Seal Beach, California demographics

Seal Beach, CA demographics: median age 61.5; 51.4% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Seal Beach city, California · Incorporated city · GEOID 0670686. The survey estimates a population of 24,722 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Seal Beach is 61.5 years, with a 90% margin of error of 1.6 years. There are 12,837 households (±427). 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	61.5 ±1.6	37.9 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 24,722
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Under 18	3,196 ±449	12.9% ±1.8 pp	22.0%	22.0%
18–34	3,118 ±451	12.6% ±1.8 pp	23.9%	22.8%
35–64	7,603 ±584	30.8% ±2.4 pp	38.5%	38.0%
65 and older	10,805 ±810	43.7% ±3.3 pp	15.7%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 24,722
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Male	11,087 ±470	44.8% ±1.9 pp	49.9%	49.5%
Female	13,635 ±474	55.2% ±1.9 pp	50.1%	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: 24,722
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
White alone	16,838 ±637	68.1% ±2.6 pp	39.7%	61.0%
Black or African American alone	302 ±161 · low precision	1.2% ±0.7 pp · low precision	5.4%	12.2%
American Indian and Alaska Native alone	184 ±110 · low precision	0.7% ±0.4 pp · low precision	1.3%	0.9%
Asian alone	3,471 ±384	14.0% ±1.6 pp	15.5%	6.0%
Native Hawaiian and Other Pacific Islander alone	12 ±17 · low precision	0.0% ±0.1 pp · low precision	0.4%	0.2%
Some other race alone	1,009 ±277	4.1% ±1.1 pp	18.5%	7.1%
Two or more races	2,906 ±434	11.8% ±1.8 pp	19.2%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 24,722
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Not Hispanic or Latino	21,267 ±467	86.0% ±1.9 pp	59.8%	80.7%
Hispanic or Latino	3,455 ±465	14.0% ±1.9 pp	40.2%	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: 12,837
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Married-couple family	5,014 ±305	39.1% ±2.0 pp	48.4%	46.9%
Other family: male householder, no spouse present	555 ±192	4.3% ±1.5 pp	6.3%	5.1%
Other family: female householder, no spouse present	551 ±130	4.3% ±1.0 pp	13.1%	12.2%
Nonfamily: householder living alone	5,946 ±569	46.3% ±4.2 pp	24.3%	28.7%
Nonfamily: householder not living alone	771 ±232	6.0% ±1.8 pp	7.9%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 12,837
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Households with people under 18	1,834 ±204	14.3% ±1.5 pp	32.4%	29.5%
Households without people under 18	11,003 ±558	85.7% ±3.3 pp	67.6%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 12,837
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
One-person nonfamily households	5,946 ±569	46.3% ±4.2 pp	24.3%	28.7%
Two-person households	4,594 ±412	35.8% ±3.0 pp	30.5%	33.8%
Three-person households	960 ±210	7.5% ±1.6 pp	16.7%	15.3%
Four-person households	800 ±191	6.2% ±1.5 pp	14.9%	12.6%
Five-person households	476 ±206	3.7% ±1.6 pp	7.7%	5.9%
Six-person households	61 ±45 · low precision	0.5% ±0.4 pp · low precision	3.3%	2.2%
Seven or more people	0 ±35 · low precision	0.0% ±0.3 pp · low precision	2.6%	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: 24,722
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Native	20,378 ±398	82.4% ±1.6 pp	73.0%	85.9%
Foreign born	4,344 ±398	17.6% ±1.6 pp	27.0%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 24,032
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
English only	19,121 ±561	79.6% ±2.2 pp	55.6%	77.7%
Spanish	1,619 ±387	6.7% ±1.6 pp	28.3%	13.6%
French, Haitian, or Cajun	70 ±61 · low precision	0.3% ±0.3 pp · low precision	0.4%	0.7%
German or other West Germanic	110 ±82 · low precision	0.5% ±0.3 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	239 ±87	1.0% ±0.4 pp	0.7%	0.7%
Other Indo-European	367 ±161	1.5% ±0.7 pp	3.5%	2.0%
Korean	857 ±256	3.6% ±1.1 pp	1.0%	0.3%
Chinese, including Mandarin and Cantonese	367 ±154	1.5% ±0.6 pp	3.5%	1.1%
Vietnamese	251 ±165 · low precision	1.0% ±0.7 pp · low precision	1.5%	0.5%
Tagalog, including Filipino	348 ±139	1.4% ±0.6 pp	2.1%	0.6%
Other Asian and Pacific Island	448 ±224	1.9% ±0.9 pp	2.0%	1.1%
Arabic	231 ±148 · low precision	1.0% ±0.6 pp · low precision	0.6%	0.5%
Other and unspecified	4 ±9 · low precision	0.0% ±0.0 pp · low precision	0.6%	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: 20,562
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Less than high school graduate	1,021 ±347	5.0% ±1.7 pp	15.3%	10.4%
High school graduate or equivalency	3,101 ±516	15.1% ±2.5 pp	20.5%	26.0%
Some college, no degree	3,979 ±404	19.4% ±1.9 pp	19.3%	19.1%
Associate’s degree	1,888 ±310	9.2% ±1.5 pp	7.9%	8.8%
Bachelor’s degree	6,100 ±481	29.7% ±2.3 pp	22.7%	21.6%
Graduate or professional degree	4,473 ±425	21.8% ±2.0 pp	14.4%	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: 24,601
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Same house	22,075 ±688	89.7% ±2.8 pp	89.2%	87.7%
Moved within same county	986 ±297	4.0% ±1.2 pp	6.4%	6.3%
Moved from a different county in the same state	1,044 ±604 · low precision	4.2% ±2.5 pp · low precision	2.6%	3.1%
Moved from a different state	318 ±186 · low precision	1.3% ±0.8 pp · low precision	1.1%	2.3%
Moved from abroad	178 ±182 · low precision	0.7% ±0.7 pp · low precision	0.7%	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

1.9% of Seal Beach residents (±0.9 percentage points) had no health insurance coverage when surveyed, compared with 6.6% in California and 8.4% nationally. 90.9% 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	Seal Beach	California	U.S.	Compared with California
People without health insurance Civilian noninstitutionalized population	1.9% ±0.9 pp	6.6%	8.4%	Lower
Households with a broadband subscription Households	90.9% ±2.0 pp	93.5%	91.0%	Lower
Veterans Civilian population age 18 and older	7.4% ±1.2 pp	4.3%	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 Seal Beach . 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 Seal Beach housing and cost context or return to the city profile.