SeaTac, Washington Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of SeaTac, Washington is 31,143 as of the 2023 American Community Survey, making it the 44th-largest city in Washington. The median household income is $76,517, the median home value is $483,200, and the median age is 36.8.
The population has grown 26.0% since 2010 (26,998 → 34,024).
31,143
Population
3094
People / sq mi
$76,517
Median Income
$483,200
Median Home Value
Get SeaTac's next ACS population data
Subscribe for Population Review updates by email. No spam, unsubscribe anytime.
SeaTac covers 10.1 sq mi of land at 3094 people per square mile.
About SeaTac, WA
Homeownership is the standout figure in SeaTac: 45.1% of homes are owner-occupied, lower than the national rate. With 31,143 residents, SeaTac is a city in Washington. It ranks #44 among cities in Washington by population.
Household earnings are middling, with a median of $76,517 — near the US median of $78,538. The poverty rate is 8.4%, below the national 12.4%. Home values run above average at $483,200, with typical rent around $1,637.
26.6% of adults 25 and older hold a bachelor’s degree, below the national average of 35.0%. Around 10.8% of workers work from home, below the national 14.0%, and the average commute runs about 26 minutes each way.
SeaTac city Population History (2010-2024)
The city of SeaTac city had a population of 26,998 in 2010 and 34,024 in 2024, a 26.0% growth over 14 years. The peak was 34,024 in 2024. Average annual growth rate: 1.69%.
34,024
Population (2024)
26,998
Population (2010)
34,024
Peak (2024)
1.69%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 26,998 |
| 2011 | 27,548 |
| 2012 | 27,959 |
| 2013 | 28,136 |
| 2014 | 28,343 |
| 2015 | 28,513 |
| 2016 | 29,136 |
| 2017 | 29,292 |
| 2018 | 29,121 |
| 2019 | 29,044 |
| 2020 | 31,387 |
| 2021 | 31,597 |
| 2022 | 32,012 |
| 2023 | 33,152 |
| 2024 | 34,024 |
Race & Ethnicity
| White | 31.2% |
| Black or African American | 24.3% |
| Asian | 0.1% |
| Hispanic or Latino (any race) | 2.0% |
| Two or More Races | 0.0% |
Economy & Income
$76,517
Median Household Income
$37,207
Per Capita Income
8.4%
Poverty Rate
5.8%
Unemployment Rate
Housing
$483,200
Median Home Value
$1,637
Median Rent
45.1%
Owner-Occupied
Education
83.9%
High School+
26.6%
Bachelor's+
Commute
6.9%
Drive Alone
60.0%
Public Transit
10.8%
Work From Home
25.6 min
Avg Commute
Community Profile
22.3%
Foreign Born
49.3%
Non-English at Home
5.4%
Veterans
13.0%
With Disability
89.2%
Health Insurance
96.2%
Internet Access
Employment by Industry
| Retail Trade | 15.4% |
| Finance, Insurance & Real Estate | 14.2% |
| Professional, Scientific & Management | 13.6% |
| Education, Health Care & Social Services | 12.8% |
| Manufacturing | 9.6% |
| Construction | 7.6% |
| Information | 6.1% |
| Arts, Entertainment & Food Services | 3.4% |
| Public Administration | 2.6% |
| Transportation & Warehousing | 1.4% |
| Agriculture & Mining | 0.3% |
Largest cities in Washington
Largest counties in Washington
Part of Washington
Metro areas in Washington
City rankings
Frequently Asked Questions
SeaTac, Washington has a population of 31,143 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 44th-largest city in Washington.
The median household income in SeaTac, Washington is $76,517, with 8.4% of residents living below the federal poverty level.
The median home value in SeaTac, Washington is $483,200, with median monthly rent at $1,637 and a homeownership rate of 45.1%.
The median age in SeaTac, Washington is 36.8 years. The population is 54.7% male and 45.3% female.
The population has grown 26.0% since 2010 (26,998 → 34,024).
SeaTac city, WA Climate
SeaTac city, WA has an average annual temperature of 11°C (52°F) and receives about 990 mm of precipitation per year. The warmest month is August and the coldest is December. Figures are 1970–2000 climate normals.
11°C
Avg Temp
990
Precip (mm/yr)
Aug
Hottest Month
Dec
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | 4° / 40° | 136 mm |
| February | 6° / 42° | 108 mm |
| March | 8° / 46° | 103 mm |
| April | 10° / 50° | 73 mm |
| May | 13° / 55° | 47 mm |
| June | 16° / 61° | 41 mm |
| July | 19° / 65° | 24 mm |
| August | 19° / 66° | 30 mm |
| September | 16° / 60° | 44 mm |
| October | 11° / 52° | 82 mm |
| November | 7° / 44° | 148 mm |
| December | 4° / 40° | 154 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit SeaTac city, WA
The most comfortable months to visit SeaTac city, WA are typically August, July and June, when temperatures are mildest and rainfall is relatively low. The hottest month is August (around 25°C high). The coldest is December (near 1°C low). December is usually the wettest month.
Where to stay near SeaTac
Visiting or relocating to SeaTac, WA? Compare hotels and short-term rentals across the metro — live availability and prices.
Top-rated places to stay near SeaTac
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a move to SeaTac?
Get relocation and cost-of-living insights for SeaTac, WA by email. No spam, unsubscribe anytime.
More from Washington
Population 741,440
Population 229,228
Population 220,482
Population 192,696
Population 151,199
Full rankings of Washington cities by population
Statewide data for Washington
Population, race, income, age, and trends across Washington
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.