Hamilton Square, New Jersey Demographics & Population 2026
During the 2020–2024 ACS period, Hamilton Square, New Jersey had a total population of 11,622, the 122nd largest community in New Jersey, with a median household income of $138,162, which is 33% higher than the state average. The poverty rate is 2.3%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Household income is 33% above the state average — one of the wealthiest communities in New Jersey.
- An exceptionally low poverty rate of 2.3% — among the lowest in New Jersey.
Hamilton Square Quick Facts
How Hamilton Square 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 | 11,643 | 11,622 | -0.2% |
| Median household income | $135,694 | $138,162 | +1.8% |
| Median home value | $376,900 | $397,000 | +5.3% |
How Hamilton Square 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+)
Hamilton Square Rankings in New Jersey
Explore New Jersey Rankings
Other Cities in Mercer County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Trenton | 90,338 | $52,537 | 21.6% | $160,700 |
| Princeton | 30,756 | $192,079 | 6.1% | $1,050,600 |
| Mercerville | 13,535 | $128,277 | 3.2% | $358,600 |
| White Horse | 10,507 | $105,758 | 2.6% | $308,200 |
| Twin Rivers | 8,382 | $100,833 | 3.5% | $301,400 |
| Yardville | 6,301 | $103,274 | 13.2% | $360,100 |
| Hightstown | 5,920 | $108,987 | 2.1% | $342,600 |
| Lawrenceville | 3,924 | $122,614 | 0.3% | $411,900 |
| Robbinsville Center | 3,777 | $134,388 | 11.1% | $526,300 |
| The College of New Jersey | 3,658 | N/A | 87.2% | N/A |
Cities Similar to Hamilton Square
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Greentree | 11,537 | $145,823 | $438,400 | 71.4% | 3.6% |
| Ringwood | 11,657 | $152,414 | $449,800 | 52.5% | 2.5% |
| Ridgefield | 11,498 | $118,059 | $646,200 | 46.5% | 5.1% |
| Hasbrouck Heights | 12,115 | $123,734 | $552,900 | 42.1% | 6.0% |
| Pompton Lakes | 11,047 | $124,454 | $442,400 | 43.8% | 8.5% |
Population Overview
Hamilton Square is a small city located in New Jersey, within Mercer County. The total population is 11,622. It ranks as the 122nd most populous out of 700 Census-designated places in New Jersey.
Age Demographics
The median age in Hamilton Square is 44.9 years. This is 12% higher than the state median of 40.1 years.
Economy, Income & Housing
The median household income in Hamilton Square is $138,162. This is 33% higher than the state median of $103,556. It is also 71% higher than the national median of $80,734. The poverty rate stands at 2.3%. This is 77% lower than the state poverty rate of 9.7%. This exceptionally low poverty rate indicates strong economic prosperity across the community. The unemployment rate is 3.4%. This is 46% lower than the state rate of 6.3%. The median home value is $397,000. Housing costs are 13% lower than the state median of $454,400. With a home-value-to-income ratio of just 2.9x, Hamilton Square is one of the most affordable housing markets in the area. 95.6% of occupied housing units are owner-occupied. This homeownership rate is 50% higher than the state average of 63.8%.
Race & Ethnicity
The largest racial or ethnic group in Hamilton Square is White (non-Hispanic), making up 80.0% of the population. Hispanic or Latino residents account for 9.4%. The White (non-Hispanic) population is significantly higher than the state average (80.0% vs 50.9%). The Black or African American population (3.4%) is well below the state average of 12.2%. The Hispanic or Latino population (9.4%) is well below the state average of 22.5%.
Education
46.4% of residents aged 25 and older hold a bachelor's degree or higher. This is 6% higher 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 94.8%. Notably, 16.0% of adults hold a graduate or professional degree, indicating a highly educated workforce.
Data Sources & Methodology
All demographic data for Hamilton Square, 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 Hamilton Square, New Jersey?
Hamilton Square, New Jersey has a population of 11,622 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Hamilton Square, NJ?
The median household income in Hamilton Square is $138,162, which is 71% higher than the national median of $80,734.
What is the poverty rate in Hamilton Square, NJ?
The poverty rate in Hamilton Square is 2.3%. This means approximately 256 residents live below the federal poverty line.
What is the racial makeup of Hamilton Square, New Jersey?
Hamilton Square's population is 80.0% White, 3.4% Black, 9.4% Hispanic/Latino, and 5.0% Asian.
What is the median home value in Hamilton Square, NJ?
The median home value in Hamilton Square is $397,000. The home-value-to-income ratio is 2.9x.
How educated is Hamilton Square, New Jersey?
46.4% of adults (25+) in Hamilton Square hold a bachelor's degree or higher, and 16.0% hold a graduate or professional degree.