Seattle, Washington demographics

Seattle, WA demographics: median age 35.6; 68.4% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Seattle city, Washington · Incorporated city · GEOID 5363000. The survey estimates a population of 754,195 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Seattle is 35.6 years, with a 90% margin of error of 0.2 years. There are 363,466 households (±2,041). Age and household distributions show how these totals are composed; they do not establish which neighborhood suits a particular person.

Every count and share is an estimate. “±” is a 90% margin of error (MOE); pp means percentage points. Derived shares use the category count divided by the named universe. Aggregated category MOEs and percentage MOEs are approximate. A margin larger than half its estimate is flagged as low precision. Blank source uncertainty is shown as unavailable, never zero.

Age distribution and sex

City, state and U.S. estimates · ACS 2020–2024
Measure / survey universe	City estimate ± MOE	State estimate ± MOE	U.S. estimate ± MOE
Median age Total population · years	35.6 ±0.2	38.3 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 754,195
Category	Count ± MOE	Share ± MOE (pp)	Washington	U.S.
Under 18	103,823 ±2,515	13.8% ±0.3 pp	21.4%	22.0%
18–34	264,510 ±3,741	35.1% ±0.5 pp	23.7%	22.8%
35–64	287,666 ±3,832	38.1% ±0.5 pp	38.3%	38.0%
65 and older	98,196 ±2,327	13.0% ±0.3 pp	16.6%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 754,195
Category	Count ± MOE	Share ± MOE (pp)	Washington	U.S.
Male	384,156 ±2,546	50.9% ±0.3 pp	50.4%	49.5%
Female	370,039 ±2,539	49.1% ±0.3 pp	49.6%	50.5%

The age groups are mutually exclusive and cover the entire population. The sex categories follow this ACS table’s published classification; they are not a survey of gender identity.

Race and Hispanic origin

Race · B02001 · ACS 2020–2024 Total population: 754,195
Category	Count ± MOE	Share ± MOE (pp)	Washington	U.S.
White alone	454,901 ±4,294	60.3% ±0.6 pp	65.8%	61.0%
Black or African American alone	49,151 ±2,619	6.5% ±0.3 pp	4.0%	12.2%
American Indian and Alaska Native alone	4,361 ±538	0.6% ±0.1 pp	1.2%	0.9%
Asian alone	133,100 ±3,709	17.6% ±0.5 pp	9.8%	6.0%
Native Hawaiian and Other Pacific Islander alone	1,868 ±468	0.2% ±0.1 pp	0.7%	0.2%
Some other race alone	23,357 ±2,459	3.1% ±0.3 pp	5.8%	7.1%
Two or more races	87,457 ±2,640	11.6% ±0.4 pp	12.8%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 754,195
Category	Count ± MOE	Share ± MOE (pp)	Washington	U.S.
Not Hispanic or Latino	690,301 ±2,679	91.5% ±0.4 pp	85.6%	80.7%
Hispanic or Latino	63,894 ±2,678	8.5% ±0.4 pp	14.4%	19.3%

Hispanic origin and race are separate questions. People of Hispanic or Latino origin may be of any race and appear in both tables. Do not add the Hispanic share to race shares. Race alone and two-or-more-race groups are the mutually exclusive categories of the race table.

Household types, children and living alone

Household types · B11001 · ACS 2020–2024 Households: 363,466
Category	Count ± MOE	Share ± MOE (pp)	Washington	U.S.
Married-couple family	124,665 ±1,893	34.3% ±0.5 pp	49.1%	46.9%
Other family: male householder, no spouse present	8,922 ±787	2.5% ±0.2 pp	4.8%	5.1%
Other family: female householder, no spouse present	19,196 ±1,196	5.3% ±0.3 pp	9.5%	12.2%
Nonfamily: householder living alone	154,647 ±2,980	42.5% ±0.8 pp	27.7%	28.7%
Nonfamily: householder not living alone	56,036 ±1,737	15.4% ±0.5 pp	8.9%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 363,466
Category	Count ± MOE	Share ± MOE (pp)	Washington	U.S.
Households with people under 18	63,076 ±1,349	17.4% ±0.4 pp	29.3%	29.5%
Households without people under 18	300,390 ±2,553	82.6% ±0.5 pp	70.7%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 363,466
Category	Count ± MOE	Share ± MOE (pp)	Washington	U.S.
One-person nonfamily households	154,647 ±2,980	42.5% ±0.8 pp	27.7%	28.7%
Two-person households	127,876 ±2,505	35.2% ±0.7 pp	35.3%	33.8%
Three-person households	38,856 ±1,670	10.7% ±0.5 pp	15.1%	15.3%
Four-person households	29,770 ±1,294	8.2% ±0.4 pp	12.7%	12.6%
Five-person households	8,309 ±668	2.3% ±0.2 pp	5.6%	5.9%
Six-person households	2,435 ±389	0.7% ±0.1 pp	2.2%	2.2%
Seven or more people	1,573 ±280	0.4% ±0.1 pp	1.5%	1.4%

A family household contains related people under the Census definition. A nonfamily household can contain one person or unrelated people sharing a home. Households with children can also appear in the household-type and size tables, so those tables must not be added together. Household estimates exclude people living in group quarters from the household universe.

