Williamstown, New Jersey Demographics & Population 2026
During the 2020–2024 ACS period, Williamstown, New Jersey had a total population of 14,705, the 87th largest community in New Jersey, with a median household income of $89,414, which is 14% lower than the state average. The poverty rate is 8.3%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Williamstown Quick Facts
How Williamstown Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 14,855 | 14,705 | -1.0% |
| Median household income | $87,021 | $89,414 | +2.7% |
| Median home value | $255,000 | $278,600 | +9.3% |
How Williamstown Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
A less diverse community where one racial or ethnic group represents a large majority.
State average: 66 | National average: 61
Education
Educational Attainment (Adults 25+)
Williamstown Rankings in New Jersey
Explore New Jersey Rankings
Other Cities in Gloucester County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Glassboro | 23,717 | $87,278 | 13.4% | $314,400 |
| Woodbury | 10,042 | $77,028 | 13.2% | $222,700 |
| Clayton | 8,921 | $90,274 | 8.0% | $252,300 |
| Pitman | 8,856 | $98,489 | 3.1% | $279,300 |
| Paulsboro | 6,248 | $64,239 | 15.2% | $202,700 |
| Beckett | 5,017 | $115,363 | 8.7% | $313,400 |
| Mullica Hill | 4,591 | $131,250 | 7.2% | $442,800 |
| Oak Valley | 4,413 | $93,472 | 16.2% | $242,600 |
| Westville | 4,310 | $70,639 | 15.4% | $196,000 |
| Gibbstown | 3,685 | $91,250 | 6.9% | $249,100 |
Cities Similar to Williamstown
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Collingswood | 14,205 | $90,184 | $380,400 | 53.9% | 9.5% |
| Hammonton | 14,840 | $78,087 | $349,800 | 33.8% | 9.6% |
| Middlesex | 14,645 | $105,000 | $446,400 | 36.9% | 11.3% |
| Cherry Hill Mall | 14,541 | $103,708 | $341,200 | 47.7% | 10.8% |
| Eatontown | 13,575 | $90,463 | $492,400 | 37.9% | 4.4% |
Population Overview
Williamstown is a small city located in New Jersey, within Gloucester County. The total population is 14,705. It ranks as the 87th most populous out of 700 Census-designated places in New Jersey.
Age Demographics
The median age in Williamstown is 42.7 years. This is 6% higher than the state median of 40.1 years.
Economy, Income & Housing
The median household income in Williamstown is $89,414. This is 14% lower than the state median of $103,556. It is also 11% higher than the national median of $80,734. The poverty rate stands at 8.3%. This is 15% lower than the state poverty rate of 9.7%. The unemployment rate is 5.6%. This is 12% lower than the state rate of 6.3%. The median home value is $278,600. Housing costs are 39% lower than the state median of $454,400. The home-value-to-income ratio is 3.1x. 81.7% of occupied housing units are owner-occupied. This homeownership rate is 28% higher than the state average of 63.8%.
Race & Ethnicity
The largest racial or ethnic group in Williamstown is White (non-Hispanic), making up 76.8% of the population. Black or African American residents account for 10.4%. The White (non-Hispanic) population is significantly higher than the state average (76.8% vs 50.9%). The Hispanic or Latino population (5.5%) is well below the state average of 22.5%. The Asian population (1.1%) is well below the state average of 10.1%.
Education
29.6% of residents aged 25 and older hold a bachelor's degree or higher. This is 32% lower than the state rate of 43.6%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 95.2%.
Data Sources & Methodology
All demographic data for Williamstown, New Jersey is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against New Jersey state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 700 Census-designated places in New Jersey. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.
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Frequently Asked Questions
What is the population of Williamstown, New Jersey?
Williamstown, New Jersey has a population of 14,705 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Williamstown, NJ?
The median household income in Williamstown is $89,414, which is 11% higher than the national median of $80,734.
What is the poverty rate in Williamstown, NJ?
The poverty rate in Williamstown is 8.3%. This means approximately 1,200 residents live below the federal poverty line.
What is the racial makeup of Williamstown, New Jersey?
Williamstown's population is 76.8% White, 10.4% Black, 5.5% Hispanic/Latino, and 1.1% Asian.
What is the median home value in Williamstown, NJ?
The median home value in Williamstown is $278,600. The home-value-to-income ratio is 3.1x.
How educated is Williamstown, New Jersey?
29.6% of adults (25+) in Williamstown hold a bachelor's degree or higher, and 8.4% hold a graduate or professional degree.