SeaTac, WA demographics:
population, income, and more

Total population
32,414
4.1% year-over-year change
Median household income
$81,104/yr
6.0% year-over-year change
Housing units
12,886
3.7% year-over-year change

Seatac population

How many people live in Seatac

Seatac is home to 32,414 residents, according to the most recent Census data. Gender-wise, 55.2% of Seatac locals are male, and 44.8% are female.

Total population
32,414
4.1% year-over-year change
Gender ratio
Male
55.2%
17,896
Female
44.8%
14,518
Value Percent YoY change
Male 17,896 55.2% 5.0%
Female 14,518 44.8% 2.9%
A higher population often means more rental variety and livelier areas. The gender balance—how many men live here compared to women—can reveal a lot about the community and the lifestyles of its residents. Use this info to get a sense of the area's pace and personality.

Age demographics

The median age in Seatac is 37, with the population distributed as follows: about 19.2% are children under 15, then 10.5% are in the 15 to 24 age group. Adults between 25 and 44 make up 34.5% of the population, while another 23% fall into the 45 to 64 bracket. Finally, around 12.8% are 65 or older.

Median age
36.8
Age breakdown
Under 15
19.2%
15 to 24
10.5%
25 to 44
34.5%
45 to 64
23%
Over 65
12.8%
Value Percent YoY change
Under 15 6,229 19.2% -1.0%
15 to 24 3,402 10.5% 2.8%
25 to 44 11,173 34.5% 6.1%
45 to 64 7,469 23% 8.8%
Over 65 4,141 12.8% -0.1%
The age composition helps you get insight into who lives in the area. A younger population might mean a more active, fast-paced vibe, while an older one could suggest a quieter, slower lifestyle. If there's a balanced makeup, you’re likely to find a variety of services, housing types, and community spaces that cater to different life stages.

Racial makeup

In Seatac, 57.1% of the population are US-born citizens, while 24.1% have gained naturalized citizenship. At the same time, 18.9% of residents are non-citizens. As for race, 28.7% of locals are Caucasian, 24.6% are African American and 17.4% have Asian roots. Another 0.5% are Indigenous American, 1.3% are Pacific Islanders, while 16.9% identify as another race. There’s also a share of 10.5% that includes residents with two or more races.

Citizenship
U.S.-born citizens
57.1%
Non-U.S.-born citizens
24.1%
Non-citizens
18.9%
Value Percent YoY change
U.S.-born citizens 18,503 57.1% 3.7%
Non-U.S.-born citizens 7,799 24.1% 6.9%
Non-citizens 6,112 18.9% 1.9%
Racial breakdown
White
28.7%
Black or African American
24.6%
American Indian and Alaska Native
0.5%
Asian
17.4%
Native Hawaiian and other Pacific Islander
1.3%
Two or more races
10.5%
Other
16.9%
Value Percent
White 9,317 28.7%
Black or African American 7,982 24.6%
American Indian and Alaska Native 169 0.5%
Asian 5,638 17.4%
Native Hawaiian and other Pacific Islander 420 1.3%
Two or more races 3,409 10.5%
Other 5,479 16.9%

Households in Seatac

A peek inside Seatac households

Seatac has 12,134 households, with an average of 3 members in each. Of these, 60.8% are families, while the remaining 39.2% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
12,134
3.1% year-over-year change
Average people per household
3
Non-family households
4,757
Family households
7,377
Value Percent YoY change
Non-family households 4,757 39.2% 0.7%
Family households 7,377 60.8% 4.7%
The mix between family and non-family households gives a glimpse into daily life. A higher percentage of families might mean more parks and schools, while more non-family setups can mean flexible housing and diverse living styles. For renters, this can signal what kinds of homes are common and can help you figure out if the area matches your lifestyle.

Housing in Seatac

The housing landscape of Seatac

Seatac's housing consists of 12,886 units, with 42.3% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 3.1% and offer a more compact, shared living style. Then there are the multifamily buildings in the area, and for those seeking flexibility, non-traditional options like mobile homes account for 4.6% of the housing landscape.

Housing units
12,886
3.7% year-over-year change
Housing types
Value Percent
1 unit, detached 5,448 42.3%
1 unit, attached 394 3.1%
2 units 224 1.7%
3 or 4 units 710 5.5%
5 to 9 units 1,042 8.1%
10 to 19 units 1,374 10.7%
20 to 49 units 911 7.1%
50 or more units 2,195 17%
Mobile home 588 4.6%
Homes built since 2020
326
68.0% year-over-year change

