Northfield, NJ demographics:
population, income, and more

Total population
8,456
0.3% year-over-year change
Median household income
$111,599/yr
7.3% year-over-year change
Housing units
3,408
-1.1% year-over-year change

Northfield population

How many people live in Northfield

Northfield is home to 8,456 residents, according to the most recent Census data. Gender-wise, 49.1% of Northfield locals are male, and 50.9% are female.

Total population
8,456
0.3% year-over-year change
Gender ratio
Male
49.1%
4,151
Female
50.9%
4,305
Value Percent YoY change
Male 4,151 49.1% -3.1%
Female 4,305 50.9% 4.0%
A higher population often means more rental variety and livelier areas. The gender balance—how many men live here compared to women—can reveal a lot about the community and the lifestyles of its residents. Use this info to get a sense of the area's pace and personality.

Age demographics

The median age in Northfield is 44, with the population distributed as follows: about 15% are children under 15, then 12.1% are in the 15 to 24 age group. Adults between 25 and 44 make up 23.8% of the population, while another 29.6% fall into the 45 to 64 bracket. Finally, around 19.5% are 65 or older.

Median age
43.7
Age breakdown
Under 15
15%
15 to 24
12.1%
25 to 44
23.8%
45 to 64
29.6%
Over 65
19.5%
Value Percent YoY change
Under 15 1,272 15% 9.6%
15 to 24 1,020 12.1% -6.0%
25 to 44 2,012 23.8% -0.3%
45 to 64 2,504 29.6% -0.2%
Over 65 1,648 19.5% -0.4%
The age composition helps you get insight into who lives in the area. A younger population might mean a more active, fast-paced vibe, while an older one could suggest a quieter, slower lifestyle. If there's a balanced makeup, you’re likely to find a variety of services, housing types, and community spaces that cater to different life stages.

Racial makeup

In Northfield, 86.8% of the population are US-born citizens, while 11% have gained naturalized citizenship. At the same time, 2.2% of residents are non-citizens. As for race, 78.8% of locals are Caucasian, 2.1% are African American and 9% have Asian roots. There’s also a share of 8% that includes residents with two or more races.

Citizenship
U.S.-born citizens
86.8%
Non-U.S.-born citizens
11%
Non-citizens
2.2%
Value Percent YoY change
U.S.-born citizens 7,341 86.8% 3.0%
Non-U.S.-born citizens 932 11% -11.3%
Non-citizens 183 2.2% -26.5%
Racial breakdown
White
78.8%
Black or African American
2.1%
American Indian and Alaska Native
0%
Asian
9%
Native Hawaiian and other Pacific Islander
0%
Two or more races
8%
Other
2.1%
Value Percent
White 6,659 78.8%
Black or African American 180 2.1%
Asian 758 9%
Two or more races 681 8%
Other 178 2.1%

Households in Northfield

A peek inside Northfield households

Northfield has 3,257 households, with an average of 3 members in each. Of these, 70.9% are families, while the remaining 29.1% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
3,257
-1.3% year-over-year change
Average people per household
3
Non-family households
948
Family households
2,309
Value Percent YoY change
Non-family households 948 29.1% -3.3%
Family households 2,309 70.9% -0.4%
The mix between family and non-family households gives a glimpse into daily life. A higher percentage of families might mean more parks and schools, while more non-family setups can mean flexible housing and diverse living styles. For renters, this can signal what kinds of homes are common and can help you figure out if the area matches your lifestyle.

Housing in Northfield

The housing landscape of Northfield

Northfield's housing consists of 3,408 units, with 88.7% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 1.8% and offer a more compact, shared living style.

Housing units
3,408
-1.1% year-over-year change
Housing types
Value Percent
1 unit, detached 3,022 88.7%
1 unit, attached 62 1.8%
2 units 39 1.1%
10 to 19 units 50 1.5%
20 to 49 units 235 6.9%
Homes built since 2020
6
-33.3% year-over-year change

The age of buildings in Northfield

In Northfield, the median construction year is 1965. About 14.3% of homes were built before the 1940s, with another 3.8% going up by 1949. Most development happened in the second half of the 20th century. Then, 9.8% of homes were added from 2000 to 2009, 3.2% between 2010 and 2019, and 0.2% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 488 14.3% 2.5%
Built between 1940 and 1949 131 3.8% -13.8%
Built between 1950 and 1959 646 19% -4.6%
Built between 1960 and 1969 806 23.6% 7.5%
Built between 1970 and 1979 263 7.7% -17.6%
Built between 1980 and 1989 418 12.3% 7.2%
Built between 1990 and 1999 207 6.1% -31.2%
Built between 2000 and 2009 333 9.8% 30.6%
Built between 2010 and 2019 110 3.2% -6.8%
Built in 2020 or later 6 0.2% -33.3%
As a renter, knowing when homes were built helps you understand the potential condition and design of rental units. Newer builds may have more contemporary layouts, while older homes can offer character or larger lots, depending on the area.

