Rocky Hill, NJ Demographics

A map of Rocky Hill's Population by Race

Rocky Hill, New Jersey has an estimated population of 819, a large increase from the 743 recorded in the 2020 Census. The population is 79.9% White, 7.7% Hispanic, 6.2% Asian, 5.0% Multiracial, 1.1% Native American/Other, and 0.1% Black. This demographic dot map shows the population of Rocky Hill, with one dot drawn for each person counted by the Census, color-coded by race.

Rocky Hill has become more racially diverse since the 2020 Census. It is considerably less diverse than New Jersey overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Rocky Hill, that probability was 32.7% in 2020 and 35.0% in the most recent ACS estimates.

Rocky Hill is ranked the 572nd most populous place in New Jersey, out of 700 places. This ranking is based on the Census definition of a place, which includes incorporated places like cities, towns, and villages, as well as unincorporated census-designated places (CDPs). Rocky Hill was ranked the 583rd most populous place in the 2020 Census.

Rocky Hill's White Population

654 residents of Rocky Hill, or 79.9% of the population, identify as White. The share of White residents in Rocky Hill is significantly higher than in New Jersey overall, where 50.9% of the population is White. Rocky Hill ranks 240th statewide in terms of White residents as a share of the population, out of 700 places.

Since the 2020 Census, Rocky Hill's White population has grown by an estimated 8.3%. White residents' share of Rocky Hill's population has decreased from 81.3% to 79.9%.

Rocky Hill is more White than neighboring Kingston (74.9% White), Princeton (57.8% White), Harlingen (51.3% White), and Ten Mile Run (17.4% White). Rocky Hill is less White than neighboring East Rocky Hill (87.2% White).

Rocky Hill's Black Population

1 residents of Rocky Hill, or 0.1% of the population, identify as Black. The share of Black residents in Rocky Hill is considerably lower than in New Jersey overall, where 12.2% of the population is Black. Rocky Hill ranks 654th statewide in terms of Black residents as a share of the population, out of 700 places.

Since the 2020 Census, Rocky Hill's Black population has declined by an estimated 66.7%. Black residents' share of Rocky Hill's population has remained roughly unchanged at 0.1%.

Rocky Hill is more Black than neighboring Harlingen (0% Black). Rocky Hill is less Black than neighboring East Rocky Hill (1.3% Black), Kingston (5% Black), Princeton (6.1% Black), and Ten Mile Run (5.7% Black).

Rocky Hill's Asian Population

51 residents of Rocky Hill, or 6.2% of the population, identify as Asian. The share of Asian residents in Rocky Hill is slightly lower than in New Jersey overall, where 10% of the population is Asian. Rocky Hill ranks 275th statewide in terms of Asian residents as a share of the population, out of 700 places.

Since the 2020 Census, Rocky Hill's Asian population has grown by an estimated 41.7%. Asian residents' share of Rocky Hill's population has increased from 4.8% to 6.2%.

Rocky Hill is more Asian than neighboring East Rocky Hill (0.4% Asian). Rocky Hill is less Asian than neighboring Kingston (9.2% Asian), Princeton (21.5% Asian), Harlingen (42.3% Asian), and Ten Mile Run (65.6% Asian).

Rocky Hill's Hispanic Population

63 residents of Rocky Hill, or 7.7% of the population, identify as Hispanic. The share of Hispanic residents in Rocky Hill is considerably lower than in New Jersey overall, where 22.5% of the population is Hispanic. Rocky Hill ranks 352nd statewide in terms of Hispanic residents as a share of the population, out of 700 places.

Since the 2020 Census, Rocky Hill's Hispanic population has declined by an estimated 10.0%. Hispanic residents' share of Rocky Hill's population has decreased from 9.4% to 7.7%.

Rocky Hill is more Hispanic than neighboring East Rocky Hill (0.4% Hispanic), and Harlingen (6.4% Hispanic). Rocky Hill is less Hispanic than neighboring Kingston (9.6% Hispanic), Princeton (8% Hispanic), and Ten Mile Run (9.3% Hispanic).

Rocky Hill's Native American/Other Population

9 residents of Rocky Hill, or 1.1% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Rocky Hill is comparable to the share in New Jersey overall, where 0.9% of the population is Native American/Other. Rocky Hill ranks 272nd statewide in terms of Native American/Other residents as a share of the population, out of 700 places.

Since the 2020 Census, Rocky Hill's Native American/Other population has grown by an estimated 80.0%. Native American/Other residents' share of Rocky Hill's population has remained roughly unchanged at 1.1%.

Rocky Hill is more Native American/Other than neighboring East Rocky Hill (0% Native American/Other), Harlingen (0% Native American/Other), and Ten Mile Run (0% Native American/Other). Rocky Hill is less Native American/Other than neighboring Kingston (1.4% Native American/Other).

Rocky Hill's Multiracial Population

41 residents of Rocky Hill, or 5.0% of the population, identify as Multiracial. The share of Multiracial residents in Rocky Hill is comparable to the share in New Jersey overall, where 3.5% of the population is Multiracial. Rocky Hill ranks 297th statewide in terms of Multiracial residents as a share of the population, out of 700 places.

Since the 2020 Census, Rocky Hill's Multiracial population has grown by an estimated 64.0%. Multiracial residents' share of Rocky Hill's population has increased from 3.4% to 5.0%.

Rocky Hill is more Multiracial than neighboring Kingston (0% Multiracial), Harlingen (0% Multiracial), and Ten Mile Run (2.1% Multiracial). Rocky Hill is less Multiracial than neighboring East Rocky Hill (10.6% Multiracial), and Princeton (5.4% Multiracial).

Sources: Most recent population estimates are from the 2020-2024 American Community Survey 5-Year Estimates. 2020 population counts and map data are from 2020 Census State Redistricting Data. Geographic data are from Census TIGER/Line Shapefiles.