Census tract · Warren County
Census Tract 311.02, Warren County, New Jersey
Census Tract 311.02, GEOID 34041031102, in Warren County, New Jersey, mostly within Frelinghuysen Township (64% of its census blocks). 3,556 residents in the ACS 2020-2024 5-year estimates (±223); the 2020 Census counted 3,786.
Residents, 2020-2024
3,556
±223 (90% margin)
2020 Census count: 3,786
Median household income
$122,986
±$4,745 (90% margin)
Warren County: $100,869
Median home value
$439,500
±$18,931 (90% margin)
Warren County: $346,500
Median gross rent
$1,776
±$113 (90% margin)
Warren County: $1,409
Where is Census Tract 311.02?
Census Tract 311.02 is one of 23 census tracts in Warren County, New Jersey. It covers 40.43 square miles of land, 94 residents per square mile in 2020. Its GEOID, 34041031102, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Frelinghuysen Township | 64% |
| Hardwick Township | 36% |
| Johnsonburg | 9% |
| Marksboro | 7% |
8 census tracts border Census Tract 311.02: Tract 3719 in Sussex County ($103,906), Tract 3739 in Sussex County ($123,134), Tract 3740 in Sussex County ($142,903), Tract 3741 in Sussex County ($141,875), Tract 311.01 ($124,359), Tract 312 ($106,791), Tract 313.01 ($92,243) and Tract 313.02 ($131,626). 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 311.02?
The 2020-2024 American Community Survey puts Census Tract 311.02's population at 3,556 (±223) in 1,351 households; the 2020 Census counted 3,786 residents and 1,439 housing units.
| Measure | Tract 311.02 | Frelinghuysen Township |
|---|---|---|
| Total population | 3,556 ±223 | 2,137 |
| Households | 1,351 ±88 | 836 |
| Average household size | 2.49 ±0.12 | 2.41 |
| Housing units | 1,423 ±91 | 877 |
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 311.02?
The median resident of Census Tract 311.02 is 49.5 years old; 18.2% are under 18 and 25.2% are 65 or older. The largest group is non-Hispanic white residents at 87.5%, then Hispanic or Latino residents (of any race) at 7.1%. 6.1% of residents were born outside the United States.
| Measure | Tract 311.02 | Frelinghuysen Township |
|---|---|---|
| Median age | 49.5 ±3.1 | 51.5 |
| Under 18 years | 18.2% ±2.1 pts | 16.0% |
| 65 years and over | 25.2% ±2.4 pts | 25.8% |
| Hispanic or Latino (any race) | 7.1% ±2.8 pts | 6.5% |
| White alone, not Hispanic | 87.5% ±3.1 pts | 88.1% |
| Black or African American alone, not Hispanic | 2.7% ±1.8 pts | 1.8% |
| Asian alone, not Hispanic | 1.0% ±0.9 pts | 0.8% |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±1.3 pts | 0.0% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±1.3 pts | 0.0% |
| Two or more races, not Hispanic | 1.7% ±1.0 pts | 2.8% |
| Some other race alone, not Hispanic | 0.0% ±1.3 pts | 0.0% |
| Born outside the United States | 6.1% ±1.9 pts | 4.2% |
| Speak a language other than English at home (age 5+) | 11.0% ±2.9 pts | 7.2% |
| Civilian veterans (age 18+) | 4.9% ±1.4 pts | 3.9% |
| With a disability | 13.7% ±2.4 pts | 13.9% |
| No health insurance coverage | 2.8% ±1.4 pts | 0.8% |
| High school graduate or higher (age 25+) | 95.3% ±1.9 pts | 96.7% |
| Bachelor's degree or higher (age 25+) | 46.3% ±5.2 pts | 51.8% |
| Graduate or professional degree (age 25+) | 13.8% ±2.5 pts | 15.8% |
| Lived in the same house a year earlier | 92.8% ±2.8 pts | 95.0% |
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 311.02 earn?
