Iselin, NJ Demographics

A map of Iselin's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
Asian	9,444	11,534	48.3%	57.4%
White	4,516	4,749	23.1%	23.6%
Hispanic	2,894	1,864	14.8%	9.3%
Black	2,103	1,275	10.8%	6.3%
Multiracial	435	431	2.2%	2.1%
Native American/Other	159	235	0.8%	1.2%

Iselin, New Jersey has an estimated population of 19,551, a slight decrease from the 20,088 recorded in the 2020 Census. The population is 48.3% Asian, 23.1% White, 14.8% Hispanic, 10.8% Black, 2.2% Multiracial, and 0.8% Native American/Other. This demographic dot map shows the population of Iselin, with one dot drawn for each person counted by the Census, color-coded by race.

Iselin has become considerably more racially diverse since the 2020 Census. It is more 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 Iselin, that probability was 60.1% in 2020 and 67.9% in the most recent ACS estimates.

Iselin is ranked the 60th 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). Iselin was ranked the 57th most populous place in the 2020 Census.

Iselin's White Population

4,516 residents of Iselin, or 23.1% of the population, identify as White. The share of White residents in Iselin is significantly lower than in New Jersey overall, where 50.9% of the population is White. Iselin ranks 660th statewide in terms of White residents as a share of the population, out of 700 places.

Since the 2020 Census, Iselin's White population has declined by an estimated 4.9%. White residents' share of Iselin's population has decreased from 23.6% to 23.1%.

Iselin is less White than neighboring Menlo Park Terrace (26.9% White), Colonia (56.4% White), Woodbridge (38% White), Fords (42% White), and Hopelawn (23.7% White).

Iselin's Black Population

2,103 residents of Iselin, or 10.8% of the population, identify as Black. The share of Black residents in Iselin is comparable to the share in New Jersey overall, where 12.2% of the population is Black. Iselin ranks 197th statewide in terms of Black residents as a share of the population, out of 700 places.

Since the 2020 Census, Iselin's Black population has grown by an estimated 64.9%. Black residents' share of Iselin's population has increased from 6.3% to 10.8%.

Iselin is more Black than neighboring Colonia (5.1% Black), Woodbridge (9.4% Black), and Hopelawn (2.5% Black). Iselin is less Black than neighboring Menlo Park Terrace (13.1% Black), and Fords (13.5% Black).

Iselin's Asian Population

9,444 residents of Iselin, or 48.3% of the population, identify as Asian. The share of Asian residents in Iselin is significantly higher than in New Jersey overall, where 10% of the population is Asian. Iselin ranks 8th statewide in terms of Asian residents as a share of the population, out of 700 places.

Since the 2020 Census, Iselin's Asian population has declined by an estimated 18.1%. Asian residents' share of Iselin's population has decreased from 57.4% to 48.3%.

Iselin is more Asian than neighboring Menlo Park Terrace (31.1% Asian), Colonia (15.6% Asian), Woodbridge (25.2% Asian), Fords (16.8% Asian), and Hopelawn (19.6% Asian).

Iselin's Hispanic Population

2,894 residents of Iselin, or 14.8% of the population, identify as Hispanic. The share of Hispanic residents in Iselin is lower than in New Jersey overall, where 22.5% of the population is Hispanic. Iselin ranks 357th statewide in terms of Hispanic residents as a share of the population, out of 700 places.

Since the 2020 Census, Iselin's Hispanic population has grown by an estimated 55.3%. Hispanic residents' share of Iselin's population has increased from 9.3% to 14.8%.

Iselin is less Hispanic than neighboring Menlo Park Terrace (22% Hispanic), Colonia (17.5% Hispanic), Woodbridge (24.6% Hispanic), Fords (24% Hispanic), and Hopelawn (50% Hispanic).

Iselin's Native American/Other Population

159 residents of Iselin, or 0.8% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Iselin is comparable to the share in New Jersey overall, where 0.9% of the population is Native American/Other. Iselin ranks 81st statewide in terms of Native American/Other residents as a share of the population, out of 700 places.

Since the 2020 Census, Iselin's Native American/Other population has declined by an estimated 32.3%. Native American/Other residents' share of Iselin's population has remained roughly unchanged at 0.8%.

Iselin is more Native American/Other than neighboring Woodbridge (0% Native American/Other), and Hopelawn (0% Native American/Other). Iselin is less Native American/Other than neighboring Colonia (1.9% Native American/Other), and Fords (1% Native American/Other).

Iselin's Multiracial Population

435 residents of Iselin, or 2.2% of the population, identify as Multiracial. The share of Multiracial residents in Iselin is comparable to the share in New Jersey overall, where 3.5% of the population is Multiracial. Iselin ranks 588th statewide in terms of Multiracial residents as a share of the population, out of 700 places.

Since the 2020 Census, Iselin's Multiracial population has remained roughly the same. Multiracial residents' share of Iselin's population has remained roughly unchanged at 2.2%.

Iselin is less Multiracial than neighboring Menlo Park Terrace (6.2% Multiracial), Colonia (3.6% Multiracial), Woodbridge (2.8% Multiracial), Fords (2.7% Multiracial), and Hopelawn (4.2% 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.