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US ZIP Code Profile

ZIP Code 98043
Mountlake Terrace, Washington

ZIP code 98043 is in Mountlake Terrace, located in Snohomish County, Washington, within the Seattle-Tacoma-Bellevue metro area. Its 2020 Census population was 21,285. The estimated median adjusted gross income per tax return is $64,977, and about 8% of filers report $200,000 or more.

2020 Population
21,285
Census ZCTA
County
Snohomish
FIPS 53061
Median income (est.)
$64,977
IRS SOI 2022
Land Area
4.084 mi²
+ 0.105 mi² water

01Location & Geography

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

Primary CityMountlake Terrace, WA
CountySnohomish County (FIPS 53061)
StateWashington (FIPS 53)
Metro Area (MSA)Seattle-Tacoma-Bellevue, WA Metro Area (42660)
Census Region / DivisionWest Region · Pacific Division
Coordinates47.79111, -122.30779
Land / Water Area4.084 mi² land · 0.105 mi² water

02Income & Economics

Distribution of the 11,360 individual tax returns filed in 98043 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
18.8%
$25K–$50K
19.7%
$50K–$75K
19.1%
$75K–$100K
12.8%
$100K–$200K
21.8%
$200K+
7.8%
The $200,000+ bracket accounts for 30% of 98043's total adjusted gross income, from 8% of returns — a concentration that drives the gap between the median ($64,977) 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 98043's IRS income metrics, 2020–2022.

Median income (2021→2022)
$64,977
▲ 6.0%
Filers earning $200K+
7.8%
▲ 1.3 pt
Total filers
11,360
▲ 0.9%
GET /zipc/v2/zipcodes/98043/soi?year=… $55K 2020 $61K 2021 $65K 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 98043 ZCTA.

2000
20,333
 
2010
19,943
▼ -1.9%
2020
21,285
▲ +6.7%

05Nearby ZIP Codes — Live Radius Search

Drag the slider to filter ZIP codes by distance from 98043. Powered by the same radius endpoint developers call from the API.

GET /zipc/v2/radius

ZIP codes within range of 98043

Mountlake Terrace and its immediate neighbors, sorted by distance.

3 mi
GET /zipc/v2/distance

Distance from 98043 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 Number545690
City AliasesMountlake Terrace, Mountlake Ter

07Frequently Asked Questions

What county is ZIP code 98043 in?

ZIP code 98043 is in Snohomish County, Washington (county FIPS code 53061).

What city is ZIP code 98043?

The primary USPS city for 98043 is Mountlake Terrace, WA.

What metro area (MSA) is 98043 in?

98043 is part of the Seattle-Tacoma-Bellevue, WA Metro Area (MSA code 42660).

What is the population of ZIP code 98043?

The 2020 Census population of 98043 was 21,285 residents.

What is the median income in ZIP code 98043?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 98043 is about $64,977, with around 8% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.