Rocky Hill borough, New Jersey Demographics & Population 2026
As of 2026, Rocky Hill borough, New Jersey has a total population of 814, the 575th largest city in New Jersey, with a median household income of $127,344, which is 26% higher than the state average. The poverty rate is 4.3%.
Key Takeaways
- An exceptionally low poverty rate of 4.3% — among the lowest in New Jersey.
- 72.5% of adults hold a bachelor's degree or higher — top 10% in New Jersey.
Rocky Hill borough Quick Facts
How Rocky Hill borough Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
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: 65 | National average: 60
Education
Educational Attainment (Adults 25+)
Rocky Hill borough Rankings in New Jersey
Explore New Jersey Rankings
Other Cities in Somerset County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| North Plainfield borough | 22,667 | $83,529 | 14.0% | $350,700 |
| Somerville borough | 12,958 | $103,869 | 6.2% | $403,600 |
| Bound Brook borough | 12,023 | $80,876 | 10.6% | $362,900 |
| Manville borough | 10,870 | $93,872 | 12.3% | $321,100 |
| Raritan borough | 8,192 | $103,699 | 7.0% | $449,200 |
| Bernardsville borough | 7,871 | $231,006 | 1.0% | $737,600 |
| Watchung borough | 6,429 | $166,536 | 2.1% | $833,300 |
| South Bound Brook borough | 4,833 | $102,019 | 16.4% | $345,300 |
| Peapack and Gladstone borough | 2,547 | $184,231 | 2.4% | $843,400 |
| Far Hills borough | 1,004 | $152,188 | 5.3% | $798,900 |
Cities Similar to Rocky Hill borough
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| New Vernon CDP | 791 | N/A | $1,606,500 | 75.0% | 11.6% |
| Stone Harbor borough | 853 | $128,235 | $1,898,800 | 69.6% | 5.0% |
| Grenloch CDP | 748 | $128,333 | $228,700 | 29.6% | 5.3% |
| Sweetwater CDP | 805 | $104,191 | $521,500 | 52.0% | 0.0% |
| Branchville borough | 724 | $124,167 | $299,600 | 24.3% | 4.8% |
Population Overview
Rocky Hill borough is a small community located in New Jersey, within Somerset County. The total population is 814. It ranks as the 575th most populous out of 700 cities and towns in New Jersey.
Age Demographics
The median age in Rocky Hill borough is 42.8 years. This is 7% higher than the state median of 40.1 years.
Economy, Income & Housing
The median household income in Rocky Hill borough is $127,344. This is 26% higher than the state median of $101,050. Compared to the national median of $78,538, household income here is 62% higher. The poverty rate stands at 4.3%. This is 56% lower than the state poverty rate of 9.8%. This exceptionally low poverty rate indicates strong economic prosperity across the community. The unemployment rate is 6.1%. This is 1% lower than the state rate of 6.2%. The median home value is $608,200. Housing costs are 42% higher than the state median of $427,600. The home-value-to-income ratio is 4.8x. 75.9% of occupied housing units are owner-occupied. This homeownership rate is 19% higher than the state average of 63.7%.
Race & Ethnicity
The largest racial or ethnic group in Rocky Hill borough is White (non-Hispanic), making up 80.7% of the population. Hispanic or Latino residents account for 8.5%. The White (non-Hispanic) population is significantly higher than the state average (80.7% vs 51.9%). The Black or African American population (0.9%) is well below the state average of 12.3%. The Hispanic or Latino population (8.5%) is well below the state average of 21.9%. The Asian population (4.0%) is well below the state average of 9.8%.
Education
72.5% of residents aged 25 and older hold a bachelor's degree or higher. This places Rocky Hill borough in the top 10% of all cities in the state for educational attainment. This is 69% higher than the state rate of 42.9%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 99.3%. Notably, 35.6% of adults hold a graduate or professional degree, indicating a highly educated workforce.
Data Sources & Methodology
All demographic data for Rocky Hill borough, New Jersey is sourced from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates (2019-2023). The ACS collects data from approximately 3.5 million households annually, providing reliable estimates for communities of all sizes. 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. For official data, visit data.census.gov.
Free data download: Get all New Jersey city and county demographics as CSV. Download Cities CSV | Download Counties CSV
Frequently Asked Questions
What is the population of Rocky Hill borough, New Jersey?
Rocky Hill borough, New Jersey has a population of 814 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Rocky Hill borough, NJ?
The median household income in Rocky Hill borough is $127,344, which is 62% higher the national median of $78,538.
What is the poverty rate in Rocky Hill borough, NJ?
The poverty rate in Rocky Hill borough is 4.3%. This means approximately 35 residents live below the federal poverty line.
What is the racial makeup of Rocky Hill borough, New Jersey?
Rocky Hill borough's population is 80.7% White, 0.9% Black, 8.5% Hispanic/Latino, and 4.0% Asian.
What is the median home value in Rocky Hill borough, NJ?
The median home value in Rocky Hill borough is $608,200. The home-value-to-income ratio is 4.8x.
How educated is Rocky Hill borough, New Jersey?
72.5% of adults (25+) in Rocky Hill borough hold a bachelor's degree or higher, and 35.6% hold a graduate or professional degree.