Green Knoll, NJ Demographics

A map of Green Knoll's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	4,321	4,114	63.6%	62.4%
Asian	1,471	1,574	21.7%	23.9%
Hispanic	419	495	6.2%	7.5%
Black	330	226	4.9%	3.4%
Multiracial	161	146	2.4%	2.2%
Native American/Other	87	39	1.3%	0.6%

Green Knoll, New Jersey has an estimated population of 6,789, a slight increase from the 6,594 recorded in the 2020 Census. The population is 63.6% White, 21.7% Asian, 6.2% Hispanic, 4.9% Black, 2.4% Multiracial, and 1.3% Native American/Other. This demographic dot map shows the population of Green Knoll, with one dot drawn for each person counted by the Census, color-coded by race.

Green Knoll has become slightly less 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 Green Knoll, that probability was 54.6% in 2020 and 54.1% in the most recent ACS estimates.

Green Knoll is ranked the 236th 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). Green Knoll was ranked the 242nd most populous place in the 2020 Census.

Green Knoll's White Population

4,321 residents of Green Knoll, or 63.6% of the population, identify as White. The share of White residents in Green Knoll is considerably higher than in New Jersey overall, where 50.9% of the population is White. Green Knoll ranks 481st statewide in terms of White residents as a share of the population, out of 700 places.

Since the 2020 Census, Green Knoll's White population has grown by an estimated 5.0%. White residents' share of Green Knoll's population has increased from 62.4% to 63.6%.

Green Knoll is more White than neighboring Somerville (51.8% White), and Raritan (47% White). Green Knoll is less White than neighboring Bridgewater Center (70.4% White), Martinsville (65.6% White), and Pluckemin (94.5% White).

Green Knoll's Black Population

330 residents of Green Knoll, or 4.9% of the population, identify as Black. The share of Black residents in Green Knoll is lower than in New Jersey overall, where 12.2% of the population is Black. Green Knoll ranks 317th statewide in terms of Black residents as a share of the population, out of 700 places.

Since the 2020 Census, Green Knoll's Black population has grown by an estimated 46.0%. Black residents' share of Green Knoll's population has increased from 3.4% to 4.9%.

Green Knoll is more Black than neighboring Martinsville (1% Black), Raritan (4% Black), and Pluckemin (0.2% Black). Green Knoll is less Black than neighboring Bridgewater Center (5.6% Black), and Somerville (11.3% Black).

Green Knoll's Asian Population

1,471 residents of Green Knoll, or 21.7% of the population, identify as Asian. The share of Asian residents in Green Knoll is considerably higher than in New Jersey overall, where 10% of the population is Asian. Green Knoll ranks 59th statewide in terms of Asian residents as a share of the population, out of 700 places.

Since the 2020 Census, Green Knoll's Asian population has declined by an estimated 6.5%. Asian residents' share of Green Knoll's population has decreased from 23.9% to 21.7%.

Green Knoll is more Asian than neighboring Bridgewater Center (11.2% Asian), Somerville (10.8% Asian), Martinsville (16.8% Asian), and Pluckemin (1.6% Asian).

Green Knoll's Hispanic Population

419 residents of Green Knoll, or 6.2% of the population, identify as Hispanic. The share of Hispanic residents in Green Knoll is significantly lower than in New Jersey overall, where 22.5% of the population is Hispanic. Green Knoll ranks 434th statewide in terms of Hispanic residents as a share of the population, out of 700 places.

Since the 2020 Census, Green Knoll's Hispanic population has declined by an estimated 15.4%. Hispanic residents' share of Green Knoll's population has decreased from 7.5% to 6.2%.

Green Knoll is more Hispanic than neighboring Bridgewater Center (5.6% Hispanic), and Pluckemin (3.7% Hispanic). Green Knoll is less Hispanic than neighboring Somerville (21.1% Hispanic), Martinsville (8% Hispanic), and Raritan (21.7% Hispanic).

Green Knoll's Native American/Other Population

87 residents of Green Knoll, or 1.3% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Green Knoll is comparable to the share in New Jersey overall, where 0.9% of the population is Native American/Other. Green Knoll ranks 333rd statewide in terms of Native American/Other residents as a share of the population, out of 700 places.

Since the 2020 Census, Green Knoll's Native American/Other population has grown by an estimated 123.1%. Native American/Other residents' share of Green Knoll's population has increased from 0.6% to 1.3%.

Green Knoll is more Native American/Other than neighboring Bridgewater Center (0.5% Native American/Other), Somerville (0.6% Native American/Other), Martinsville (1.2% Native American/Other), Raritan (0.3% Native American/Other), and Pluckemin (0% Native American/Other).

Green Knoll's Multiracial Population

161 residents of Green Knoll, or 2.4% of the population, identify as Multiracial. The share of Multiracial residents in Green Knoll is comparable to the share in New Jersey overall, where 3.5% of the population is Multiracial. Green Knoll ranks 574th statewide in terms of Multiracial residents as a share of the population, out of 700 places.

Since the 2020 Census, Green Knoll's Multiracial population has grown by an estimated 10.3%. Multiracial residents' share of Green Knoll's population has remained roughly unchanged at 2.4%.

Green Knoll is more Multiracial than neighboring Pluckemin (0% Multiracial). Green Knoll is less Multiracial than neighboring Bridgewater Center (6.8% Multiracial), Somerville (4.3% Multiracial), Martinsville (7.4% Multiracial), and Raritan (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.