Half of the 1,351 households in Census Tract 311.02 earn less than $122,986 a year (±$4,745), against $100,869 across Warren County: 6th highest of the county's 22 tracts with a reliable estimate. 4.4% of residents live below the poverty line.
| Measure | Tract 311.02 | Frelinghuysen Township |
|---|---|---|
| Median household income | $122,986 ±$4,745 | $122,727 |
| Mean household income | $146,991 ±$11,140 | $149,718 |
| Per capita income | $56,516 ±$4,591 | $59,305 |
| People below the poverty line | 4.4% ±2.2 pts | 3.8% |
| Children under 18 below the poverty line | 0.0% ±7.0 pts | 0.0% |
| Households receiving SNAP | 1.9% ±1.4 pts | 3.1% |
| Households with a computer | 96.0% ±2.1 pts | 97.0% |
| Households with a broadband subscription | 94.1% ±2.7 pts | 93.2% |
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 311.02?
Owners occupy 91.3% of Census Tract 311.02's occupied homes and renters 8.7%. The median owner-occupied home is valued at $439,500 by its owner (±$18,931). The median renter pays $1,776 a month including utilities.
| Measure | Tract 311.02 | Frelinghuysen Township |
|---|---|---|
| Median home value (owner-occupied) | $439,500 ±$18,931 | $455,500 |
| Median gross rent | $1,776 ±$113 | $1,683 |
| Renters paying 35% or more of income on rent | 37.3% ±27.3 pts | 24.0% |
| Median monthly owner costs, with a mortgage | $2,617 ±$193 | $2,648 |
| Owner-occupied homes | 91.3% ±2.4 pts | 93.4% |
| Renter-occupied homes | 8.7% ±2.4 pts | 6.6% |
| Housing units | 1,423 ±91 | 877 |
| Single-family detached homes | 98.3% ±1.1 pts | 98.5% |
| Mobile homes | 0.3% ±0.4 pts | 0.5% |
| Built 2020 or later | 0.5% ±0.4 pts | 0.0% |
| Built 2010 to 2019 | 2.0% ±1.2 pts | 3.1% |
| Built 1939 or earlier | 15.4% ±3.3 pts | 19.2% |
| Households with no vehicle | 2.4% ±1.3 pts | 2.3% |
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 311.02 get to work?
74.2% of Census Tract 311.02's workers drive alone and 16.4% work from home. The average trip to work takes 33.7 minutes. The unemployment rate in 2020-2024 averaged 7.2%.
| Measure | Tract 311.02 | Frelinghuysen Township |
|---|---|---|
| In the labor force (age 16+) | 59.9% ±2.8 pts | 58.5% |
| Unemployment rate | 7.2% ±2.9 pts | 6.8% |
| Drove alone to work | 74.2% ±4.6 pts | 78.8% |
| Carpooled | 5.3% ±2.3 pts | 2.5% |
| Public transportation | 0.2% ±0.3 pts | 0.3% |
| Walked | 2.2% ±1.7 pts | 1.9% |
| Worked from home | 16.4% ±4.3 pts | 15.3% |
| Mean travel time to work | 33.7 min ±2.9 | 33.2 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 311.02 compare with the other tracts in Warren County?
Among Warren County's tracts with a reliable estimate, Census Tract 311.02 ranks as shown below (1 = highest).
| Measure | In Warren County |
|---|---|
| Population | 15th of 23 |
| Residents per square mile | 23rd of 23 |
| Median household income | 6th of 22 |
| Per capita income | 4th of 23 |
| Median home value | 2nd of 23 |
| Median gross rent | 5th of 23 |
| Poverty rate | 16th of 17 |
| Bachelor's degree or higher | 4th of 23 |
| Median age | 6th of 23 |
| Owner-occupied share | 4th of 23 |
The tracts next to it on Warren County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 321.01 | 3rd | $132,697±$14,409 · within the margin of this tract |
| Tract 313.02 | 4th | $131,626±$9,568 · within the margin of this tract |
| Tract 311.01 | 5th | $124,359±$17,573 · within the margin of this tract |
| Tract 311.02 | 6th | $122,986±$4,745 |
| Tract 314.02 | 7th | $107,877±$5,339 |
| Tract 312 | 8th | $106,791±$6,457 |
| Tract 323 | 9th | $103,611±$23,206 · 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 311.02?
2 of the 18 figures for Census Tract 311.02 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