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City ZIP codes · Washington

Issaquah, WA ZIP Codes

2 ZIP codes use the postal name Issaquah, Washington (Census 2020 ZCTAs and GeoNames postal codes, October 2026), all residential. Median household income runs from $153,301 in 98027 to $170,759 in 98029 (Census Bureau, ACS 2020-2024). Issaquah's most populous ZIP code is 98029, with 30,586 people (ACS 2020-2024); 39% of its land is in the city of Issaquah.

  • ACS2020-24
  • Census2020
  • GeoNames2026

Where are Issaquah's ZIP codes?

98027: $153k median household income98029: $171k median household income980279802998027: $153k median household income98029: $171k median household income980279802998027: $153k median household income98029: $171k median household income9802798029
The 2 residential ZIP codes named Issaquah, shaded by median household income in national fifths (ACS 2020-2024). Select a ZIP to open it. <$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

How different are Issaquah's ZIP codes?

The highest median household income is in 98029 ($170,759), the lowest in 98027 ($153,301). Home values run from $996,600 in 98027 to $1,063,200 in 98029.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013, B25077, B01003).

All 2 residential ZIP codes of Issaquah

Residential ZIP codes with the postal name Issaquah, WA, largest first (ACS 2020-2024); sort by any column
County
98029 King County 30,586 3,006 $171k $1.06M
98027 King County 28,955 506 $153k $997k

Download the 2 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; 2023 Gazetteer land areas (2020 ZCTAs); town names from simplemaps US ZIP Codes (CC BY 4.0) and GeoNames (CC BY 4.0).

Which counties do Issaquah's ZIP codes reach?

Issaquah's residential ZIP codes lie in King County.

Which places do Issaquah's ZIP codes cover?

A postal name is not a city limit. By the Census Bureau's places, Issaquah's residential ZIP codes cover Issaquah itself and 2 other places, each listed with the ZIP codes that have at least 5% of their land in it or hold most of the place:

Source: U.S. Census Bureau, 2020 ZCTA-to-place relationship file (shares of land).

Which first three digits do Issaquah's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of Issaquah starts with 980.

Three-digit prefixes of Issaquah's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Issaquah's
PrefixSectional centerHereAll codes
980 Seattle, WA (SCF 980) 2 71

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.