South El Monte, California demographics

South El Monte, CA demographics: median age 37.2; 10.5% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · South El Monte city, California · Incorporated city · GEOID 0672996. The survey estimates a population of 19,287 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in South El Monte is 37.2 years, with a 90% margin of error of 2.5 years. There are 5,087 households (±290). 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	37.2 ±2.5	37.9 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 19,287
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Under 18	4,678 ±502	24.3% ±2.6 pp	22.0%	22.0%
18–34	4,462 ±440	23.1% ±2.3 pp	23.9%	22.8%
35–64	7,161 ±577	37.1% ±3.0 pp	38.5%	38.0%
65 and older	2,986 ±390	15.5% ±2.0 pp	15.7%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 19,287
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Male	9,574 ±393	49.6% ±2.0 pp	49.9%	49.5%
Female	9,713 ±397	50.4% ±2.0 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: 19,287
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
White alone	2,061 ±650	10.7% ±3.4 pp	39.7%	61.0%
Black or African American alone	179 ±147 · low precision	0.9% ±0.8 pp · low precision	5.4%	12.2%
American Indian and Alaska Native alone	205 ±162 · low precision	1.1% ±0.8 pp · low precision	1.3%	0.9%
Asian alone	3,961 ±710	20.5% ±3.7 pp	15.5%	6.0%
Native Hawaiian and Other Pacific Islander alone	0 ±21 · low precision	0.0% ±0.1 pp · low precision	0.4%	0.2%
Some other race alone	8,652 ±1,058	44.9% ±5.5 pp	18.5%	7.1%
Two or more races	4,229 ±914	21.9% ±4.7 pp	19.2%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 19,287
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Not Hispanic or Latino	4,954 ±778	25.7% ±4.0 pp	59.8%	80.7%
Hispanic or Latino	14,333 ±786	74.3% ±4.1 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: 5,087
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Married-couple family	2,435 ±244	47.9% ±3.9 pp	48.4%	46.9%
Other family: male householder, no spouse present	655 ±170	12.9% ±3.3 pp	6.3%	5.1%
Other family: female householder, no spouse present	1,212 ±208	23.8% ±3.9 pp	13.1%	12.2%
Nonfamily: householder living alone	660 ±245	13.0% ±4.8 pp	24.3%	28.7%
Nonfamily: householder not living alone	125 ±59	2.5% ±1.2 pp	7.9%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 5,087
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Households with people under 18	2,102 ±178	41.3% ±2.6 pp	32.4%	29.5%
Households without people under 18	2,985 ±351	58.7% ±6.0 pp	67.6%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 5,087
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
One-person nonfamily households	660 ±245	13.0% ±4.8 pp	24.3%	28.7%
Two-person households	976 ±230	19.2% ±4.4 pp	30.5%	33.8%
Three-person households	1,052 ±220	20.7% ±4.2 pp	16.7%	15.3%
Four-person households	898 ±169	17.7% ±3.2 pp	14.9%	12.6%
Five-person households	755 ±179	14.8% ±3.4 pp	7.7%	5.9%
Six-person households	438 ±146	8.6% ±2.8 pp	3.3%	2.2%
Seven or more people	308 ±87	6.1% ±1.7 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: 19,287
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Native	10,501 ±575	54.4% ±3.0 pp	73.0%	85.9%
Foreign born	8,786 ±571	45.6% ±3.0 pp	27.0%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 18,074
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
English only	3,354 ±522	18.6% ±2.9 pp	55.6%	77.7%
Spanish	11,178 ±686	61.8% ±3.6 pp	28.3%	13.6%
French, Haitian, or Cajun	0 ±21 · low precision	0.0% ±0.1 pp · low precision	0.4%	0.7%
German or other West Germanic	0 ±21 · low precision	0.0% ±0.1 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	0 ±21 · low precision	0.0% ±0.1 pp · low precision	0.7%	0.7%
Other Indo-European	55 ±71 · low precision	0.3% ±0.4 pp · low precision	3.5%	2.0%
Korean	150 ±164 · low precision	0.8% ±0.9 pp · low precision	1.0%	0.3%
Chinese, including Mandarin and Cantonese	1,990 ±556	11.0% ±3.1 pp	3.5%	1.1%
Vietnamese	662 ±243	3.7% ±1.3 pp	1.5%	0.5%
Tagalog, including Filipino	102 ±84 · low precision	0.6% ±0.5 pp · low precision	2.1%	0.6%
Other Asian and Pacific Island	331 ±257 · low precision	1.8% ±1.4 pp · low precision	2.0%	1.1%
Arabic	240 ±242 · low precision	1.3% ±1.3 pp · low precision	0.6%	0.5%
Other and unspecified	12 ±16 · low precision	0.1% ±0.1 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: 12,947
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Less than high school graduate	5,814 ±629	44.9% ±4.5 pp	15.3%	10.4%
High school graduate or equivalency	3,028 ±445	23.4% ±3.3 pp	20.5%	26.0%
Some college, no degree	2,271 ±347	17.5% ±2.6 pp	19.3%	19.1%
Associate’s degree	475 ±138	3.7% ±1.1 pp	7.9%	8.8%
Bachelor’s degree	1,089 ±280	8.4% ±2.1 pp	22.7%	21.6%
Graduate or professional degree	270 ±85	2.1% ±0.7 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: 18,971
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Same house	18,205 ±274	96.0% ±1.2 pp	89.2%	87.7%
Moved within same county	699 ±250	3.7% ±1.3 pp	6.4%	6.3%
Moved from a different county in the same state	33 ±26 · low precision	0.2% ±0.1 pp · low precision	2.6%	3.1%
Moved from a different state	0 ±21 · low precision	0.0% ±0.1 pp · low precision	1.1%	2.3%
Moved from abroad	34 ±33 · low precision	0.2% ±0.2 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

13.0% of South El Monte residents (±2.2 percentage points) had no health insurance coverage when surveyed, compared with 6.6% in California and 8.4% nationally. 88.4% 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	South El Monte	California	U.S.	Compared with California
People without health insurance Civilian noninstitutionalized population	13.0% ±2.2 pp	6.6%	8.4%	Higher
Households with a broadband subscription Households	88.4% ±0.4 pp	93.5%	91.0%	Lower
Veterans Civilian population age 18 and older	2.4% ±1.0 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 South El Monte . 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 South El Monte housing and cost context or return to the city profile.