Census tract · Mercer County
Census Tract 4, Mercer County, New Jersey
Census Tract 4, GEOID 34021000400, in Mercer County, New Jersey, entirely within Trenton. 6,392 residents in the ACS 2020-2024 5-year estimates (±1,319); the 2020 Census counted 6,305.
Residents, 2020-2024
6,392
±1,319 (90% margin)
2020 Census count: 6,305
Median household income
$49,023
±$12,547 (90% margin)
Mercer County: $100,645
Median home value
$120,800
±$49,364 (90% margin)
Mercer County: $377,700
Median gross rent
$1,604
±$155 (90% margin)
Mercer County: $1,623
Where is Census Tract 4?
Census Tract 4 is one of 84 census tracts in Mercer County, New Jersey. It covers 0.20 square miles of land, 31,368 residents per square mile in 2020. Its GEOID, 34021000400, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Trenton | 100% |
5 census tracts border Census Tract 4: Tract 2 ($87,632), Tract 3 ($61,147), Tract 5 ($52,679), Tract 7 ($61,318) and Tract 8 ($78,785). 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 4?
The 2020-2024 American Community Survey puts Census Tract 4's population at 6,392 (±1,319) in 1,876 households; the 2020 Census counted 6,305 residents and 1,942 housing units.
| Measure | Tract 4 | Trenton |
|---|---|---|
| Total population | 6,392 ±1,319 | 90,338 |
| Households | 1,876 ±315 | 32,052 |
| Average household size | 3.40 ±0.63 | 2.74 |
| Housing units | 1,977 ±316 | 34,513 |
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 4?
The median resident of Census Tract 4 is 35.3 years old. The largest group is Hispanic or Latino residents (of any race) at 70.7%, then non-Hispanic white residents at 16.2%. 52.3% of residents were born outside the United States.
| Measure | Tract 4 | Trenton |
|---|---|---|
| Median age | 35.3 ±9.8 | 34.8 |
| Under 18 years | 29.0% ±10.3 pts | 27.8% |
| 65 years and over | 8.4% ±5.9 pts | 12.0% |
| Hispanic or Latino (any race) | 70.7% ±14.8 pts | 46.4% |
| White alone, not Hispanic | 16.2% ±7.2 pts | 10.6% |
| Black or African American alone, not Hispanic | 7.0% ±7.6 pts | 40.0% |
| Asian alone, not Hispanic | 0.0% ±0.7 pts | 0.4% |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±0.7 pts | 0.0% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.7 pts | 0.0% |
| Two or more races, not Hispanic | 6.1% ±8.2 pts | 2.4% |
| Some other race alone, not Hispanic | 0.0% ±0.7 pts | 0.2% |
| Born outside the United States | 52.3% ±11.1 pts | 30.9% |
| Speak a language other than English at home (age 5+) | 69.5% ±12.3 pts | 45.9% |
| Civilian veterans (age 18+) | 0.0% ±1.0 pts | 4.3% |
| With a disability | 9.8% ±5.9 pts | 14.4% |
| No health insurance coverage | 28.1% ±8.6 pts | 17.6% |
| High school graduate or higher (age 25+) | 63.7% ±13.1 pts | 74.6% |
| Bachelor's degree or higher (age 25+) | 8.7% ±5.4 pts | 16.2% |
| Graduate or professional degree (age 25+) | 1.3% ±2.0 pts | 4.9% |
| Lived in the same house a year earlier | 86.8% ±7.7 pts | 88.0% |
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 4 earn?
Half of the 1,876 households in Census Tract 4 earn less than $49,023 a year (±$12,547), against $100,645 across Mercer County: 72nd highest of the county's 81 tracts with a reliable estimate. 29.0% of residents live below the poverty line.
| Measure | Tract 4 | Trenton |
|---|---|---|
| Median household income | $49,023 ±$12,547 | $52,537 |
| Mean household income | $70,530 ±$15,161 | $77,515 |
| Per capita income | $20,171 ±$4,181 | $28,236 |
| People below the poverty line | 29.0% ±13.9 pts | 21.6% |
| Children under 18 below the poverty line | 56.6% ±29.1 pts | 26.3% |
| Households receiving SNAP | 23.3% ±13.7 pts | 25.9% |
| Households with a computer | 92.7% ±9.8 pts | 90.4% |
| Households with a broadband subscription | 85.1% ±10.9 pts | 82.0% |
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 4?