Northfield occupancy rates

Out of the 3,257 occupied housing units in Northfield, 88.3% are owner-occupied, while 11.7% are lived in by tenants. Meanwhile, 4.4% of all homes on the local market sit vacant.

Occupied housing units
3,257
-1.3% year-over-year change
Occupancy breakdown
Renter occupied
381
Owner occupied
2,876
Value Percent YoY
change
Renter occupied 381 11.7% -5.2%
Owner occupied 2,876 88.3% -0.7%
Unoccupied housing units
4.4%
Unoccupied housing units refer to homes that are currently without residents—whether they're waiting for renters or owners, used seasonally, or simply unclaimed. A higher share of empty homes may mean more housing availability, while a low number can reflect a tighter market with more competition. This, along with the renter-vs.-owner mix, helps paint a clearer picture of what types of housing and services are likely to be available in the area.

Northfield housing costs

Housing costs in Northfield come to a median of $1,893 per month, while tenants specifically pay a median gross rent of $1,835.

Median housing costs per month
$1,893/month
This figure sums up typical monthly housing costs for all households in the area. If you own, it includes mortgage payments in addition to property taxes, insurance and HOA fees. If you rent, it accounts for rent plus extras like utilities. It’s useful for seeing how local living expenses stack up compared to other places.
Median gross rent in Northfield
$1,835/month
Gross rent gives a more complete look at what renters actually pay, including not just base rent, but also utilities and fees. It’s a key number for evaluating rental affordability in your area of interest and understanding how it compares to nearby locations.

Education in Northfield

Northfield education at a glance

About 28.2% of the population in Northfield went to high school, while 16.8% pursued college studies. Another 7.8% earned an associate degree and 28.6% hold a bachelor’s. Meanwhile, 15.9% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 181 2.6% -15.0%
High school diploma 1,938 28.2% 6.8%
College diploma 1,151 16.8% -3.3%
Associate degree 537 7.8% -21.4%
Bachelor's degree 1,963 28.6% 2.5%
Graduate degree 1,092 15.9% -0.3%
A community’s education mix can offer insights into the local economy and housing market. Higher levels of education often align with more job opportunities and stable incomes, which can increase demand for homes and influence both rent prices and rental availability.

Income in Northfield

How much people earn in Northfield

The average annual household income in Northfield was $152,066 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a +5.5% change from the previous year. At the same time, the median income stood at $111,599, reflecting a +7.3% shift over the same period.

Average household income in Northfield
$152,066/year
5.5% year-over-year change
Median household income in Northfield
$111,599/year
7.3% year-over-year change

Northfield income by age

In Northfield, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $132,929. Those with someone between 45 and 64 in charge, often well established professionally, earn $152,083 overall. Overall, 95.4% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
25 - 44 $132,929 3.5%
45 - 64 $152,083 11.5%
Over 65 $75,357 10.2%
Above poverty level
7,883
Below poverty level
382
Value Percent YoY
change
Above poverty level 7,883 95.4% 0.1%
Below poverty level 382 4.6% 5.0%

Employment in Northfield

Workforce and job types in Northfield

The job market in Northfield is powered by 4,497 working residents, spread across a range of industries and roles. 88.7% of the working population are employed in professional or administrative positions, while 11.3% are in hands-on or service-based jobs. Also, 6.3% run their own businesses, 62.1% are employed by private companies, and 23.8% work in the public sector.