Nativity and languages spoken at home

Nativity · B05002 · ACS 2020–2024 Total population: 754,195
Category	Count ± MOE	Share ± MOE (pp)	Washington	U.S.
Native	602,206 ±3,253	79.8% ±0.4 pp	84.6%	85.9%
Foreign born	151,989 ±3,264	20.2% ±0.4 pp	15.4%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 722,225
Category	Count ± MOE	Share ± MOE (pp)	Washington	U.S.
English only	551,399 ±3,815	76.3% ±0.5 pp	78.6%	77.7%
Spanish	34,234 ±2,038	4.7% ±0.3 pp	9.0%	13.6%
French, Haitian, or Cajun	5,169 ±768	0.7% ±0.1 pp	0.4%	0.7%
German or other West Germanic	4,998 ±889	0.7% ±0.1 pp	0.4%	0.5%
Russian, Polish, or other Slavic	7,089 ±1,000	1.0% ±0.1 pp	1.5%	0.7%
Other Indo-European	24,194 ±1,709	3.3% ±0.2 pp	2.0%	2.0%
Korean	6,059 ±936	0.8% ±0.1 pp	0.7%	0.3%
Chinese, including Mandarin and Cantonese	36,036 ±2,050	5.0% ±0.3 pp	1.9%	1.1%
Vietnamese	11,342 ±1,341	1.6% ±0.2 pp	1.0%	0.5%
Tagalog, including Filipino	7,318 ±992	1.0% ±0.1 pp	0.9%	0.6%
Other Asian and Pacific Island	16,867 ±1,613	2.3% ±0.2 pp	2.1%	1.1%
Arabic	1,875 ±526	0.3% ±0.1 pp	0.4%	0.5%
Other and unspecified	15,645 ±1,369	2.2% ±0.2 pp	1.1%	0.8%

Foreign born means not a U.S. citizen at birth; it includes naturalized citizens. Language categories describe speech at home among people age five and older. A language other than English at home does not establish that someone cannot speak English. This city page uses the published C16001 summary categories because the more detailed B16001 table does not provide these city records in this release.

Educational attainment

Highest completed education · B15003 · ACS 2020–2024 Population age 25 and older: 575,109
Category	Count ± MOE	Share ± MOE (pp)	Washington	U.S.
Less than high school graduate	23,172 ±1,420	4.0% ±0.2 pp	7.7%	10.4%
High school graduate or equivalency	54,349 ±2,391	9.5% ±0.4 pp	21.6%	26.0%
Some college, no degree	70,622 ±2,286	12.3% ±0.4 pp	21.0%	19.1%
Associate’s degree	33,309 ±1,612	5.8% ±0.3 pp	10.0%	8.8%
Bachelor’s degree	217,592 ±3,447	37.8% ±0.6 pp	24.0%	21.6%
Graduate or professional degree	176,065 ±3,518	30.6% ±0.6 pp	15.6%	14.1%

The denominator excludes residents under 25. Each person is counted in the highest attainment category they completed. This table does not measure the quality of local schools or the education level of every current student.

Residence one year earlier

Geographic mobility · B07003 · ACS 2020–2024 Population age 1 and older: 747,798
Category	Count ± MOE	Share ± MOE (pp)	Washington	U.S.
Same house	583,759 ±3,981	78.1% ±0.5 pp	85.5%	87.7%
Moved within same county	96,039 ±3,402	12.8% ±0.5 pp	8.0%	6.3%
Moved from a different county in the same state	15,521 ±1,388	2.1% ±0.2 pp	2.8%	3.1%
Moved from a different state	41,927 ±2,433	5.6% ±0.3 pp	2.9%	2.3%
Moved from abroad	10,552 ±1,039	1.4% ±0.1 pp	0.8%	0.6%

These are respondents’ residence patterns one year before their survey response, pooled across the five-year window. They are not a net migration count for 2025. A person can move to a different house within the same city or county; moves within the same county should not automatically be interpreted as new arrivals to the city.

Health insurance, internet access and veterans

4.2% of Seattle residents (±0.3 percentage points) had no health insurance coverage when surveyed, compared with 6.3% in Washington and 8.4% nationally. 94.5% of households subscribe to broadband of any type, including cellular data plans. A subscription is not the same as available service: the FCC National Broadband Map shows providers at a specific address.

City, state and U.S. shares · ACS 2020–2024
Measure	Seattle	Washington	U.S.	Compared with Washington
People without health insurance Civilian noninstitutionalized population	4.2% ±0.3 pp	6.3%	8.4%	Lower
Households with a broadband subscription Households	94.5% ±0.3 pp	93.6%	91.0%	Higher
Veterans Civilian population age 18 and older	3.3% ±0.2 pp	7.8%	6.2%	Lower

Reading and reusing the estimates

The Census table links above lead to the original detailed tables. Counts, source universes and uncertainty are retained in the source observation download for Seattle . Compare these figures with the same survey window; do not compare one city’s five-year estimate with another city’s annual estimate as though they measured the same period. For methods, see uncertainty and denominator calculations.

Read Seattle housing and cost context or return to the city profile.