The age of buildings in Seatac

In Seatac, the median construction year is 1972. About 4.6% of homes were built before the 1940s, with another 6.2% going up by 1949. Most development happened in the second half of the 20th century. Then, 7.8% of homes were added from 2000 to 2009, 8.9% between 2010 and 2019, and 2.5% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 595 4.6% 5.7%
Built between 1940 and 1949 793 6.2% -3.9%
Built between 1950 and 1959 1,875 14.6% 4.3%
Built between 1960 and 1969 2,816 21.8% 0.1%
Built between 1970 and 1979 2,002 15.5% 3.0%
Built between 1980 and 1989 1,645 12.8% 4.3%
Built between 1990 and 1999 676 5.2% 9.7%
Built between 2000 and 2009 1,009 7.8% -1.9%
Built between 2010 and 2019 1,149 8.9% 7.8%
Built in 2020 or later 326 2.5% 68.0%
As a renter, knowing when homes were built helps you understand the potential condition and design of rental units. Newer builds may have more contemporary layouts, while older homes can offer character or larger lots, depending on the area.

Seatac occupancy rates

Out of the 12,134 occupied housing units in Seatac, 46.5% are owner-occupied, while 53.5% are lived in by tenants. Meanwhile, 5.8% of all homes on the local market sit vacant.

Occupied housing units
12,134
3.1% year-over-year change
Occupancy breakdown
Renter occupied
6,492
Owner occupied
5,642
Value Percent YoY
change
Renter occupied 6,492 53.5% 0.4%
Owner occupied 5,642 46.5% 6.4%
Unoccupied housing units
5.8%
Unoccupied housing units refer to homes that are currently without residents—whether they're waiting for renters or owners, used seasonally, or simply unclaimed. A higher share of empty homes may mean more housing availability, while a low number can reflect a tighter market with more competition. This, along with the renter-vs.-owner mix, helps paint a clearer picture of what types of housing and services are likely to be available in the area.

Seatac housing costs

Housing costs in Seatac come to a median of $1,739 per month, while tenants specifically pay a median gross rent of $1,660.

Median housing costs per month
$1,739/month
This figure sums up typical monthly housing costs for all households in the area. If you own, it includes mortgage payments in addition to property taxes, insurance and HOA fees. If you rent, it accounts for rent plus extras like utilities. It’s useful for seeing how local living expenses stack up compared to other places.
Median gross rent in Seatac
$1,660/month
Gross rent gives a more complete look at what renters actually pay, including not just base rent, but also utilities and fees. It’s a key number for evaluating rental affordability in your area of interest and understanding how it compares to nearby locations.

Education in Seatac

Seatac education at a glance

About 36.4% of the population in Seatac went to high school, while 21.4% pursued college studies. Another 9.4% earned an associate degree and 18.7% hold a bachelor’s. Meanwhile, 6.2% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 2,000 8% 8.8%
High school diploma 9,126 36.4% 4.3%
College diploma 5,370 21.4% 2.0%
Associate degree 2,360 9.4% 16.1%
Bachelor's degree 4,706 18.7% 4.1%
Graduate degree 1,546 6.2% 8.2%
A community’s education mix can offer insights into the local economy and housing market. Higher levels of education often align with more job opportunities and stable incomes, which can increase demand for homes and influence both rent prices and rental availability.

Income in Seatac

How much people earn in Seatac

The average annual household income in Seatac was $98,134 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a +3.6% change from the previous year. At the same time, the median income stood at $81,104, reflecting a +6% shift over the same period.

Average household income in Seatac
$98,134/year
3.6% year-over-year change
Median household income in Seatac
$81,104/year
6.0% year-over-year change

Seatac income by age

In Seatac, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $72,382. Those with someone between 45 and 64 in charge, often well established professionally, earn $103,654 overall. Overall, 90.7% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
25 - 44 $72,382 12.2%
45 - 64 $103,654 4.3%
Over 65 $57,407 1.2%
Above poverty level
28,211
Below poverty level
2,902
Value Percent YoY
change
Above poverty level 28,211 90.7% 5.2%
Below poverty level 2,902 9.3% -7.0%

Average renter income in Seatac

To get a better sense of what renters earn on average in Seatac, their median household income was $60,040 according to 2022 Census data. In addition, the rent-to-income ratio in the area, at 33.2%, shows what portion of their earnings goes toward housing expenses.

Renter median household income
$60,040
Rent-to-income ratio
33.2%
Understanding the rent-to-income ratio can help renters gauge if local housing costs align with their earnings. A ratio under 30% usually signals affordability, while exceeding this mark means rent is taking a larger-than-recommended bite out of income. That could make it harder for you to cover other costs like transportation, healthcare, or child care.

Employment in Seatac

Workforce and job types in Seatac

The job market in Seatac is powered by 16,533 working residents, spread across a range of industries and roles. 70.7% of the working population are employed in professional or administrative positions, while 29.3% are in hands-on or service-based jobs. Also, 12% run their own businesses, 71.7% are employed by private companies, and 10.2% work in the public sector.

