Princeton, New Jersey demographics

Princeton, NJ demographics: median age 28.5; 84.7% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Princeton, New Jersey · Census PEP place · GEOID 3460900. The survey estimates a population of 30,756 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Princeton is 28.5 years, with a 90% margin of error of 1.5 years. There are 9,300 households (±378). 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	28.5 ±1.5	40.1 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 30,756
Category	Count ± MOE	Share ± MOE (pp)	New Jersey	U.S.
Under 18	5,789 ±610	18.8% ±2.0 pp	21.8%	22.0%
18–34	11,233 ±809	36.5% ±2.6 pp	21.3%	22.8%
35–64	9,735 ±743	31.7% ±2.4 pp	39.7%	38.0%
65 and older	3,999 ±351	13.0% ±1.1 pp	17.2%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 30,756
Category	Count ± MOE	Share ± MOE (pp)	New Jersey	U.S.
Male	15,167 ±453	49.3% ±1.5 pp	49.2%	49.5%
Female	15,589 ±450	50.7% ±1.5 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: 30,756
Category	Count ± MOE	Share ± MOE (pp)	New Jersey	U.S.
White alone	18,502 ±911	60.2% ±3.0 pp	54.0%	61.0%
Black or African American alone	1,983 ±347	6.4% ±1.1 pp	12.8%	12.2%
American Indian and Alaska Native alone	286 ±211 · low precision	0.9% ±0.7 pp · low precision	0.6%	0.9%
Asian alone	6,701 ±659	21.8% ±2.1 pp	10.1%	6.0%
Native Hawaiian and Other Pacific Islander alone	13 ±19 · low precision	0.0% ±0.1 pp · low precision	0.0%	0.2%
Some other race alone	775 ±258	2.5% ±0.8 pp	10.1%	7.1%
Two or more races	2,496 ±394	8.1% ±1.3 pp	12.4%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 30,756
Category	Count ± MOE	Share ± MOE (pp)	New Jersey	U.S.
Not Hispanic or Latino	28,299 ±491	92.0% ±1.6 pp	77.5%	80.7%
Hispanic or Latino	2,457 ±479	8.0% ±1.6 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: 9,300
Category	Count ± MOE	Share ± MOE (pp)	New Jersey	U.S.
Married-couple family	5,476 ±344	58.9% ±2.8 pp	49.8%	46.9%
Other family: male householder, no spouse present	204 ±176 · low precision	2.2% ±1.9 pp · low precision	5.1%	5.1%
Other family: female householder, no spouse present	614 ±163	6.6% ±1.7 pp	12.9%	12.2%
Nonfamily: householder living alone	2,429 ±361	26.1% ±3.7 pp	26.4%	28.7%
Nonfamily: householder not living alone	577 ±141	6.2% ±1.5 pp	5.8%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 9,300
Category	Count ± MOE	Share ± MOE (pp)	New Jersey	U.S.
Households with people under 18	3,308 ±299	35.6% ±2.9 pp	31.2%	29.5%
Households without people under 18	5,992 ±465	64.4% ±4.3 pp	68.8%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 9,300
Category	Count ± MOE	Share ± MOE (pp)	New Jersey	U.S.
One-person nonfamily households	2,429 ±361	26.1% ±3.7 pp	26.4%	28.7%
Two-person households	2,682 ±355	28.8% ±3.6 pp	31.1%	33.8%
Three-person households	1,673 ±256	18.0% ±2.7 pp	17.1%	15.3%
Four-person households	1,907 ±307	20.5% ±3.2 pp	15.2%	12.6%
Five-person households	477 ±133	5.1% ±1.4 pp	6.3%	5.9%
Six-person households	120 ±56	1.3% ±0.6 pp	2.3%	2.2%
Seven or more people	12 ±33 · low precision	0.1% ±0.4 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: 30,756
Category	Count ± MOE	Share ± MOE (pp)	New Jersey	U.S.
Native	21,265 ±747	69.1% ±2.4 pp	76.1%	85.9%
Foreign born	9,491 ±751	30.9% ±2.4 pp	23.9%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 29,827
Category	Count ± MOE	Share ± MOE (pp)	New Jersey	U.S.
English only	19,342 ±967	64.8% ±3.2 pp	66.9%	77.7%
Spanish	1,815 ±658	6.1% ±2.2 pp	17.2%	13.6%
French, Haitian, or Cajun	1,189 ±637 · low precision	4.0% ±2.1 pp · low precision	1.1%	0.7%
German or other West Germanic	446 ±146	1.5% ±0.5 pp	0.4%	0.5%
Russian, Polish, or other Slavic	425 ±157	1.4% ±0.5 pp	1.7%	0.7%
Other Indo-European	1,633 ±319	5.5% ±1.1 pp	5.6%	2.0%
Korean	427 ±164	1.4% ±0.5 pp	0.9%	0.3%
Chinese, including Mandarin and Cantonese	2,803 ±438	9.4% ±1.5 pp	1.5%	1.1%
Vietnamese	115 ±65 · low precision	0.4% ±0.2 pp · low precision	0.2%	0.5%
Tagalog, including Filipino	78 ±55 · low precision	0.3% ±0.2 pp · low precision	0.9%	0.6%
Other Asian and Pacific Island	912 ±342	3.1% ±1.1 pp	1.6%	1.1%
Arabic	125 ±62	0.4% ±0.2 pp	0.9%	0.5%
Other and unspecified	517 ±215	1.7% ±0.7 pp	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: 17,082
Category	Count ± MOE	Share ± MOE (pp)	New Jersey	U.S.
Less than high school graduate	387 ±155	2.3% ±0.9 pp	9.3%	10.4%
High school graduate or equivalency	819 ±220	4.8% ±1.3 pp	25.3%	26.0%
Some college, no degree	923 ±223	5.4% ±1.3 pp	15.0%	19.1%
Associate’s degree	483 ±175	2.8% ±1.0 pp	6.7%	8.8%
Bachelor’s degree	4,770 ±633	27.9% ±3.6 pp	26.1%	21.6%
Graduate or professional degree	9,700 ±650	56.8% ±3.5 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: 30,593
Category	Count ± MOE	Share ± MOE (pp)	New Jersey	U.S.
Same house	23,557 ±662	77.0% ±2.1 pp	90.4%	87.7%
Moved within same county	1,468 ±407	4.8% ±1.3 pp	4.4%	6.3%
Moved from a different county in the same state	1,660 ±478	5.4% ±1.6 pp	2.5%	3.1%
Moved from a different state	2,514 ±326	8.2% ±1.1 pp	1.8%	2.3%
Moved from abroad	1,394 ±336	4.6% ±1.1 pp	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

1.8% of Princeton residents (±0.6 percentage points) had no health insurance coverage when surveyed, compared with 7.5% in New Jersey and 8.4% nationally. 93.4% 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	Princeton	New Jersey	U.S.	Compared with New Jersey
People without health insurance Civilian noninstitutionalized population	1.8% ±0.6 pp	7.5%	8.4%	Lower
Households with a broadband subscription Households	93.4% ±3.1 pp	92.8%	91.0%	Not statistically different
Veterans Civilian population age 18 and older	1.6% ±0.5 pp	3.7%	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 Princeton . 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 Princeton housing and cost context or return to the city profile.