Residential delivery area · Washington
ZIP Code 98109: Seattle, WA
ZIP code 98109 is in Seattle, Washington, entirely in King County (Census 2020 ZIP-county file). About 34,000 people live there (Census Bureau, ACS 2020-2024), the 12th most populous of Seattle's 38 residential ZIP codes. Median household income is $133,663 (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Seattle · 38 residential ZIPs
- County
- King County
- Census places
- Seattle
- Neighborhoods
- Cascade, Lower Queen Anne, Westlake GeoNames
- Metro area
- Seattle-Tacoma-Bellevue, WA
- House district
- WA-7 119th Congress
- State
- Washington
- Time zone
- Pacific
- Land area
- 1.9 sq mi · 17,741 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 98109?
98109 centers on 47.631°, -122.344° and covers 1.9 square miles of land plus 0.3 of water. It borders 6 ZIP codes: 98102, 98121, 98119, 98101, 98103, 98107.
The map draws ZIP code areas only. For the streets inside 98109, 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); neighborhoods from the GeoNames gazetteer (CC BY 4.0), placed in this ZIP code by PlainZIP.
How does 98109 compare with the rest of Seattle?
| Measure | 98109 | In Seattle | In King County | In WA |
|---|---|---|---|---|
| People (ACS 2020-2024) | 34,328 | 12th of 38 | 30th of 89 | 77th of 605 |
| Median household income | $134k | 9th of 32 | 35th of 78 | 42nd of 363 |
| Median home value | $1.03M | 9th of 32 | 24th of 78 | 25th of 392 |
Its median household income is higher than in 94% of U.S. residential ZIP codes, and it is denser than 99% 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 98109?
The 2020 Census counted 34,551 people in 98109; the ACS, which samples households over 2020-2024, estimates 34,328. Between the 2010 and 2020 censuses its population grew 66.8% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 34,328
- 2020 Census count
- 34,551+66.8% since 2010 (20,715)
- Households
- 21,883
- Median age
- 31.7
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 98109?
Of the 34,328 people the ACS estimates in 98109, 5.0% are under 18 and 7.7% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (48.6%), then Asian (not Hispanic) (31.6%).
- Under 185.0%
- 18 to 6487.3%
- 65 and older7.7%
- White, not Hispanic48.6%
- Asian, not Hispanic31.6%
- Other or two or more8.2%
- Hispanic or Latino7.7%
- Black, not Hispanic3.9%
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 98109 earn?
Median household income is $133,663 (ACS 2020-2024), the 35th highest of the 78 ranked ZIP codes in King County. It is not measurably different from 2015-2019 ($130,543 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $133,663
- Income per person
- $117,676
- Below the poverty line
- 8.7%
- Unemployed (of the labor force)
- 4.2%
- Adults 25+ with a bachelor's degree
- 79.4%
- Adjusted gross income per tax return, 2022
- $181,31421,450 returns; wages 77% 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 98109?
FHFA's house price index for 98109, built from repeat sales and appraisals of the same homes, rose 57% from 2015 to 2025 and rose 14% from 2020 to 2025, and moved +9.3% in 2025.
- Median home value (owners' estimate)
- $1,034,100
- Median gross rent
- $2,343
- Homes owned by their occupants
- 21.1%
- Housing units
- 24,597
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 98109?
1,663 business establishments had a location in this ZIP code in 2023, 101 fewer than in 2018; the most are in professional, scientific, and technical services (ZIP Code Business Patterns).
- Professional, scientific, and technical services296
- Accommodation and food services254
- Health care and social assistance185
- Real estate and rental and leasing169
- Other services (except public administration)166
- Retail trade105
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 98109?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 98102 | Seattle | 27,333 | $115k | 1.0 mi |
| 98121 | Seattle | 21,166 | $152k | 1.1 mi |
| 98119 | Seattle | 26,879 | $124k | 1.3 mi |
| 98101 | Seattle | 17,153 | $129k | 1.4 mi |
| 98103 | Seattle | 52,671 | $131k | 3.0 mi |
| 98107 | Seattle | 28,776 | $143k | 3.0 mi |
| 98154 | Seattle | 0 | – | 1.8 mi (near) |
| 98164 | Seattle | 292 | $250k+ | 1.8 mi (near) |
| 98174 | Seattle | 0 | – | 1.9 mi (near) |
| 98104 | Seattle | 16,542 | $62k | 2.2 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.