Residential delivery area · Washington
ZIP Code 98166: Seattle, WA
ZIP code 98166 uses the postal name Seattle, Washington and lies entirely in King County (Census 2020 ZIP-county file). About 22,000 people live there (Census Bureau, ACS 2020-2024), the 26th most populous of Seattle's 38 residential ZIP codes. Median household income is $114,969 (Census Bureau, ACS 2020-2024). Most of its land (59%) lies in the city of Burien.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Seattle · 38 residential ZIPs
- County
- King County
- Census places
- Burien (59%); Normandy Park (41%)
- Metro area
- Seattle-Tacoma-Bellevue, WA
- House district
- WA-7 119th Congress
- State
- Washington
- Time zone
- Pacific
- Land area
- 5.8 sq mi · 3,823 people per sq mi
- PO Box ZIPs
- 21 more ZIP codes use the name Seattle for PO boxes or single organizations
Where is ZIP code 98166?
98166 centers on 47.452°, -122.353° and covers 5.8 square miles of land plus 1.6 of water. It borders 4 ZIP codes: 98148, 98146, 98168, 98198.
The map draws ZIP code areas only. For the streets inside 98166, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 98166 compare with the rest of Seattle?
| Measure | 98166 | In Seattle | In King County | In WA |
|---|---|---|---|---|
| People (ACS 2020-2024) | 22,082 | 26th of 38 | 57th of 89 | 161st of 605 |
| Median household income | $115k | 17th of 32 | 52nd of 78 | 82nd of 363 |
| Median home value | $824k | 18th of 32 | 43rd of 78 | 51st of 392 |
Its median household income is higher than in 89% of U.S. residential ZIP codes, and it is denser than 91% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 98166?
The 2020 Census counted 22,152 people in 98166; the ACS, which samples households over 2020-2024, estimates 22,082. Between the 2010 and 2020 censuses its population grew 9.1% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 22,082
- 2020 Census count
- 22,152+9.1% since 2010 (20,301)
- Households
- 8,961
- Median age
- 43.6
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 98166?
Of the 22,082 people the ACS estimates in 98166, 18.4% are under 18 and 20.5% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (66.8%), then Hispanic or Latino (14.7%).
- Under 1818.4%
- 18 to 6461.1%
- 65 and older20.5%
- White, not Hispanic66.8%
- Hispanic or Latino14.7%
- Other or two or more9.9%
- Asian, not Hispanic6.6%
- Black, not Hispanic2.1%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 98166 earn?
Median household income is $114,969 (ACS 2020-2024), the 52nd highest of the 78 ranked ZIP codes in King County. It is not measurably different from 2015-2019 ($102,595 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $114,969±$14,438
- Income per person
- $66,945
- Below the poverty line
- 10.1%
- Unemployed (of the labor force)
- 4.8%
- Adults 25+ with a bachelor's degree
- 46.9%
- Adjusted gross income per tax return, 2022
- $131,32311,090 returns; wages 64% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 98166?
FHFA's house price index for 98166, built from repeat sales and appraisals of the same homes, rose 110% from 2015 to 2025 and rose 40% from 2020 to 2025, and moved +2.1% in 2025.
- Median home value (owners' estimate)
- $824,400
- Median gross rent
- $1,782
- Homes owned by their occupants
- 67.9%
- Housing units
- 9,823
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 98166?
740 business establishments had a location in this ZIP code in 2023, 32 more than in 2018; the most are in health care and social assistance (ZIP Code Business Patterns).
- Health care and social assistance131
- Professional, scientific, and technical services97
- Construction82
- Accommodation and food services82
- Other services (except public administration)76
- Retail trade67
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 98166?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 98148 | Seattle | 9,715 | $87k | 1.3 mi |
| 98146 | Seattle | 28,573 | $103k | 3.4 mi |
| 98168 | Seattle | 35,528 | $88k | 3.6 mi |
| 98198 | Seattle | 40,463 | $86k | 4.5 mi |
| 98158 | Seattle | 0 | – | 2.1 mi (near) |
| 98188 | Seattle | 27,311 | $76k | 3.8 mi (near) |
| 98178 | Seattle | 26,748 | $100k | 6.0 mi (near) |
| 98032 | Kent | 40,862 | $83k | 6.1 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.