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US ZIP Code Profile

ZIP Code 98029
Issaquah, Washington

ZIP code 98029 is in Issaquah, located in King County, Washington, within the Seattle-Tacoma-Bellevue metro area. Its 2020 Census population was 31,432. The estimated median adjusted gross income per tax return is $133,601, and about 35% of filers report $200,000 or more.

2020 Population
31,432
Census ZCTA
County
King
FIPS 53033
Median income (est.)
$133,601
IRS SOI 2022
Land Area
8.951 mi²
+ 0.016 mi² water

01Location & Geography

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

Primary CityIssaquah, WA
CountyKing County (FIPS 53033)
StateWashington (FIPS 53)
Metro Area (MSA)Seattle-Tacoma-Bellevue, WA Metro Area (42660)
Census Region / DivisionWest Region · Pacific Division
Coordinates47.557106, -122.00772
Land / Water Area8.951 mi² land · 0.016 mi² water

02Income & Economics

Distribution of the 14,170 individual tax returns filed in 98029 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
15.0%
$25K–$50K
10.0%
$50K–$75K
9.7%
$75K–$100K
8.0%
$100K–$200K
21.9%
$200K+
35.4%
The $200,000+ bracket accounts for 77% of 98029's total adjusted gross income, from 35% of returns — a concentration that drives the gap between the median ($133,601) 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 98029's IRS income metrics, 2020–2022.

Median income (2021→2022)
$133,601
▲ 1.1%
Filers earning $200K+
35.4%
▲ 0.5 pt
Total filers
14,170
▲ 1.9%
GET /zipc/v2/zipcodes/98029/soi?year=… $117K 2020 $132K 2021 $134K 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 98029 ZCTA.

2000
28,427
 
2010
24,348
▼ -14.3%
2020
31,432
▲ +29.1%

05Nearby ZIP Codes — Live Radius Search

Drag the slider to filter ZIP codes by distance from 98029. Powered by the same radius endpoint developers call from the API.

GET /zipc/v2/radius

ZIP codes within range of 98029

Issaquah and its immediate neighbors, sorted by distance.

3 mi
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Distance from 98029 to any ZIP

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06USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number543878
City AliasesIssaquah, Sammamish

07Frequently Asked Questions

What county is ZIP code 98029 in?

ZIP code 98029 is in King County, Washington (county FIPS code 53033).

What city is ZIP code 98029?

The primary USPS city for 98029 is Issaquah, WA.

What metro area (MSA) is 98029 in?

98029 is part of the Seattle-Tacoma-Bellevue, WA Metro Area (MSA code 42660).

What is the population of ZIP code 98029?

The 2020 Census population of 98029 was 31,432 residents.

What is the median income in ZIP code 98029?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 98029 is about $133,601, with around 35% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.