Hamilton, Mercer County, NJ demographics:
population, income, and more

Total population
65,833
1.7% year-over-year change
Median household income
$83,906/yr
-3.7% year-over-year change
Housing units
24,975
0.2% year-over-year change

Hamilton population

How many people live in Hamilton

Hamilton is home to 65,833 residents, according to the most recent Census data. Gender-wise, 50.9% of Hamilton locals are male, and 49.1% are female.

Total population
65,833
1.7% year-over-year change
Gender ratio
Male
50.9%
33,486
Female
49.1%
32,346
Value Percent YoY change
Male 33,486 50.9% 2.1%
Female 32,346 49.1% 1.3%
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 Hamilton is 39, with the population distributed as follows: about 19.2% are children under 15, then 11.8% are in the 15 to 24 age group. Adults between 25 and 44 make up 27.9% of the population, while another 26% fall into the 45 to 64 bracket. Finally, around 15% are 65 or older.

Median age
38.9
Age breakdown
Under 15
19.2%
15 to 24
11.8%
25 to 44
27.9%
45 to 64
26%
Over 65
15%
Value Percent YoY change
Under 15 12,656 19.2% 2.6%
15 to 24 7,762 11.8% 8.2%
25 to 44 18,393 27.9% -0.3%
45 to 64 17,116 26% 0.9%
Over 65 9,905 15% 1.2%
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 Hamilton, 68.1% of the population are US-born citizens, while 15.4% have gained naturalized citizenship. At the same time, 16.5% of residents are non-citizens. As for race, 43.5% of locals are Caucasian, 17% are African American and 3.7% have Asian roots. There’s also a share of 13.2% that includes residents with two or more races.

Citizenship
U.S.-born citizens
68.1%
Non-U.S.-born citizens
15.4%
Non-citizens
16.5%
Value Percent YoY change
U.S.-born citizens 44,844 68.1% -1.3%
Non-U.S.-born citizens 10,151 15.4% 3.1%
Non-citizens 10,838 16.5% 15.1%
Racial breakdown
White
43.5%
Black or African American
17%
American Indian and Alaska Native
2.6%
Asian
3.7%
Native Hawaiian and other Pacific Islander
0%
Two or more races
13.2%
Other
20.1%
Value Percent
White 28,634 43.5%
Black or African American 11,200 17%
American Indian and Alaska Native 1,686 2.6%
Asian 2,424 3.7%
Native Hawaiian and other Pacific Islander 15 0%
Two or more races 8,662 13.2%
Other 13,213 20.1%

Households in Hamilton

A peek inside Hamilton households

Hamilton has 24,265 households, with an average of 3 members in each. Of these, 66.8% are families, while the remaining 33.2% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
24,265
2.0% year-over-year change
Average people per household
3
Non-family households
8,059
Family households
16,205
Value Percent YoY change
Non-family households 8,059 33.2% 2.3%
Family households 16,205 66.8% 1.9%
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 Hamilton

The housing landscape of Hamilton

Hamilton's housing consists of 24,975 units, with 48.3% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 22.1% and offer a more compact, shared living style. Then there are the multifamily buildings in the area, and for those seeking flexibility, non-traditional options like mobile homes account for 0.5% of the housing landscape.

Housing units
24,975
0.2% year-over-year change
Housing types
Value Percent
1 unit, detached 12,068 48.3%
1 unit, attached 5,511 22.1%
2 units 1,730 6.9%
3 or 4 units 1,328 5.3%
5 to 9 units 667 2.7%
10 to 19 units 1,452 5.8%
20 to 49 units 695 2.8%
50 or more units 1,371 5.5%
Mobile home 136 0.5%
Boat, RV, van, etc. 18 0.1%
Homes built since 2020
86
14.7% year-over-year change

The age of buildings in Hamilton

In Hamilton, the median construction year is 1959. About 23.5% of homes were built before the 1940s, with another 7.6% going up by 1949. Most development happened in the second half of the 20th century. Then, 4.9% of homes were added from 2000 to 2009, 2.4% between 2010 and 2019, and 0.3% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 5,870 23.5% -5.7%
Built between 1940 and 1949 1,911 7.6% -15.5%
Built between 1950 and 1959 5,175 20.7% -2.6%
Built between 1960 and 1969 3,539 14.2% 5.4%
Built between 1970 and 1979 3,099 12.4% 6.6%
Built between 1980 and 1989 2,270 9.1% 7.4%
Built between 1990 and 1999 1,189 4.8% 3.2%
Built between 2000 and 2009 1,226 4.9% 32.8%
Built between 2010 and 2019 610 2.4% 0.7%
Built in 2020 or later 86 0.3% 14.7%
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.

Hamilton occupancy rates

Out of the 24,265 occupied housing units in Hamilton, 61.7% are owner-occupied, while 38.3% are lived in by tenants. Meanwhile, 2.8% of all homes on the local market sit vacant.

Occupied housing units
24,265
2.0% year-over-year change
Occupancy breakdown
Renter occupied
9,288
Owner occupied
14,977
Value Percent YoY
change
Renter occupied 9,288 38.3% 3.3%
Owner occupied 14,977 61.7% 1.3%
Unoccupied housing units
2.8%
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.

Hamilton housing costs

Housing costs in Hamilton come to a median of $1,549 per month, while tenants specifically pay a median gross rent of $1,578.

