
19.1%
▲ 1.2 pt
Total filers
10,870
▼ 1.3%
GET /zipc/v2/zipcodes/98275/soi?year=… $78K 2020 $85K 2021 $90K 2022
Median = adjusted gross income per return, interpolated from IRS SOI brackets. Figures are nominal (not inflation-adjusted).

04Population Trend

Decennial U.S. Census population for the 98275 ZCTA.

2000
19,093
 
2010
20,256
▲ +6.1%
2020
21,642
▲ +6.8%

05Nearby ZIP Codes — Live Radius Search

Drag the slider to filter ZIP codes by distance from 98275. Powered by the same radius endpoint developers call from the API.

GET /zipc/v2/radius

ZIP codes within range of 98275

Mukilteo and its immediate neighbors, sorted by distance.

3 mi
GET /zipc/v2/distance

Distance from 98275 to any ZIP

Enter a 5-digit ZIP to calculate the distance.

06USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number545726
City AliasesMukilteo

07Frequently Asked Questions

What county is ZIP code 98275 in?

ZIP code 98275 is in Snohomish County, Washington (county FIPS code 53061).

What city is ZIP code 98275?

The primary USPS city for 98275 is Mukilteo, WA.

What metro area (MSA) is 98275 in?

98275 is part of the Seattle-Tacoma-Bellevue, WA Metro Area (MSA code 42660).

What is the population of ZIP code 98275?

The 2020 Census population of 98275 was 21,642 residents.

What is the median income in ZIP code 98275?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 98275 is about $89,752, with around 19% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.