SeaTac, Washington Population 2020

29,561

SeaTac is a city located in Washington. With a 2020 population of 29,561, it is the 40th largest city in Washington and the 1303rd largest city in the United States. SeaTac is currently growing at a rate of 0.55% annually and its population has increased by 9.86% since the most recent census, which recorded a population of 26,909 in 2010. Spanning over 10 miles, SeaTac has a population density of 2,937 people per square mile.

The average household income in SeaTac is $74,268 with a poverty rate of 12.42%. The median rental costs in recent years comes to $1,190 per month, and the median house value is $288,600. The median age in SeaTac is 34.9 years, 34.1 years for males, and 35.9 years for females. For every 100 females there are 114.1 males.

SeaTac Demographics

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

  • White: 40.63%
  • Black or African American: 23.87%
  • Asian: 15.14%
  • Other race: 7.95%
  • Two or more races: 7.78%
  • Native Hawaiian or Pacific Islander: 3.66%
  • Native American: 0.98%
The current population of SeaTac, Washington is 29,561, based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 29,239.The last official US Census in 2010 recorded the population at 26,909.

SeaTac, Washington Population 2020

Population by Race

Race Population Percentage
White11,75140.63%
Black or African American6,90323.87%
Asian4,37815.14%
Some Other Race2,2997.95%
Two or More Races2,2517.78%
Native Hawaiian and Other Pacific Islander1,0593.66%
American Indian and Alaska Native2840.98%

SeaTac Population Pyramid 2020

SeaTac Median Age

34.9


Total

34.1


Male

35.9


Female

SeaTac Adults

There are 22,263 adults, (3,154 of whom are seniors) in SeaTac.

SeaTac Age Dependency

51.4

Age Dependency Ratio

16.5

Old Age Dependency Ratio

34.9

Child Dependency Ratio

SeaTac Sex Ratio

Female

13,509

46.70%

Male

15,416

53.30%

SeaTac Households and Families

SeaTac Renter vs Owner Occupied by Household Type

SeaTac Household Types

Type Owner Renter
Married63.1%36.9%
All49.7%50.3%
Male45.3%54.7%
Female39.2%60.8%
Non Family38.6%61.4%

49.7%

Rate of Home Ownership

Type Count Average Size Owned
All9,6712.8849.7
Married4,1293.8263.1
Non Family3,5081.4338.6
Female1,2233.4339.2
Male8113.5845.3

3.54

Average Family Size

2.88

Average Household Size

7.7%

Unmarried (Opposite Sex)

0.6%

Unmarried (Same Sex)

SeaTac Education

Education Attained Count Percentage
Less Than 9th Grade1,4717.42%
9th to 12th Grade1,5717.93%
High School Graduate5,37827.15%
Some College5,19226.21%
Associates Degree1,9059.62%
Bachelors Degree3,27616.54%
Graduate Degree1,0195.14%

SeaTac Educational Attainment by Race

Name Total High School Bachelors
White7,6157,1701,659
Black4,5593,792815
Asian3,2232,6481,087
Hispanic2,7271,606372
Other Race1,26473780
Multiple Races1,059919340
Islander59159145
Native American19715733

The highest rate of high school graduation is among islander people with a rate of 100.00%.

The highest rate of bachelors degrees is among asian people with a rate of 33.73%.

Name Average Male Female
Overall$32,628$37,204$27,955
Less Than High School$25,850$31,583$18,378
High School Grad$30,226$31,250$27,912
Some College$35,897$40,621$28,188
Bachelors Degree$41,648$40,000$42,572
Graduate Degree$39,677$38,685$46,364

$32,628

Average Earnings

$37,204

Average Male

$27,955

Average Female

SeaTac Language

SeaTac Language by Age

SeaTac Language

50.41% of SeaTac residents speak only English, while 49.59% speak other languages. The non-English language spoken by the largest group is Other languages, which is spoken by 15.62% of the population.

SeaTac Poverty

SeaTac Poverty by Race

Name Total In Poverty Poverty Rate
Black6,8121,29519.01%
Hispanic5,08592518.19%
White8,8296537.40%
Other2,26662827.71%
Asian4,2443418.03%
Multiple2,19129013.24%
Islander1,059454.25%

12.42%

Overall Poverty Rate

11.90%

Male Poverty Rate

13.00%

Female Poverty Rate

Poverty in SeaTac

The race most likely to be in poverty in SeaTac is Other, with 27.71% below the poverty level.

The race least likely to be in poverty in SeaTac is Islander, with 4.25% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 2.35%. Among those working part-time, it was 15.65%, and for those that did not work, the poverty rate was 19.64%.

Name Poverty
Less Than High School24.78%
High School10.72%
Some College8.03%
Bachelors or Greater3.79%
Name Poverty
Male Unemployed23.72%
Female Unemployed9.93%
Male Employed7.68%
Female Employed6.89%

SeaTac Income

SeaTac Income by Household Type

Name Median Mean
Households$58,995$74,268
Families$71,405$80,078
Married Families$80,971$89,651
Non Families$42,661$55,624

SeaTac Marital Status

SeaTac Marital Status

Marriage Rates

44.6%

Overall Marriage Rate

43.2%

Male Marriage Rate

46.2%

Female Marriage Rate

SeaTac Married by Age and Sex

SeaTac Marriage

The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 35-44.

SeaTac Marital Status by Race

SeaTac Veterans

1,467

Number of Veterans

1,343

Male Veterans

124

Female Veterans

War Veterans
Vietnam453
First Gulf War326
Second Gulf War265
Korea122
World War II36
Age Group Veterans
35 to 54389
65 to 74370
55 to 64278
75+250
18 to 34180
Name Veterans % of Total
White9399.63%
Black2114.08%
2 or More1309.98%
Asian1203.24%
Hispanic461.47%
Other292.02%
Hawaiian203.27%
Indian187.26%

$SeaTac Veterans by Education

7.08%

Veteran Poverty Rate

29.98%

Veteran Disability Rate

SeaTac Employment Status

68.2%

Labor Force Participation

64.8%

Employment Rate

4.8%

Unemployment Rate

SeaTac Place of Birth

Origin of Non-Citizens

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

Origin of Naturalized Citizens

37.95%

Born in Washington

62.15%

Native Born

37.85%

Foreign Born

18.83%

Non Citizen

Place of Birth

62.15% of SeaTac residents were born in the United States, with 37.95% having been born in Washington. 18.83% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Africa.

Year Population Growth Annual Growth Rate
202029,5611610.55%
201929,4001610.55%
201829,239-103-0.35%
201729,3421610.55%
201629,1816282.20%
201528,5531700.60%
201428,3832160.77%
201328,1671810.65%
201227,9864211.53%
201127,5655692.11%
201026,9961,5000.57%
200025,4962,6961.12%
199022,8000.00%