Steilacoom, Washington demographics

Steilacoom, WA demographics: median age 39.8; 47.8% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Steilacoom town, Washington · Incorporated town · GEOID 5367770. The survey estimates a population of 6,686 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Steilacoom is 39.8 years, with a 90% margin of error of 2.9 years. There are 2,813 households (±158). 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	39.8 ±2.9	38.3 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 6,686
Category	Count ± MOE	Share ± MOE (pp)	Washington	U.S.
Under 18	1,357 ±239	20.3% ±3.6 pp	21.4%	22.0%
18–34	1,426 ±275	21.3% ±4.1 pp	23.7%	22.8%
35–64	2,633 ±298	39.4% ±4.5 pp	38.3%	38.0%
65 and older	1,270 ±170	19.0% ±2.5 pp	16.6%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 6,686
Category	Count ± MOE	Share ± MOE (pp)	Washington	U.S.
Male	3,136 ±216	46.9% ±3.2 pp	50.4%	49.5%
Female	3,550 ±220	53.1% ±3.3 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: 6,686
Category	Count ± MOE	Share ± MOE (pp)	Washington	U.S.
White alone	5,072 ±344	75.9% ±5.1 pp	65.8%	61.0%
Black or African American alone	311 ±173 · low precision	4.7% ±2.6 pp · low precision	4.0%	12.2%
American Indian and Alaska Native alone	0 ±19 · low precision	0.0% ±0.3 pp · low precision	1.2%	0.9%
Asian alone	361 ±110	5.4% ±1.6 pp	9.8%	6.0%
Native Hawaiian and Other Pacific Islander alone	0 ±19 · low precision	0.0% ±0.3 pp · low precision	0.7%	0.2%
Some other race alone	136 ±117 · low precision	2.0% ±1.7 pp · low precision	5.8%	7.1%
Two or more races	806 ±246	12.1% ±3.7 pp	12.8%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 6,686
Category	Count ± MOE	Share ± MOE (pp)	Washington	U.S.
Not Hispanic or Latino	5,809 ±420	86.9% ±6.3 pp	85.6%	80.7%
Hispanic or Latino	877 ±420	13.1% ±6.3 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: 2,813
Category	Count ± MOE	Share ± MOE (pp)	Washington	U.S.
Married-couple family	1,420 ±147	50.5% ±4.4 pp	49.1%	46.9%
Other family: male householder, no spouse present	139 ±72 · low precision	4.9% ±2.5 pp · low precision	4.8%	5.1%
Other family: female householder, no spouse present	307 ±143	10.9% ±5.0 pp	9.5%	12.2%
Nonfamily: householder living alone	733 ±152	26.1% ±5.2 pp	27.7%	28.7%
Nonfamily: householder not living alone	214 ±83	7.6% ±2.9 pp	8.9%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 2,813
Category	Count ± MOE	Share ± MOE (pp)	Washington	U.S.
Households with people under 18	732 ±137	26.0% ±4.6 pp	29.3%	29.5%
Households without people under 18	2,081 ±206	74.0% ±6.0 pp	70.7%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 2,813
Category	Count ± MOE	Share ± MOE (pp)	Washington	U.S.
One-person nonfamily households	733 ±152	26.1% ±5.2 pp	27.7%	28.7%
Two-person households	1,194 ±173	42.4% ±5.7 pp	35.3%	33.8%
Three-person households	367 ±108	13.0% ±3.8 pp	15.1%	15.3%
Four-person households	280 ±73	10.0% ±2.5 pp	12.7%	12.6%
Five-person households	112 ±51	4.0% ±1.8 pp	5.6%	5.9%
Six-person households	85 ±80 · low precision	3.0% ±2.8 pp · low precision	2.2%	2.2%
Seven or more people	42 ±36 · low precision	1.5% ±1.3 pp · low precision	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: 6,686
Category	Count ± MOE	Share ± MOE (pp)	Washington	U.S.
Native	6,120 ±163	91.5% ±2.4 pp	84.6%	85.9%
Foreign born	566 ±161	8.5% ±2.4 pp	15.4%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 6,317
Category	Count ± MOE	Share ± MOE (pp)	Washington	U.S.
English only	5,674 ±218	89.8% ±2.5 pp	78.6%	77.7%
Spanish	192 ±127 · low precision	3.0% ±2.0 pp · low precision	9.0%	13.6%
French, Haitian, or Cajun	30 ±36 · low precision	0.5% ±0.6 pp · low precision	0.4%	0.7%
German or other West Germanic	93 ±53 · low precision	1.5% ±0.8 pp · low precision	0.4%	0.5%
Russian, Polish, or other Slavic	0 ±19 · low precision	0.0% ±0.3 pp · low precision	1.5%	0.7%
Other Indo-European	10 ±15 · low precision	0.2% ±0.2 pp · low precision	2.0%	2.0%
Korean	55 ±43 · low precision	0.9% ±0.7 pp · low precision	0.7%	0.3%
Chinese, including Mandarin and Cantonese	64 ±47 · low precision	1.0% ±0.7 pp · low precision	1.9%	1.1%
Vietnamese	28 ±38 · low precision	0.4% ±0.6 pp · low precision	1.0%	0.5%
Tagalog, including Filipino	71 ±51 · low precision	1.1% ±0.8 pp · low precision	0.9%	0.6%
Other Asian and Pacific Island	0 ±19 · low precision	0.0% ±0.3 pp · low precision	2.1%	1.1%
Arabic	0 ±19 · low precision	0.0% ±0.3 pp · low precision	0.4%	0.5%
Other and unspecified	100 ±108 · low precision	1.6% ±1.7 pp · low precision	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: 4,692
Category	Count ± MOE	Share ± MOE (pp)	Washington	U.S.
Less than high school graduate	328 ±124	7.0% ±2.6 pp	7.7%	10.4%
High school graduate or equivalency	675 ±158	14.4% ±3.2 pp	21.6%	26.0%
Some college, no degree	949 ±206	20.2% ±4.2 pp	21.0%	19.1%
Associate’s degree	498 ±126	10.6% ±2.6 pp	10.0%	8.8%
Bachelor’s degree	1,159 ±193	24.7% ±3.8 pp	24.0%	21.6%
Graduate or professional degree	1,083 ±187	23.1% ±3.7 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: 6,656
Category	Count ± MOE	Share ± MOE (pp)	Washington	U.S.
Same house	5,721 ±267	86.0% ±4.0 pp	85.5%	87.7%
Moved within same county	492 ±219	7.4% ±3.3 pp	8.0%	6.3%
Moved from a different county in the same state	98 ±108 · low precision	1.5% ±1.6 pp · low precision	2.8%	3.1%
Moved from a different state	320 ±161 · low precision	4.8% ±2.4 pp · low precision	2.9%	2.3%
Moved from abroad	25 ±30 · low precision	0.4% ±0.5 pp · low precision	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

4.3% of Steilacoom residents (±1.8 percentage points) had no health insurance coverage when surveyed, compared with 6.3% in Washington and 8.4% nationally. 97.3% 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	Steilacoom	Washington	U.S.	Compared with Washington
People without health insurance Civilian noninstitutionalized population	4.3% ±1.8 pp	6.3%	8.4%	Lower
Households with a broadband subscription Households	97.3% ±7.5 pp	93.6%	91.0%	Not statistically different
Veterans Civilian population age 18 and older	16.7% ±2.8 pp	7.8%	6.2%	Higher

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 Steilacoom . 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 Steilacoom housing and cost context or return to the city profile.