Flemington, New Jersey demographics

Flemington, NJ demographics: median age 34.2; 39.8% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Flemington borough, New Jersey · Incorporated borough · GEOID 3423700. The survey estimates a population of 4,896 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Flemington is 34.2 years, with a 90% margin of error of 2.4 years. There are 2,119 households (±188). 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	34.2 ±2.4	40.1 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 4,896
Category	Count ± MOE	Share ± MOE (pp)	New Jersey	U.S.
Under 18	961 ±236	19.6% ±4.8 pp	21.8%	22.0%
18–34	1,590 ±382	32.5% ±7.8 pp	21.3%	22.8%
35–64	1,675 ±275	34.2% ±5.6 pp	39.7%	38.0%
65 and older	670 ±183	13.7% ±3.7 pp	17.2%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 4,896
Category	Count ± MOE	Share ± MOE (pp)	New Jersey	U.S.
Male	2,215 ±187	45.2% ±3.8 pp	49.2%	49.5%
Female	2,681 ±186	54.8% ±3.8 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: 4,896
Category	Count ± MOE	Share ± MOE (pp)	New Jersey	U.S.
White alone	2,749 ±412	56.1% ±8.4 pp	54.0%	61.0%
Black or African American alone	131 ±110 · low precision	2.7% ±2.2 pp · low precision	12.8%	12.2%
American Indian and Alaska Native alone	0 ±14 · low precision	0.0% ±0.3 pp · low precision	0.6%	0.9%
Asian alone	366 ±219 · low precision	7.5% ±4.5 pp · low precision	10.1%	6.0%
Native Hawaiian and Other Pacific Islander alone	0 ±14 · low precision	0.0% ±0.3 pp · low precision	0.0%	0.2%
Some other race alone	1,295 ±406	26.5% ±8.3 pp	10.1%	7.1%
Two or more races	355 ±229 · low precision	7.3% ±4.7 pp · low precision	12.4%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 4,896
Category	Count ± MOE	Share ± MOE (pp)	New Jersey	U.S.
Not Hispanic or Latino	3,228 ±433	65.9% ±8.8 pp	77.5%	80.7%
Hispanic or Latino	1,668 ±429	34.1% ±8.8 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: 2,119
Category	Count ± MOE	Share ± MOE (pp)	New Jersey	U.S.
Married-couple family	858 ±159	40.5% ±6.6 pp	49.8%	46.9%
Other family: male householder, no spouse present	88 ±74 · low precision	4.2% ±3.5 pp · low precision	5.1%	5.1%
Other family: female householder, no spouse present	285 ±125	13.4% ±5.8 pp	12.9%	12.2%
Nonfamily: householder living alone	758 ±225	35.8% ±10.1 pp	26.4%	28.7%
Nonfamily: householder not living alone	130 ±76 · low precision	6.1% ±3.5 pp · low precision	5.8%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 2,119
Category	Count ± MOE	Share ± MOE (pp)	New Jersey	U.S.
Households with people under 18	609 ±125	28.7% ±5.3 pp	31.2%	29.5%
Households without people under 18	1,510 ±237	71.3% ±9.2 pp	68.8%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 2,119
Category	Count ± MOE	Share ± MOE (pp)	New Jersey	U.S.
One-person nonfamily households	758 ±225	35.8% ±10.1 pp	26.4%	28.7%
Two-person households	654 ±182	30.9% ±8.1 pp	31.1%	33.8%
Three-person households	377 ±139	17.8% ±6.4 pp	17.1%	15.3%
Four-person households	122 ±73 · low precision	5.8% ±3.4 pp · low precision	15.2%	12.6%
Five-person households	162 ±91 · low precision	7.6% ±4.2 pp · low precision	6.3%	5.9%
Six-person households	18 ±30 · low precision	0.8% ±1.4 pp · low precision	2.3%	2.2%
Seven or more people	28 ±45 · low precision	1.3% ±2.1 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: 4,896
Category	Count ± MOE	Share ± MOE (pp)	New Jersey	U.S.
Native	3,375 ±347	68.9% ±7.1 pp	76.1%	85.9%
Foreign born	1,521 ±343	31.1% ±7.0 pp	23.9%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 4,531
Category	Count ± MOE	Share ± MOE (pp)	New Jersey	U.S.
English only	2,694 ±438	59.5% ±9.5 pp	66.9%	77.7%
Spanish	1,443 ±374	31.8% ±8.2 pp	17.2%	13.6%
French, Haitian, or Cajun	0 ±14 · low precision	0.0% ±0.3 pp · low precision	1.1%	0.7%
German or other West Germanic	20 ±31 · low precision	0.4% ±0.7 pp · low precision	0.4%	0.5%
Russian, Polish, or other Slavic	18 ±28 · low precision	0.4% ±0.6 pp · low precision	1.7%	0.7%
Other Indo-European	96 ±88 · low precision	2.1% ±1.9 pp · low precision	5.6%	2.0%
Korean	36 ±64 · low precision	0.8% ±1.4 pp · low precision	0.9%	0.3%
Chinese, including Mandarin and Cantonese	0 ±14 · low precision	0.0% ±0.3 pp · low precision	1.5%	1.1%
Vietnamese	5 ±9 · low precision	0.1% ±0.2 pp · low precision	0.2%	0.5%
Tagalog, including Filipino	111 ±105 · low precision	2.4% ±2.3 pp · low precision	0.9%	0.6%
Other Asian and Pacific Island	49 ±68 · low precision	1.1% ±1.5 pp · low precision	1.6%	1.1%
Arabic	59 ±89 · low precision	1.3% ±2.0 pp · low precision	0.9%	0.5%
Other and unspecified	0 ±14 · low precision	0.0% ±0.3 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: 3,255
Category	Count ± MOE	Share ± MOE (pp)	New Jersey	U.S.
Less than high school graduate	342 ±158	10.5% ±4.8 pp	9.3%	10.4%
High school graduate or equivalency	1,060 ±249	32.6% ±7.2 pp	25.3%	26.0%
Some college, no degree	316 ±122	9.7% ±3.7 pp	15.0%	19.1%
Associate’s degree	240 ±163 · low precision	7.4% ±5.0 pp · low precision	6.7%	8.8%
Bachelor’s degree	891 ±189	27.4% ±5.4 pp	26.1%	21.6%
Graduate or professional degree	406 ±156	12.5% ±4.7 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: 4,769
Category	Count ± MOE	Share ± MOE (pp)	New Jersey	U.S.
Same house	4,185 ±238	87.8% ±4.7 pp	90.4%	87.7%
Moved within same county	261 ±175 · low precision	5.5% ±3.7 pp · low precision	4.4%	6.3%
Moved from a different county in the same state	129 ±139 · low precision	2.7% ±2.9 pp · low precision	2.5%	3.1%
Moved from a different state	39 ±52 · low precision	0.8% ±1.1 pp · low precision	1.8%	2.3%
Moved from abroad	155 ±152 · low precision	3.3% ±3.2 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

8.8% of Flemington residents (±3.7 percentage points) had no health insurance coverage when surveyed, compared with 7.5% in New Jersey and 8.4% nationally. 84.8% 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	Flemington	New Jersey	U.S.	Compared with New Jersey
People without health insurance Civilian noninstitutionalized population	8.8% ±3.7 pp	7.5%	8.4%	Not statistically different
Households with a broadband subscription Households	84.8% ±5.9 pp	92.8%	91.0%	Lower
Veterans Civilian population age 18 and older	4.6% ±2.8 pp · low precision	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 Flemington . 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 Flemington housing and cost context or return to the city profile.