Overview
752
Total Population
47.0
Median age
46.01%
Female population %
117.3:100
Gender ratio (M:F)
60-64 years
Largest age group
56.0
Total dependency ratio
White
Largest racial group
39
Hispanic population
Sources: U.S. Census Bureau, American Community Survey (ACS) 2021
TABLE OF CONTENTS
Age
Rocky Hill's population is old compared to the rest of the country:
- The median age in Rocky Hill is 47.0, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
- Rocky Hill's population under 18 was 19.81%, compared to the 22.51% nationwide.
- Rocky Hill's elderly or the senior population (over 65 age) was 18.75% as compared to 16.04% nationwide.
- Of the total population in Rocky Hill, 17.15% were under the age of 15, 15.82% aged 15 to 29, 48.27% aged 30 to 64, 17.15% aged 65 to 84, and 1.60% were 85 years of age and older.

Read more about Rocky Hill, NJ population by age ➔
Gender
There are 60 less females than males in Rocky Hill:
- The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 46.01% females and 53.99% males in Rocky Hill, NJ.
- The Rocky Hill, NJ gender ratio is 117.3:100 i.e. 117.3 men to 100 women (1.173).
- For male population, the largest age group is 60-64 years with a population of 51.
- For the female population, the largest age group is 55-59 years with a population of 52.

Read more about Rocky Hill, NJ population by gender ➔
Race / Ethnicity
Rocky Hill's population has become increasingly diverse:
- Racial distribution of Rocky Hill population: 91.09% are White, 2.13% are Black or African American, 0.27% are American Indian and Alaska Native, 2.26% are Asian, 0.93% are some other race and 3.32% are multiracial.
- Rocky Hill's racial breakdown clearly shows that there is an absolute majority of White population in the borough.
- By ethnicity, 39 is Hispanic or Latino (of any race), and 713 (94.81% of the total population) is Non-Hispanic.
- The largest racial group in Rocky Hill is White with a population of 685 (91.09% of the total population).

Read more about Rocky Hill, NJ population by race ➔
Year by year
Rocky Hill's population has already reached its peak and is showing a trend of decline:
- The peak population was 739 in the year 2020
- From 2000 to 2010, Rocky Hill's population increased by 28 (4.27%), as compared to the national growth of 9.63%.
- From 2010 to 2020, Rocky Hill's population increased by 56 (8.20%), according to Census Bureau's Population Estimates Program. For the same period, the rate of growth for the United States was 7.17%.
- Between the year 2000 and 2022, Rocky Hill's population was lowest in year 2001 at 651.

Read more about Rocky Hill, NJ population by year ➔
References
- U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates
- U.S. Census Bureau Population Estimates Population Estimates Program (PEP)