Workforce demographics

Working population
4,497
-1.1% year-over-year change
White collar
3,990
Blue collar
507
Value Percent YoY change
White collar 3,990 88.7% -1.0%
Blue collar 507 11.3% -2.5%
Employer type
Self employees
6.3%
Private companies
62.1%
Governmental workers
23.8%
Not for profit companies
7.9%
Value Percent YoY change
Self employees 283 6.3% -12.9%
Private companies 2,791 62.1% -5.2%
Governmental workers 1,068 23.8% 7.5%
Not for profit companies 355 7.9% 24.1%
Unemployment rate
3.9%
38.9% year-over-year change

Available workforce

The unemployment rate in Northfield stands at 3.9%, representing the share of the workforce currently without a job and actively looking for one.

For renters, the unemployment rate helps paint a picture of job security and financial stability in the area. Rates around 4% to 5% are considered typical. A lower-than-average rate might suggest strong job prospects and a thriving local economy, while a higher rate could hint at fewer opportunities—both useful to consider when planning a move.

Transportation in Northfield

How people get around in Northfield

Commuting methods vary: 83.8% of residents travel by personal vehicle and 0.5% prefer to walk, while the remaining share relies on public transit or on two wheelers to get from A to B.

Means of transportation
Value Percent YoY change
Car 3,706 83.8% -2.7%
Taxicab 11 0.2% 120.0%
Bus or trolleybus 31 0.7% -18.4%
Ferryboat 15 0.3% -16.7%
Bicycle 7 0.2% -79.4%
Walk 21 0.5% -47.5%
Understanding how locals get to work can help you plan your own routine. High car usage might mean you’ll need a vehicle, while strong public transit or walkability could save you the hassle. Commute times also play a big role in quality of life—shorter trips can give you more time for the things you enjoy.

What is the median and average household income in Northfield by zipcode?

Zipcode Population Number of households Median income Average income
08225 8,456 3,257 $111,599 $152,066

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FAQs about Northfield demographics 

What is the total population of Northfield?

Northfield has a total population of 8,456 residents, according to the latest release from the U.S. Census Bureau: the 2019-2023 American Community Survey (ACS) 5-year estimates. This figure changed by +0.3% compared to a year ago.

What is the gender ratio in Northfield?

The gender ratio in Northfield is as follows:
  • 49.1% males (4,151 residents)
  • 50.9% females (4,305 residents)

What is the median age in Northfield?

The median age in Northfield is 43.7.

What is the age distribution of the population in Northfield?

The age distribution in Northfield is as follows:
  • Under 15: 15% (1,272 residents)
  • Ages 15-24: 12.1% (1,020 residents)
  • Ages 25-44: 23.8% (2,012 residents)
  • Ages 45-64: 29.6% (2,504 residents)
  • Over 65: 19.5% (1,648 residents)

What is the racial and ethnic makeup of Northfield?

The racial and ethnic makeup of Northfield is as follows:
  • White: 78.8% (6,659 residents)
  • Black or African American: 2.1% (180 residents)
  • American Indian and Alaska Native: 0% (0 residents)
  • Asian: 9% (758 residents)
  • Native Hawaiian and Other Pacific Islander: 0% (0 residents)
  • Two or More Races: 8% (681 residents)
  • Other: 2.1% (178 residents)

What percentage of the population in Northfield are U.S.-born citizens?

U.S.-born citizens represent 86.8% of the population in Northfield.

How many housing units are there in Northfield?

There are 3,408 housing units in Northfield, reflecting a -1.1% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in Northfield and what is the average household size?

Northfield has a total of 3,257 households, with an average of 3 people in each.

What is the median household income in Northfield?

Northfield has a median household income of $111,599, representing a +7.3% shift from the previous year, according to the U.S. Census Bureau.

What is the employment rate and job market overview for Northfield?

The employment rate is 96.1% in Northfield, with a workforce of 4,497 residents. Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 88.7% (3,990 residents)
  • Blue-collar workers: 11.3% (507 residents)

Places of employment:
  • Self-employed: 6.3% (283 residents)
  • Private companies: 62.1% (2,791 residents)
  • Governmental workers: 23.8% (1,068 residents)
  • Not-for-profit companies: 7.9% (355 residents)

Data source & methodology

The demographic data on this page was sourced from the latest U.S. Census Bureau release—the 2019–2023 American Community Survey (ACS) 5-year estimates.

The information, issued annually, is compiled and published by the Point2Homes Research Team as soon as new data becomes available.

No representation, guarantee, or warranty is made concerning the accuracy or completeness of modified or aggregated information for particular areas.

Page last updated: September 2025