Aliso Viejo, California demographics

Aliso Viejo, CA demographics: median age 39.2; 57.6% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Aliso Viejo city, California · Incorporated city · GEOID 0600947. The survey estimates a population of 51,113 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Aliso Viejo is 39.2 years, with a 90% margin of error of 0.9 years. There are 19,633 households (±594). 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	39.2 ±0.9	37.9 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 51,113
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Under 18	11,719 ±982	22.9% ±1.9 pp	22.0%	22.0%
18–34	10,326 ±856	20.2% ±1.7 pp	23.9%	22.8%
35–64	23,044 ±1,218	45.1% ±2.4 pp	38.5%	38.0%
65 and older	6,024 ±624	11.8% ±1.2 pp	15.7%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 51,113
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Male	24,149 ±732	47.2% ±1.4 pp	49.9%	49.5%
Female	26,964 ±731	52.8% ±1.4 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: 51,113
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
White alone	29,692 ±1,578	58.1% ±3.1 pp	39.7%	61.0%
Black or African American alone	1,040 ±363	2.0% ±0.7 pp	5.4%	12.2%
American Indian and Alaska Native alone	90 ±64 · low precision	0.2% ±0.1 pp · low precision	1.3%	0.9%
Asian alone	8,515 ±1,145	16.7% ±2.2 pp	15.5%	6.0%
Native Hawaiian and Other Pacific Islander alone	18 ±27 · low precision	0.0% ±0.1 pp · low precision	0.4%	0.2%
Some other race alone	3,400 ±930	6.7% ±1.8 pp	18.5%	7.1%
Two or more races	8,358 ±1,006	16.4% ±2.0 pp	19.2%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 51,113
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Not Hispanic or Latino	41,307 ±1,340	80.8% ±2.6 pp	59.8%	80.7%
Hispanic or Latino	9,806 ±1,329	19.2% ±2.6 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: 19,633
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Married-couple family	10,355 ±462	52.7% ±1.7 pp	48.4%	46.9%
Other family: male householder, no spouse present	666 ±252	3.4% ±1.3 pp	6.3%	5.1%
Other family: female householder, no spouse present	1,983 ±316	10.1% ±1.6 pp	13.1%	12.2%
Nonfamily: householder living alone	5,288 ±609	26.9% ±3.0 pp	24.3%	28.7%
Nonfamily: householder not living alone	1,341 ±272	6.8% ±1.4 pp	7.9%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 19,633
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Households with people under 18	6,546 ±387	33.3% ±1.7 pp	32.4%	29.5%
Households without people under 18	13,087 ±827	66.7% ±3.7 pp	67.6%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 19,633
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
One-person nonfamily households	5,288 ±609	26.9% ±3.0 pp	24.3%	28.7%
Two-person households	6,194 ±592	31.5% ±2.9 pp	30.5%	33.8%
Three-person households	3,499 ±472	17.8% ±2.3 pp	16.7%	15.3%
Four-person households	3,210 ±402	16.4% ±2.0 pp	14.9%	12.6%
Five-person households	1,031 ±351	5.3% ±1.8 pp	7.7%	5.9%
Six-person households	303 ±162 · low precision	1.5% ±0.8 pp · low precision	3.3%	2.2%
Seven or more people	108 ±89 · low precision	0.6% ±0.5 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: 51,113
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Native	38,115 ±1,164	74.6% ±2.3 pp	73.0%	85.9%
Foreign born	12,998 ±1,160	25.4% ±2.3 pp	27.0%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 48,054
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
English only	31,151 ±1,439	64.8% ±2.9 pp	55.6%	77.7%
Spanish	5,215 ±885	10.9% ±1.8 pp	28.3%	13.6%
French, Haitian, or Cajun	506 ±310 · low precision	1.1% ±0.6 pp · low precision	0.4%	0.7%
German or other West Germanic	541 ±369 · low precision	1.1% ±0.8 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	717 ±274	1.5% ±0.6 pp	0.7%	0.7%
Other Indo-European	4,272 ±1,142	8.9% ±2.4 pp	3.5%	2.0%
Korean	823 ±333	1.7% ±0.7 pp	1.0%	0.3%
Chinese, including Mandarin and Cantonese	1,394 ±373	2.9% ±0.8 pp	3.5%	1.1%
Vietnamese	645 ±269	1.3% ±0.6 pp	1.5%	0.5%
Tagalog, including Filipino	1,098 ±754 · low precision	2.3% ±1.6 pp · low precision	2.1%	0.6%
Other Asian and Pacific Island	912 ±282	1.9% ±0.6 pp	2.0%	1.1%
Arabic	627 ±418 · low precision	1.3% ±0.9 pp · low precision	0.6%	0.5%
Other and unspecified	153 ±167 · low precision	0.3% ±0.3 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: 35,732
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Less than high school graduate	1,415 ±438	4.0% ±1.2 pp	15.3%	10.4%
High school graduate or equivalency	4,682 ±596	13.1% ±1.7 pp	20.5%	26.0%
Some college, no degree	6,218 ±714	17.4% ±2.0 pp	19.3%	19.1%
Associate’s degree	2,845 ±457	8.0% ±1.3 pp	7.9%	8.8%
Bachelor’s degree	12,793 ±843	35.8% ±2.3 pp	22.7%	21.6%
Graduate or professional degree	7,779 ±831	21.8% ±2.3 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: 50,512
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Same house	44,718 ±1,142	88.5% ±2.2 pp	89.2%	87.7%
Moved within same county	3,643 ±817	7.2% ±1.6 pp	6.4%	6.3%
Moved from a different county in the same state	726 ±319	1.4% ±0.6 pp	2.6%	3.1%
Moved from a different state	1,040 ±494	2.1% ±1.0 pp	1.1%	2.3%
Moved from abroad	385 ±185	0.8% ±0.4 pp	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

4.2% of Aliso Viejo residents (±0.9 percentage points) had no health insurance coverage when surveyed, compared with 6.6% in California and 8.4% nationally. 98.3% 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	Aliso Viejo	California	U.S.	Compared with California
People without health insurance Civilian noninstitutionalized population	4.2% ±0.9 pp	6.6%	8.4%	Lower
Households with a broadband subscription Households	98.3% ±1.1 pp	93.5%	91.0%	Higher
Veterans Civilian population age 18 and older	3.5% ±0.7 pp	4.3%	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 Aliso Viejo . 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 Aliso Viejo housing and cost context or return to the city profile.