Owners occupy 23.7% of Census Tract 4's occupied homes and renters 76.3%. The median owner-occupied home is valued at $120,800 by its owner (±$49,364). The median renter pays $1,604 a month including utilities, and 61.7% of renters pay 35% or more of their income on rent.
| Measure | Tract 4 | Trenton |
|---|---|---|
| Median home value (owner-occupied) | $120,800 ±$49,364 | $160,700 |
| Median gross rent | $1,604 ±$155 | $1,294 |
| Renters paying 35% or more of income on rent | 61.7% ±15.4 pts | 47.9% |
| Median monthly owner costs, with a mortgage | $1,471 ±$334 | $1,717 |
| Owner-occupied homes | 23.7% ±12.1 pts | 37.9% |
| Renter-occupied homes | 76.3% ±12.1 pts | 62.1% |
| Housing units | 1,977 ±316 | 34,513 |
| Single-family detached homes | 11.4% ±7.9 pts | 16.2% |
| Mobile homes | 0.0% ±2.2 pts | 0.2% |
| Built 2020 or later | 0.0% ±2.2 pts | 0.7% |
| Built 2010 to 2019 | 0.0% ±2.2 pts | 4.0% |
| Built 1939 or earlier | 63.5% ±14.1 pts | 38.1% |
| Households with no vehicle | 30.9% ±13.9 pts | 26.7% |
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 4 get to work?
49.4% of Census Tract 4's workers drive alone. The average trip to work takes 31.7 minutes.
| Measure | Tract 4 | Trenton |
|---|---|---|
| In the labor force (age 16+) | 74.1% ±12.3 pts | 61.4% |
| Unemployment rate | 3.7% ±3.5 pts | 10.1% |
| Drove alone to work | 49.4% ±15.5 pts | 57.7% |
| Carpooled | 19.9% ±10.9 pts | 15.8% |
| Public transportation | 4.0% ±4.3 pts | 6.6% |
| Walked | 7.7% ±6.9 pts | 3.9% |
| Worked from home | 0.0% ±0.2 pts | 7.1% |
| Mean travel time to work | 31.7 min ±8.5 | 26.9 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 4 compare with the other tracts in Mercer County?
Among Mercer County's tracts with a reliable estimate, Census Tract 4 ranks as shown below (1 = highest).
| Measure | In Mercer County | In Trenton |
|---|---|---|
| Population | 14th of 84 | 1st of 25 |
| Residents per square mile | 3rd of 84 | 3rd of 25 |
| Median household income | 72nd of 81 | 14th of 23 |
| Per capita income | 78th of 83 | 19th of 24 |
| Median home value | 71st of 76 | 12th of 17 |
| Median gross rent | 46th of 76 | 6th of 22 |
| Poverty rate | 6th of 47 | 6th of 18 |
| Bachelor's degree or higher | 79th of 79 | 20th of 20 |
| Median age | 66th of 84 | 14th of 25 |
| Owner-occupied share | 78th of 81 | 19th of 22 |
The tracts next to it on Mercer County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 18 | 69th | $57,734±$13,122 · within the margin of this tract |
| Tract 12 | 70th | $53,100±$24,952 · within the margin of this tract |
| Tract 5 | 71st | $52,679±$22,338 · within the margin of this tract |
| Tract 4 | 72nd | $49,023±$12,547 |
| Tract 19 | 73rd | $48,182±$24,549 · within the margin of this tract |
| Tract 1 | 74th | $43,497±$19,687 · within the margin of this tract |
| Tract 20 | 75th | $39,734±$13,301 · within the margin of this tract |
"Within the margin": the two incomes differ by less than their combined 90% margins, so the survey cannot say which is higher and the ranks between them are not firm.
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 4?
3 of the 18 figures for Census Tract 4 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