Census tract · Mercer County
Census Tract 45.02, Mercer County, New Jersey
Census Tract 45.02, GEOID 34021004502, in Mercer County, New Jersey, entirely within Princeton. 1,021 residents in the ACS 2020-2024 5-year estimates (±234); the 2020 Census counted 1,154.
Residents, 2020-2024
1,021
±234 (90% margin)
2020 Census count: 1,154
Median household income
$139,922
±$101,707 (90% margin)
Mercer County: $100,645
Median home value
$1,937,500
±$570,632 (90% margin)
Mercer County: $377,700
Median gross rent
$357
±$242 (90% margin)
Mercer County: $1,623
Where is Census Tract 45.02?
Census Tract 45.02 is one of 84 census tracts in Mercer County, New Jersey. It covers 0.53 square miles of land, 2,198 residents per square mile in 2020. Its GEOID, 34021004502, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Princeton | 100% |
4 census tracts border Census Tract 45.02: Tract 40 ($110,375), Tract 42.03 ($244,038), Tract 42.04 ($207,207) and Tract 45.01 ($197,434). The figure in brackets is each tract's median household income.
Whether a tract counts as low- or moderate-income for bank lending (the Community Reinvestment Act) is set by the FFIEC against its metro area's family income: look it up in the FFIEC census geocoder.
Source: 2024 Gazetteer and 2020 block assignment files, U.S. Census Bureau · Census reference files
How many people live in Census Tract 45.02?
The 2020-2024 American Community Survey puts Census Tract 45.02's population at 1,021 (±234) in 451 households; the 2020 Census counted 1,154 residents and 574 housing units.
| Measure | Tract 45.02 | Princeton |
|---|---|---|
| Total population | 1,021 ±234 | 30,756 |
| Households | 451 ±96 | 9,300 |
| Average household size | 2.26 ±0.29 | 2.54 |
| Housing units | 520 ±101 | 9,906 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Census Tract 45.02?
The median resident of Census Tract 45.02 is 58.1 years old; 16.2% are under 18 and 37.7% are 65 or older. The largest group is non-Hispanic white residents at 73.4%, then non-Hispanic Asian residents at 18.3%. 26.7% of residents were born outside the United States.
| Measure | Tract 45.02 | Princeton |
|---|---|---|
| Median age | 58.1 ±2.2 | 28.5 |
| Under 18 years | 16.2% ±4.4 pts | 18.8% |
| 65 years and over | 37.7% ±10.0 pts | 13.0% |
| Hispanic or Latino (any race) | 3.3% ±3.5 pts | 8.0% |
| White alone, not Hispanic | 73.4% ±12.5 pts | 57.8% |
| Black or African American alone, not Hispanic | 0.5% ±0.8 pts | 6.1% |
| Asian alone, not Hispanic | 18.3% ±11.1 pts | 21.5% |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±4.3 pts | 0.3% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±4.3 pts | 0.0% |
| Two or more races, not Hispanic | 1.8% ±1.9 pts | 5.4% |
| Some other race alone, not Hispanic | 2.7% ±4.0 pts | 0.8% |
| Born outside the United States | 26.7% ±10.8 pts | 30.9% |
| Speak a language other than English at home (age 5+) | 27.8% ±11.3 pts | 35.2% |
| Civilian veterans (age 18+) | 4.0% ±2.5 pts | 1.6% |
| With a disability | 19.2% ±7.5 pts | 6.6% |
| No health insurance coverage | 0.9% ±1.3 pts | 1.8% |
| High school graduate or higher (age 25+) | 99.5% ±0.7 pts | 97.7% |
| Bachelor's degree or higher (age 25+) | 69.7% ±12.9 pts | 84.7% |
| Graduate or professional degree (age 25+) | 37.4% ±11.6 pts | 56.8% |
| Lived in the same house a year earlier | 90.4% ±6.4 pts | 77.0% |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Census Tract 45.02 earn?