Workforce demographics

Working population
16,533
6.5% year-over-year change
White collar
11,696
Blue collar
4,837
Value Percent YoY change
White collar 11,696 70.7% 7.1%
Blue collar 4,837 29.3% 5.1%
Employer type
Self employees
12%
Private companies
71.7%
Governmental workers
10.2%
Not for profit companies
6.2%
Value Percent YoY change
Self employees 1,979 12% 13.7%
Private companies 11,847 71.7% 8.9%
Governmental workers 1,690 10.2% -7.2%
Not for profit companies 1,017 6.2% -6.3%
Unemployment rate
7.0%
-12.5% year-over-year change

Available workforce

The unemployment rate in Seatac stands at 7%, representing the share of the workforce currently without a job and actively looking for one.

For renters, the unemployment rate helps paint a picture of job security and financial stability in the area. Rates around 4% to 5% are considered typical. A lower-than-average rate might suggest strong job prospects and a thriving local economy, while a higher rate could hint at fewer opportunities—both useful to consider when planning a move.

Transportation in Seatac

How people get around in Seatac

In Seatac, the average commute time is 25 minutes. Commuting methods vary: 75% of residents travel by personal vehicle and 5.2% prefer to walk, while the remaining share relies on public transit or on two wheelers to get from A to B.

Commute time
25 min
-0.8% year-over-year change
Means of transportation
Value Percent YoY change
Car 11,916 75% 5.7%
Taxicab 36 0.2% -51.4%
Bus or trolleybus 531 3.3% 17.7%
Subway or elevated 66 0.4% N/A
Railroad 69 0.4% 38.0%
Walk 819 5.2% 26.8%
Understanding how locals get to work can help you plan your own routine. High car usage might mean you’ll need a vehicle, while strong public transit or walkability could save you the hassle. Commute times also play a big role in quality of life—shorter trips can give you more time for the things you enjoy.

What is the median and average household income in Seatac by zipcode?

Zipcode Population Number of households Median income Average income
98148 9,715 3,954 $87,342 $107,678
98168 35,528 12,260 $88,083 $109,455
98188 27,311 11,430 $76,438 $96,830
98198 40,463 14,588 $86,239 $110,895

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FAQs about Seatac demographics 

What is the total population of Seatac?

Seatac has a total population of 32,414 residents, according to the latest release from the U.S. Census Bureau: the 2019-2023 American Community Survey (ACS) 5-year estimates. This figure changed by +4.1% compared to a year ago.

What is the gender ratio in Seatac?

The gender ratio in Seatac is as follows:
  • 55.2% males (17,896 residents)
  • 44.8% females (14,518 residents)

What is the median age in Seatac?

The median age in Seatac is 36.8.

What is the age distribution of the population in Seatac?

The age distribution in Seatac is as follows:
  • Under 15: 19.2% (6,229 residents)
  • Ages 15-24: 10.5% (3,402 residents)
  • Ages 25-44: 34.5% (11,173 residents)
  • Ages 45-64: 23% (7,469 residents)
  • Over 65: 12.8% (4,141 residents)

What is the racial and ethnic makeup of Seatac?

The racial and ethnic makeup of Seatac is as follows:
  • White: 28.7% (9,317 residents)
  • Black or African American: 24.6% (7,982 residents)
  • American Indian and Alaska Native: 0.5% (169 residents)
  • Asian: 17.4% (5,638 residents)
  • Native Hawaiian and Other Pacific Islander: 1.3% (420 residents)
  • Two or More Races: 10.5% (3,409 residents)
  • Other: 16.9% (5,479 residents)

What percentage of the population in Seatac are U.S.-born citizens?

U.S.-born citizens represent 57.1% of the population in Seatac.

How many housing units are there in Seatac?

There are 12,886 housing units in Seatac, reflecting a +3.7% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in Seatac and what is the average household size?

Seatac has a total of 12,134 households, with an average of 3 people in each.

What is the median household income in Seatac?

Seatac has a median household income of $81,104, representing a +6.0% shift from the previous year, according to the U.S. Census Bureau.

What is the employment rate and job market overview for Seatac?

The employment rate is 93% in Seatac, with a workforce of 16,533 residents. Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 70.7% (11,696 residents)
  • Blue-collar workers: 29.3% (4,837 residents)

Places of employment:
  • Self-employed: 12% (1,979 residents)
  • Private companies: 71.7% (11,847 residents)
  • Governmental workers: 10.2% (1,690 residents)
  • Not-for-profit companies: 6.2% (1,017 residents)

Data source & methodology

The demographic data on this page was sourced from the latest U.S. Census Bureau release—the 2019–2023 American Community Survey (ACS) 5-year estimates.

The information, issued annually, is compiled and published by the Point2Homes Research Team as soon as new data becomes available.

No representation, guarantee, or warranty is made concerning the accuracy or completeness of modified or aggregated information for particular areas.

Page last updated: September 2025