Rancho Cucamonga, California demographics

Rancho Cucamonga, CA demographics: median age 38.6; 37.5% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Rancho Cucamonga city, California · Incorporated city · GEOID 0659451. The survey estimates a population of 175,411 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Rancho Cucamonga is 38.6 years, with a 90% margin of error of 0.6 years. There are 58,835 households (±924). 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	38.6 ±0.6	37.9 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 175,411
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Under 18	39,507 ±1,601	22.5% ±0.9 pp	22.0%	22.0%
18–34	39,808 ±1,599	22.7% ±0.9 pp	23.9%	22.8%
35–64	70,603 ±2,098	40.3% ±1.2 pp	38.5%	38.0%
65 and older	25,493 ±1,268	14.5% ±0.7 pp	15.7%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 175,411
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Male	87,834 ±1,186	50.1% ±0.7 pp	49.9%	49.5%
Female	87,577 ±1,196	49.9% ±0.7 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: 175,411
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
White alone	70,580 ±2,219	40.2% ±1.3 pp	39.7%	61.0%
Black or African American alone	15,246 ±1,411	8.7% ±0.8 pp	5.4%	12.2%
American Indian and Alaska Native alone	2,378 ±698	1.4% ±0.4 pp	1.3%	0.9%
Asian alone	26,773 ±1,746	15.3% ±1.0 pp	15.5%	6.0%
Native Hawaiian and Other Pacific Islander alone	452 ±203	0.3% ±0.1 pp	0.4%	0.2%
Some other race alone	26,923 ±2,376	15.3% ±1.4 pp	18.5%	7.1%
Two or more races	33,059 ±2,276	18.8% ±1.3 pp	19.2%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 175,411
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Not Hispanic or Latino	108,602 ±2,088	61.9% ±1.2 pp	59.8%	80.7%
Hispanic or Latino	66,809 ±2,086	38.1% ±1.2 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: 58,835
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Married-couple family	32,480 ±937	55.2% ±1.3 pp	48.4%	46.9%
Other family: male householder, no spouse present	3,437 ±639	5.8% ±1.1 pp	6.3%	5.1%
Other family: female householder, no spouse present	7,985 ±635	13.6% ±1.1 pp	13.1%	12.2%
Nonfamily: householder living alone	11,599 ±1,002	19.7% ±1.7 pp	24.3%	28.7%
Nonfamily: householder not living alone	3,334 ±452	5.7% ±0.8 pp	7.9%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 58,835
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Households with people under 18	19,911 ±754	33.8% ±1.2 pp	32.4%	29.5%
Households without people under 18	38,924 ±1,291	66.2% ±1.9 pp	67.6%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 58,835
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
One-person nonfamily households	11,599 ±1,002	19.7% ±1.7 pp	24.3%	28.7%
Two-person households	17,884 ±935	30.4% ±1.5 pp	30.5%	33.8%
Three-person households	10,936 ±834	18.6% ±1.4 pp	16.7%	15.3%
Four-person households	10,219 ±807	17.4% ±1.3 pp	14.9%	12.6%
Five-person households	5,353 ±637	9.1% ±1.1 pp	7.7%	5.9%
Six-person households	1,680 ±269	2.9% ±0.5 pp	3.3%	2.2%
Seven or more people	1,164 ±229	2.0% ±0.4 pp	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: 175,411
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Native	138,968 ±1,638	79.2% ±0.9 pp	73.0%	85.9%
Foreign born	36,443 ±1,628	20.8% ±0.9 pp	27.0%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 164,189
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
English only	108,091 ±2,397	65.8% ±1.4 pp	55.6%	77.7%
Spanish	29,654 ±1,595	18.1% ±1.0 pp	28.3%	13.6%
French, Haitian, or Cajun	314 ±147	0.2% ±0.1 pp	0.4%	0.7%
German or other West Germanic	438 ±265 · low precision	0.3% ±0.2 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	55 ±47 · low precision	0.0% ±0.0 pp · low precision	0.7%	0.7%
Other Indo-European	3,232 ±562	2.0% ±0.3 pp	3.5%	2.0%
Korean	1,724 ±686	1.1% ±0.4 pp	1.0%	0.3%
Chinese, including Mandarin and Cantonese	8,425 ±1,122	5.1% ±0.7 pp	3.5%	1.1%
Vietnamese	1,105 ±364	0.7% ±0.2 pp	1.5%	0.5%
Tagalog, including Filipino	4,168 ±1,015	2.5% ±0.6 pp	2.1%	0.6%
Other Asian and Pacific Island	2,490 ±481	1.5% ±0.3 pp	2.0%	1.1%
Arabic	4,029 ±966	2.5% ±0.6 pp	0.6%	0.5%
Other and unspecified	464 ±197	0.3% ±0.1 pp	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: 122,165
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Less than high school graduate	10,427 ±822	8.5% ±0.7 pp	15.3%	10.4%
High school graduate or equivalency	25,384 ±1,655	20.8% ±1.3 pp	20.5%	26.0%
Some college, no degree	27,338 ±1,481	22.4% ±1.2 pp	19.3%	19.1%
Associate’s degree	13,182 ±1,044	10.8% ±0.8 pp	7.9%	8.8%
Bachelor’s degree	28,004 ±1,501	22.9% ±1.2 pp	22.7%	21.6%
Graduate or professional degree	17,830 ±1,232	14.6% ±1.0 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: 173,693
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Same house	156,056 ±1,743	89.8% ±1.0 pp	89.2%	87.7%
Moved within same county	9,002 ±1,187	5.2% ±0.7 pp	6.4%	6.3%
Moved from a different county in the same state	5,658 ±940	3.3% ±0.5 pp	2.6%	3.1%
Moved from a different state	2,269 ±646	1.3% ±0.4 pp	1.1%	2.3%
Moved from abroad	708 ±274	0.4% ±0.2 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

5.0% of Rancho Cucamonga residents (±0.5 percentage points) had no health insurance coverage when surveyed, compared with 6.6% in California and 8.4% nationally. 94.8% 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	Rancho Cucamonga	California	U.S.	Compared with California
People without health insurance Civilian noninstitutionalized population	5.0% ±0.5 pp	6.6%	8.4%	Lower
Households with a broadband subscription Households	94.8% ±0.4 pp	93.5%	91.0%	Higher
Veterans Civilian population age 18 and older	5.1% ±0.5 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 Rancho Cucamonga . 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 Rancho Cucamonga housing and cost context or return to the city profile.