The median household income for Census Tract 45.02 is published as $139,922 with a margin of ±$101,707, too wide to rely on. 18.1% of residents live below the poverty line.
| Measure | Tract 45.02 | Princeton |
|---|---|---|
| Median household income | $139,922 ±$101,707 | $192,079 |
| Mean household income | $352,089 ±$114,423 | $275,137 |
| Per capita income | $157,458 ±$41,262 | $87,301 |
| People below the poverty line | 18.1% ±10.9 pts | 6.1% |
| Children under 18 below the poverty line | 0.0% ±23.6 pts | 3.7% |
| Households receiving SNAP | 8.0% ±7.4 pts | 2.0% |
| Households with a computer | 100.0% ±9.5 pts | 99.4% |
| Households with a broadband subscription | 98.2% ±1.9 pts | 93.4% |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Census Tract 45.02?
Owners occupy 53.2% of Census Tract 45.02's occupied homes and renters 46.8%. The median owner-occupied home is valued at $1,937,500 by its owner (±$570,632).
| Measure | Tract 45.02 | Princeton |
|---|---|---|
| Median home value (owner-occupied) | $1,937,500 ±$570,632 | $1,050,600 |
| Median gross rent | $357 ±$242 | $2,636 |
| Renters paying 35% or more of income on rent | 24.5% ±15.2 pts | 30.7% |
| Median monthly owner costs, with a mortgage | $4,000 or more | $4,000 or more |
| Owner-occupied homes | 53.2% ±12.6 pts | 55.4% |
| Renter-occupied homes | 46.8% ±12.6 pts | 44.6% |
| Housing units | 520 ±101 | 9,906 |
| Single-family detached homes | 53.3% ±10.5 pts | 54.2% |
| Mobile homes | 0.0% ±8.3 pts | 0.0% |
| Built 2020 or later | 1.5% ±2.7 pts | 2.7% |
| Built 2010 to 2019 | 5.0% ±7.1 pts | 9.8% |
| Built 1939 or earlier | 39.8% ±10.2 pts | 23.3% |
| Households with no vehicle | 27.7% ±14.4 pts | 11.9% |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How do people in Census Tract 45.02 get to work?
27.8% of Census Tract 45.02's workers drive alone and 31.3% work from home. The average trip to work takes 34.6 minutes.
| Measure | Tract 45.02 | Princeton |
|---|---|---|
| In the labor force (age 16+) | 50.4% ±8.8 pts | 63.3% |
| Unemployment rate | 4.4% ±3.3 pts | 4.3% |
| Drove alone to work | 27.8% ±9.9 pts | 32.1% |
| Carpooled | 0.0% ±9.9 pts | 2.1% |
| Public transportation | 27.4% ±11.7 pts | 7.7% |
| Walked | 12.8% ±6.9 pts | 19.9% |
| Worked from home | 31.3% ±7.4 pts | 32.7% |
| Mean travel time to work | 34.6 min ±9.1 | 24.2 min |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
How does Census Tract 45.02 compare with the other tracts in Mercer County?
Among Mercer County's tracts with a reliable estimate, Census Tract 45.02 ranks as shown below (1 = highest).
| Measure | In Mercer County | In Princeton |
|---|---|---|
| Population | 83rd of 84 | 7th of 7 |
| Residents per square mile | 56th of 84 | 4th of 7 |
| Per capita income | 1st of 83 | 1st of 7 |
| Median home value | 1st of 76 | 1st of 7 |
| Poverty rate | 16th of 47 | 1st of 4 |
| Bachelor's degree or higher | 20th of 79 | 7th of 7 |
| Median age | 1st of 84 | 1st of 7 |
| Owner-occupied share | 55th of 81 | 4th of 7 |
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · How ranks are computed
How reliable are the figures for Census Tract 45.02?
4 of the 18 figures for Census Tract 45.02 on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
A census tract's figures rest on a few hundred sampled households over five years, so its margins are wider than a city's. Two tracts differ only when the gap between them is larger than their combined 90% margin (the square root of the sum of the two squared margins). How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · Check it at data.census.gov
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections