SeaTac Population

1990–2026

35,153

2026 projection

12% since 2020 (increase)

010K20K30K40K19901995200020052010201520202025

Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.

Use the left and right arrow keys to inspect population observations.

Population by year

Population estimates for SeaTac. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
202635,153+5751.66%
202534,578+8812.61%
202433,697+7442.26%
202332,953+1,0123.17%
202231,941+3321.05%
202131,609+2150.68%
202031,394+2,3608.13%
201929,034-1230.42%
201829,157-1830.62%
201729,340+1560.53%

Showing 10 of 19 years.

SeaTac Demographics

36.8median age

Median age

Female36.5 yrs
Male37.2 yrs

Adults

25,108
4,141 seniors · 16%20,967 other adults

Sex

Female 44.8% · 14,518Male 55.2% · 17,896

Population by age

MaleFemale85+ years, male: 18885+ years, female: 22880–84 years, male: 29880–84 years, female: 10775–79 years, male: 19375–79 years, female: 62170–74 years, male: 73070–74 years, female: 45165–69 years, male: 63265–69 years, female: 69360–64 years, male: 85560–64 years, female: 88355–59 years, male: 1,10655–59 years, female: 82750–54 years, male: 86150–54 years, female: 79945–49 years, male: 1,56445–49 years, female: 57440–44 years, male: 1,65340–44 years, female: 96735–39 years, male: 1,54335–39 years, female: 1,35730–34 years, male: 1,39430–34 years, female: 1,46525–29 years, male: 1,58825–29 years, female: 1,20620–24 years, male: 1,12320–24 years, female: 85615–19 years, male: 95815–19 years, female: 46510–14 years, male: 1,41310–14 years, female: 6445–9 years, male: 8795–9 years, female: 1,3320–4 years, male: 9180–4 years, female: 1,04385+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–45005001K1K1.5K1.5K

Hover or tap an age group to see exact counts. Use the up and down arrow keys to inspect age groups.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101

Race and ethnicity

Tap a square or a group below to highlight it.

Each square is about 1% of residents (roughly 324 people).

Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002

SeaTac Income

$81,104median household income

Median household income

$81,104

Half of households earn more, half earn less

Median earnings

$48,755

Typical yearly pay for a worker 25 or older.

Poverty rate

9.3%

About 1 in 11 residents

U.S. Census Bureau, 2024 ACS 5-year estimates · Tables S1901, S1501, S1701

SeaTac Marital Status

47% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married47%45%50%
Never married37%43%28%
Divorced10%8%13%
Widowed4%2%6%
Separated2%2%2%

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201

Sources

10 sources, all from the U.S. Census Bureau

Population

American Community Survey, 2024 5-year