Somerville, New Jersey demographics

Somerville, NJ demographics: median age 35.9; 54.7% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Somerville borough, New Jersey · Incorporated borough · GEOID 3468460. The survey estimates a population of 13,410 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Somerville is 35.9 years, with a 90% margin of error of 1.3 years. There are 5,980 households (±306). 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	35.9 ±1.3	40.1 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 13,410
Category	Count ± MOE	Share ± MOE (pp)	New Jersey	U.S.
Under 18	2,153 ±418	16.1% ±3.1 pp	21.8%	22.0%
18–34	4,281 ±457	31.9% ±3.4 pp	21.3%	22.8%
35–64	5,029 ±509	37.5% ±3.8 pp	39.7%	38.0%
65 and older	1,947 ±353	14.5% ±2.6 pp	17.2%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 13,410
Category	Count ± MOE	Share ± MOE (pp)	New Jersey	U.S.
Male	6,798 ±338	50.7% ±2.5 pp	49.2%	49.5%
Female	6,612 ±338	49.3% ±2.5 pp	50.8%	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: 13,410
Category	Count ± MOE	Share ± MOE (pp)	New Jersey	U.S.
White alone	7,708 ±683	57.5% ±5.1 pp	54.0%	61.0%
Black or African American alone	1,535 ±705	11.4% ±5.3 pp	12.8%	12.2%
American Indian and Alaska Native alone	54 ±54 · low precision	0.4% ±0.4 pp · low precision	0.6%	0.9%
Asian alone	1,502 ±385	11.2% ±2.9 pp	10.1%	6.0%
Native Hawaiian and Other Pacific Islander alone	0 ±22 · low precision	0.0% ±0.2 pp · low precision	0.0%	0.2%
Some other race alone	1,374 ±297	10.2% ±2.2 pp	10.1%	7.1%
Two or more races	1,237 ±323	9.2% ±2.4 pp	12.4%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 13,410
Category	Count ± MOE	Share ± MOE (pp)	New Jersey	U.S.
Not Hispanic or Latino	10,575 ±404	78.9% ±3.0 pp	77.5%	80.7%
Hispanic or Latino	2,835 ±402	21.1% ±3.0 pp	22.5%	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: 5,980
Category	Count ± MOE	Share ± MOE (pp)	New Jersey	U.S.
Married-couple family	2,333 ±277	39.0% ±4.2 pp	49.8%	46.9%
Other family: male householder, no spouse present	182 ±85	3.0% ±1.4 pp	5.1%	5.1%
Other family: female householder, no spouse present	698 ±254	11.7% ±4.2 pp	12.9%	12.2%
Nonfamily: householder living alone	2,012 ±313	33.6% ±4.9 pp	26.4%	28.7%
Nonfamily: householder not living alone	755 ±251	12.6% ±4.1 pp	5.8%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 5,980
Category	Count ± MOE	Share ± MOE (pp)	New Jersey	U.S.
Households with people under 18	1,538 ±285	25.7% ±4.6 pp	31.2%	29.5%
Households without people under 18	4,442 ±439	74.3% ±6.3 pp	68.8%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 5,980
Category	Count ± MOE	Share ± MOE (pp)	New Jersey	U.S.
One-person nonfamily households	2,012 ±313	33.6% ±4.9 pp	26.4%	28.7%
Two-person households	1,949 ±357	32.6% ±5.7 pp	31.1%	33.8%
Three-person households	1,217 ±262	20.4% ±4.3 pp	17.1%	15.3%
Four-person households	566 ±162	9.5% ±2.7 pp	15.2%	12.6%
Five-person households	207 ±87	3.5% ±1.4 pp	6.3%	5.9%
Six-person households	29 ±39 · low precision	0.5% ±0.6 pp · low precision	2.3%	2.2%
Seven or more people	0 ±31 · low precision	0.0% ±0.5 pp · low precision	1.6%	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: 13,410
Category	Count ± MOE	Share ± MOE (pp)	New Jersey	U.S.
Native	10,199 ±452	76.1% ±3.4 pp	76.1%	85.9%
Foreign born	3,211 ±451	23.9% ±3.4 pp	23.9%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 12,740
Category	Count ± MOE	Share ± MOE (pp)	New Jersey	U.S.
English only	8,464 ±646	66.4% ±4.9 pp	66.9%	77.7%
Spanish	2,211 ±405	17.4% ±3.2 pp	17.2%	13.6%
French, Haitian, or Cajun	522 ±659 · low precision	4.1% ±5.2 pp · low precision	1.1%	0.7%
German or other West Germanic	19 ±39 · low precision	0.1% ±0.3 pp · low precision	0.4%	0.5%
Russian, Polish, or other Slavic	159 ±102 · low precision	1.2% ±0.8 pp · low precision	1.7%	0.7%
Other Indo-European	451 ±197	3.5% ±1.5 pp	5.6%	2.0%
Korean	38 ±58 · low precision	0.3% ±0.5 pp · low precision	0.9%	0.3%
Chinese, including Mandarin and Cantonese	110 ±68 · low precision	0.9% ±0.5 pp · low precision	1.5%	1.1%
Vietnamese	27 ±33 · low precision	0.2% ±0.3 pp · low precision	0.2%	0.5%
Tagalog, including Filipino	374 ±148	2.9% ±1.2 pp	0.9%	0.6%
Other Asian and Pacific Island	235 ±207 · low precision	1.8% ±1.6 pp · low precision	1.6%	1.1%
Arabic	26 ±40 · low precision	0.2% ±0.3 pp · low precision	0.9%	0.5%
Other and unspecified	104 ±79 · low precision	0.8% ±0.6 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: 10,083
Category	Count ± MOE	Share ± MOE (pp)	New Jersey	U.S.
Less than high school graduate	587 ±230	5.8% ±2.3 pp	9.3%	10.4%
High school graduate or equivalency	2,350 ±334	23.3% ±3.2 pp	25.3%	26.0%
Some college, no degree	1,283 ±256	12.7% ±2.5 pp	15.0%	19.1%
Associate’s degree	346 ±127	3.4% ±1.3 pp	6.7%	8.8%
Bachelor’s degree	3,370 ±411	33.4% ±3.9 pp	26.1%	21.6%
Graduate or professional degree	2,147 ±399	21.3% ±3.9 pp	17.6%	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: 13,329
Category	Count ± MOE	Share ± MOE (pp)	New Jersey	U.S.
Same house	11,054 ±591	82.9% ±4.4 pp	90.4%	87.7%
Moved within same county	947 ±475 · low precision	7.1% ±3.6 pp · low precision	4.4%	6.3%
Moved from a different county in the same state	705 ±216	5.3% ±1.6 pp	2.5%	3.1%
Moved from a different state	539 ±275 · low precision	4.0% ±2.1 pp · low precision	1.8%	2.3%
Moved from abroad	84 ±105 · low precision	0.6% ±0.8 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

7.5% of Somerville residents (±2.2 percentage points) had no health insurance coverage when surveyed, compared with 7.5% in New Jersey and 8.4% nationally. 92.6% 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	Somerville	New Jersey	U.S.	Compared with New Jersey
People without health insurance Civilian noninstitutionalized population	7.5% ±2.2 pp	7.5%	8.4%	Not statistically different
Households with a broadband subscription Households	92.6% ±2.3 pp	92.8%	91.0%	Not statistically different
Veterans Civilian population age 18 and older	4.9% ±2.0 pp	3.7%	6.2%	Not statistically different

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