SeaTac, Washington Population 2024

29,652

SeaTac is a city located in King County Washington. SeaTac has a 2024 population of 29,652. SeaTac is currently declining at a rate of -1.45% annually and its population has decreased by -5.56% since the most recent census, which recorded a population of 31,398 in 2020.

The average household income in SeaTac is $94,261 with a poverty rate of 11.27%. The median rental costs in recent years comes to - per month, and the median house value is -. The median age in SeaTac is 36.1 years, 36 years for males, and 36.3 years for females.

SeaTac Demographics

According to the most recent ACS, the racial composition of SeaTac was:

  • White: 33.69%
  • Black or African American: 24.29%
  • Asian: 16.24%
  • Other race: 14.27%
  • Two or more races: 7.6%
  • Native Hawaiian or Pacific Islander: 3.2%
  • Native American: 0.7%
Land Area (mi²)
10.1 sq mi
Density (mi²)
2,946.30/sq mi
Growth Since 2020
-5.56% (-1,746)
The current population of SeaTac, Washington is 29,652 based on our projections of the latest US Census estimates.The last official US Census in 2020 recorded the population at 31,398.

SeaTac, Washington Population 2024

Population by Race

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Race
Population
Percentage (of total)
White10,42033.69%
Black or African American7,51224.29%
Asian5,02416.24%
Other race4,41214.27%
Two or more races2,3517.6%
Native Hawaiian or Pacific Islander9913.2%
Native American2170.7%

White

Black or African American

Asian

Other race

Two or more races

Native Hawaiian or Pacific Islander

Native American

SeaTac Population by Race

SeaTac Population Pyramid 2024

SeaTac Median Age

36.1

Total

36

Male

36.3

Female

SeaTac Adults

There are 23,954 adults, (3,974 of whom are seniors) in SeaTac.

SeaTac Age Dependency

54.8

Age Dependency Ratio

19.9

Old Age Dependency Ratio

34.9

Child Dependency Ratio

SeaTac Sex Ratio

Female14,17745.84%
Male16,75054.16%

SeaTac Population by Age

SeaTac Renter vs Owner Occupied by Household Type

Household Type
Count
Average Size
Owner
Renter
All11,4142.6346.953.1
Non Family4,4881.343.856.2
Married4,4303.5557.942.1
Female1,3213.493367
Male1,1753.2932.667.4

3.34

Average Family Size

2.63

Average Household Size

46.9%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

SeaTac Households and Families

Male

Female

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Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

SeaTac Educational Attainment by Sex (over 25)

SeaTac Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

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The highest rate of high school graduation is among white people with a rate of 95.13%.

The highest rate of bachelors degrees is among asian people with a rate of 39.94%.

SeaTac Educational Attainment by Race

All

Male

Female

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$45,736

Average Earnings

$46,612

Average Male

$43,314

Average Female

SeaTac Earnings by Educational Attainment

SeaTac Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

SeaTac Language

50.15% of SeaTac residents speak only English, while 49.85% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 16.28% of the population.

SeaTac Language

SeaTac Poverty by Race

rate

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Name
Total
In Poverty
Poverty Rate
Hispanic6,32596415.24%
Black7,42091412.32%
White8,8677938.94%
Other4,40476517.37%
Asian5,0014899.78%
Multiple2,33436915.81%
Native16974.14%

11.27%

Overall Poverty Rate

9.04%

Male Poverty Rate

13.86%

Female Poverty Rate

Poverty in SeaTac

The race most likely to be in poverty in SeaTac is Other, with 17.37% below the poverty level.

The race least likely to be in poverty in SeaTac is Native, with 4.14% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 2.18%. Among those working part-time, it was 13.49%, and for those that did not work, the poverty rate was 22.71%.

SeaTac Poverty

rate

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Rate
Poverty
Less Than 9th Grade21.39%
Some College9.92%
High School9.8%
Bachelors or Greater3.78%

SeaTac Poverty Rate by Education

rate

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Rate
Poverty
Female Unemployed29.04%
Male Unemployed22.06%
Female Employed6.25%
Male Employed5.1%

SeaTac Poverty Rate by Employment Status and Sex

SeaTac Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

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mean

median

Income by Household Type

SeaTac Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

46.4%

Overall Marriage Rate

45.2%

Male Marriage Rate

48.0%

Female Marriage Rate

SeaTac Married by Age and Sex

male

female

SeaTac Marriage

The age group where males are most likely to be married is 45-54, while the female age group most likely to be married is 35-44.

SeaTac Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

SeaTac Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

1,456

Number of Veterans

1,334

Male Veterans

122

Female Veterans

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SeaTac Veterans by War

count

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SeaTac Veterans by Age

count

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SeaTac Veterans by Race

SeaTac Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

5.93%

Veteran Poverty Rate

28.13%

Veteran Disability Rate

SeaTac Veterans by Education

LaborForceParticipation

71.3%

Labor Force Participation

66%

Employment Rate

7.4%

Unemployment Rate

SeaTac Employment by Age

LaborForceParticipation

SeaTac Employment by Race

LaborForceParticipation

SeaTac Employment by Education

Origin of Non-Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

36.49%

Born in SeaTac

61.17%

Native Born

38.83%

Foreign Born

18.14%

Non Citizen

20.69%

Naturalized

Place of Birth

61.17% of SeaTac residents were born in the United States, with 36.49% having been born in Washington. 18.14% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Africa.

SeaTac Place of Birth

Note: data after 2022 is projected based on recent change

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Year
Population
Growth
Growth Rate
202927,469-437-1.57%
202827,906-436-1.54%
202728,342-437-1.52%
202628,779-436-1.49%
202529,215-437-1.47%
202429,652-436-1.45%
202330,088-437-1.43%
202230,525-397-1.28%
202130,922-476-1.52%
202031,3982,3648.14%
201929,034-123-0.42%
201829,157-183-0.62%
201729,3401560.53%
201629,1846302.21%
201528,5541760.62%
201428,3782080.74%
201328,1701830.65%
201227,9874171.51%
201127,5705712.11%
201026,99900%
200025,4962,69611.82%
199022,800-4,669-17%

SeaTac Population by Year