SeaTac, Washington Demographics & Population 2026
During the 2020–2024 ACS period, SeaTac, Washington had a total population of 32,414, the 43rd largest city in Washington, with a median household income of $81,104, which is 17% lower than the state average. The poverty rate is 9.3%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- One of the most racially diverse communities in Washington (diversity index: 78/100).
SeaTac Quick Facts
How SeaTac Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 31,143 | 32,414 | +4.1% |
| Median household income | $76,517 | $81,104 | +6.0% |
| Median home value | $483,200 | $519,700 | +7.6% |
How SeaTac Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
This community is exceptionally diverse, with no single racial or ethnic group dominating the population.
State average: 56 | National average: 61
Education
Educational Attainment (Adults 25+)
SeaTac Rankings in Washington
Explore Washington Rankings
Other Cities in King County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Seattle | 754,195 | $123,860 | 9.9% | $938,600 |
| Bellevue | 151,847 | $165,576 | 7.2% | $1,340,300 |
| Kent | 135,603 | $92,302 | 10.8% | $587,800 |
| Renton | 105,317 | $100,432 | 8.1% | $672,600 |
| Federal Way | 99,493 | $86,909 | 13.0% | $552,800 |
| Kirkland | 92,621 | $150,414 | 6.1% | $1,115,400 |
| Auburn | 85,676 | $97,884 | 8.9% | $547,900 |
| Redmond | 77,353 | $162,560 | 5.6% | $1,167,800 |
| Sammamish | 66,463 | $239,690 | 4.3% | $1,407,300 |
| Shoreline | 61,431 | $112,751 | 8.8% | $811,100 |
Cities Similar to SeaTac
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Des Moines | 32,823 | $92,483 | $597,000 | 33.4% | 12.1% |
| Mount Vernon | 35,377 | $75,777 | $472,300 | 27.9% | 16.1% |
| Wenatchee | 35,484 | $73,040 | $433,700 | 28.8% | 10.4% |
| Walla Walla | 33,925 | $66,748 | $393,600 | 27.6% | 14.3% |
| Spanaway | 34,019 | $98,251 | $445,700 | 16.6% | 8.8% |
Population Overview
SeaTac is a mid-sized community located in Washington, within King County. The total population is 32,414. It ranks as the 43rd most populous out of 628 Census-designated places in Washington.
Age Demographics
The median age in SeaTac is 36.8 years. This is 4% lower than the state median of 38.3 years.
Economy, Income & Housing
The median household income in SeaTac is $81,104. This is 17% lower than the state median of $98,141. It is also about the same as the national median of $80,734. The poverty rate stands at 9.3%. This is 6% lower than the state poverty rate of 9.9%. The unemployment rate is 7.0%. This is 37% higher than the state rate of 5.1%. The median home value is $519,700. Housing costs are 8% lower than the state median of $564,600. The home-value-to-income ratio of 6.4x suggests that housing affordability is a significant concern for many residents. 46.5% of occupied housing units are owner-occupied. This homeownership rate is 27% lower than the state average of 63.8%.
Race & Ethnicity
SeaTac is a highly diverse community where no single racial or ethnic group constitutes a majority of the population. Black or African American residents account for 24.4%. The White (non-Hispanic) population (27.0%) is well below the state average of 63.1%. The Black or African American population is significantly higher than the state average (24.4% vs 3.9%). The Hispanic or Latino population is significantly higher than the state average (22.8% vs 14.4%). The Asian population is significantly higher than the state average (17.4% vs 9.7%).
Education
26.4% of residents aged 25 and older hold a bachelor's degree or higher. This is 33% lower than the state rate of 39.6%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 83.9%.
Data Sources & Methodology
All demographic data for SeaTac, Washington is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Washington state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 628 Census-designated places in Washington. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.
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Frequently Asked Questions
What is the population of SeaTac, Washington?
SeaTac, Washington has a population of 32,414 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in SeaTac, WA?
The median household income in SeaTac is $81,104, which is about the same as the national median of $80,734.
What is the poverty rate in SeaTac, WA?
The poverty rate in SeaTac is 9.3%. This means approximately 2,945 residents live below the federal poverty line.
What is the racial makeup of SeaTac, Washington?
SeaTac's population is 27.0% White, 24.4% Black, 22.8% Hispanic/Latino, and 17.4% Asian.
What is the median home value in SeaTac, WA?
The median home value in SeaTac is $519,700. The home-value-to-income ratio is 6.4x.
How educated is SeaTac, Washington?
26.4% of adults (25+) in SeaTac hold a bachelor's degree or higher, and 6.7% hold a graduate or professional degree.