Median housing costs per month
$1,549/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 Hamilton
$1,578/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 Hamilton

Hamilton education at a glance

About 40.2% of the population in Hamilton went to high school, while 17.9% pursued college studies. Another 7.1% earned an associate degree and 19% hold a bachelor’s. Meanwhile, 8.2% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 3,873 7.7% 13.0%
High school diploma 20,289 40.2% 2.7%
College diploma 9,038 17.9% -1.2%
Associate degree 3,571 7.1% -4.3%
Bachelor's degree 9,567 19% -1.0%
Graduate degree 4,140 8.2% -1.6%
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 Hamilton

How much people earn in Hamilton

The average annual household income in Hamilton was $121,928 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a +2% change from the previous year. At the same time, the median income stood at $83,906, reflecting a -3.7% shift over the same period.

Average household income in Hamilton
$121,928/year
2.0% year-over-year change
Median household income in Hamilton
$83,906/year
-3.7% year-over-year change

Hamilton income by age

In Hamilton, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $99,794. Those with someone between 45 and 64 in charge, often well established professionally, earn $92,551 overall. Younger households, where the main provider is under 25 and just starting out, report a median income of $100,822, while those led by someone over 65, many of whom may be retired, have about $63,518 in earnings. Overall, 89.1% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
Under 25 $100,822 146.4%
25 - 44 $99,794 1.0%
45 - 64 $92,551 -0.1%
Over 65 $63,518 -0.9%
Above poverty level
56,836
Below poverty level
6,974
Value Percent YoY
change
Above poverty level 56,836 89.1% 1.8%
Below poverty level 6,974 10.9% -0.9%

Employment in Hamilton

Workforce and job types in Hamilton

76.2% of the working population are employed in professional or administrative positions, while 23.8% are in hands-on or service-based jobs. Also, 7.1% run their own businesses, 67% are employed by private companies, and 17.8% work in the public sector.

Workforce demographics

White collar
24,751
Blue collar
7,713
Value Percent YoY change
White collar 24,751 76.2% 2.6%
Blue collar 7,713 23.8% 4.3%
Employer type
Self employees
7.1%
Private companies
67%
Governmental workers
17.8%
Not for profit companies
8%
Value Percent YoY change
Self employees 2,297 7.1% 5.7%
Private companies 21,762 67% 2.7%
Governmental workers 5,793 17.8% 4.1%
Not for profit companies 2,612 8% 1.2%

Transportation in Hamilton

How people get around in Hamilton

In Hamilton, the average commute time is 20 minutes. Commuting methods vary: 94.2% of residents travel by personal vehicle and 1.9% prefer to walk, while the remaining share relies on public transit or on two wheelers to get from A to B.

Commute time
20 min
17.6% year-over-year change
Means of transportation
Value Percent YoY change
Car 25,584 94.2% -0.2%
Taxicab 309 1.1% 13.6%
Bus or trolleybus 371 1.4% -12.3%
Railroad 360 1.3% -29.3%
Bicycle 12 0% -7.7%
Walk 528 1.9% -9.4%
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 Hamilton by zipcode?

Zipcode Population Number of households Median income Average income
08609 15,938 4,880 $68,238 $122,026
08610 33,465 12,315 $83,906 $105,742
08611 31,995 10,716 $56,788 $73,082
08619 24,089 9,924 $105,946 $126,045
08629 13,013 4,296 $82,646 $94,502
08690 18,841 7,731 $127,339 $143,621
08691 16,607 6,859 $132,520 $165,069

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FAQs about Hamilton demographics 

What is the total population of Hamilton?

Hamilton has a total population of 65,833 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 +1.7% compared to a year ago.

What is the gender ratio in Hamilton?

The gender ratio in Hamilton is as follows:
  • 50.9% males (33,486 residents)
  • 49.1% females (32,346 residents)

What is the median age in Hamilton?

The median age in Hamilton is 38.9.

What is the age distribution of the population in Hamilton?

The age distribution in Hamilton is as follows:
  • Under 15: 19.2% (12,656 residents)
  • Ages 15-24: 11.8% (7,762 residents)
  • Ages 25-44: 27.9% (18,393 residents)
  • Ages 45-64: 26% (17,116 residents)
  • Over 65: 15% (9,905 residents)

What is the racial and ethnic makeup of Hamilton?

The racial and ethnic makeup of Hamilton is as follows:
  • White: 43.5% (28,634 residents)
  • Black or African American: 17% (11,200 residents)
  • American Indian and Alaska Native: 2.6% (1,686 residents)
  • Asian: 3.7% (2,424 residents)
  • Native Hawaiian and Other Pacific Islander: 0% (15 residents)
  • Two or More Races: 13.2% (8,662 residents)
  • Other: 20.1% (13,213 residents)

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

U.S.-born citizens represent 68.1% of the population in Hamilton.

How many housing units are there in Hamilton?

There are 24,975 housing units in Hamilton, reflecting a +0.2% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

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

Hamilton has a total of 24,265 households, with an average of 3 people in each.

What is the median household income in Hamilton?

Hamilton has a median household income of $83,906, representing a -3.7% shift from the previous year, according to the U.S. Census Bureau.

What is the job market overview for Hamilton?

Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 76.2% (24,751 residents)
  • Blue-collar workers: 23.8% (7,713 residents)

Places of employment:
  • Self-employed: 7.1% (2,297 residents)
  • Private companies: 67% (21,762 residents)
  • Governmental workers: 17.8% (5,793 residents)
  • Not-for-profit companies: 8% (2,612 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