Williamstown, New Jersey Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of Williamstown, New Jersey is 14,855 as of the 2023 American Community Survey, making it the 82nd-largest city in New Jersey. The median household income is $87,021, the median home value is $255,000, and the median age is 40.6.
14,855
Population
2002
People / sq mi
$87,021
Median Income
$255,000
Median Home Value
Williamstown covers 7.4 sq mi of land at 2002 people per square mile.
About Williamstown, NJ
Williamstown is a city in New Jersey with a population of 14,855. It ranks #82 among cities in New Jersey by population. The median age is 40.6, older than the national median. The population is 46.0% male and 54.0% female.
The median household income in Williamstown is $87,021, above the US median of $74,580. 3.0% of residents live below the federal poverty level. Home values sit at a median of $255,000, with monthly rent averaging $1,262. The homeownership rate of 79.6% is higher than the national rate of 64.8%.
Educational attainment in Williamstown reflects 27.5% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 8.8% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 35.0 minutes each way.
Race & Ethnicity
| White | 77.8% |
| Black or African American | 9.6% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 4.4% |
| Two or More Races | 0.0% |
Economy & Income
$87,021
Median Household Income
$42,041
Per Capita Income
3.0%
Poverty Rate
3.8%
Unemployment Rate
Housing
$255,000
Median Home Value
$1,262
Median Rent
79.6%
Owner-Occupied
Education
96.5%
High School+
27.5%
Bachelor's+
Commute
1.9%
Drive Alone
81.0%
Public Transit
8.8%
Work From Home
35.0 min
Avg Commute
Community Profile
29.0%
Foreign Born
94.9%
Non-English at Home
7.3%
Veterans
13.4%
With Disability
91.9%
Health Insurance
96.2%
Internet Access
Employment by Industry
| Professional, Scientific & Management | 21.9% |
| Retail Trade | 12.0% |
| Public Administration | 10.1% |
| Finance, Insurance & Real Estate | 9.0% |
| Construction | 7.4% |
| Manufacturing | 6.7% |
| Information | 5.3% |
| Education, Health Care & Social Services | 5.1% |
| Arts, Entertainment & Food Services | 3.8% |
| Agriculture & Mining | 0.8% |
| Transportation & Warehousing | 0.7% |
Largest cities in New Jersey
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Part of New Jersey
Metro areas in New Jersey
City rankings
Frequently Asked Questions
Williamstown, New Jersey has a population of 14,855 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 82nd-largest city in New Jersey.
The median household income in Williamstown, New Jersey is $87,021, with 3.0% of residents living below the federal poverty level.
The median home value in Williamstown, New Jersey is $255,000, with median monthly rent at $1,262 and a homeownership rate of 79.6%.
The median age in Williamstown, New Jersey is 40.6 years. The population is 46.0% male and 54.0% female.
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Statewide data for New Jersey
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.