SeaTac city, Washington
Official LSAD Designation: SeaTac city • Census GEOID: 5362288
• King County
SeaTac city is an incorporated city in King County, Washington. According to official records from the Census (2025), SeaTac city had an estimated population of 34,578 residents. Official Census Bureau geographic records classify this community under LSAD designation SeaTac city (GEOID 5362288).
Local Government Administration U.S. Census Bureau GMAF
City Of Seatac
Municipal
Official Title:
Mayor
Address:
4800 S 188TH ST, STE 100, SEATAC WA 98188-4632
County Of King
County
Official Title:
Demographer
Address:
401 5TH AVE, STE 800, SEATTLE WA 98104-2391
Civic & Statistical Snapshot
| Category | Estimate | Survey Period / Source |
|---|---|---|
| Total Population | 34,578 | 2025 |
| Median Household Income | $81,104 | 2020-2024 |
| Median Home Value | $519,700 | 2020-2024 |
| Land Area | 10.06 sq mi | Gazetteer (2026) |
| Civic & Public Services | Hospitals, Libraries, Colleges | CMS / IMLS / IPEDS |
| Schools & Districts | NCES Directory Listings | Provided by k12guides.com |
| Nearby Airports | Landing Facilities | Provided by airport-data.com |
| Climate & Weather | NOAA 30-Year Normals | 1991–2020 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).