Union County Demographics

A map of Union County's Population by Race

Union County, New Jersey had a population of 575,345 in 2020. It was 36.7% White, 19.5% Black, 5.6% Asian, 34.0% Hispanic, 1.2% Native American/Other, and 3.0% Multiracial. This map presents the population of Union County, with one dot drawn for each person counted in the 2020 Census, color-coded by race.

Union County is the 7th most populous county of the 21 counties in New Jersey.

Union County's White Population

211,245 residents of Union County identify as White, or 36.7%. This makes the White share of the population of Union County less than the White share of the population of New Jersey (51.9% White). Of the 21 counties in New Jersey, Union County is ranked #19 in terms of White residents as a share of the population.

Union County is more White than neighboring Essex County (27.2% White), and Hudson County (28.5% White). Union County is less White than neighboring Richmond County (56.1% White), Middlesex County (38.6% White), and Morris County (67% White).

Union County's Black Population

112,261 residents of Union County identify as Black, or 19.5%. This makes the Black share of the population of Union County slightly larger than the Black share of the population of New Jersey (12.4% Black). Of the 21 counties in New Jersey, Union County is ranked #2 in terms of Black residents as a share of the population.

Union County is more Black than neighboring Richmond County (9.4% Black), Middlesex County (9.1% Black), Hudson County (9.8% Black), and Morris County (3.1% Black). Union County is less Black than neighboring Essex County (37.5% Black).

Union County's Asian Population

31,963 residents of Union County identify as Asian, or 5.6%. This makes the Asian share of the population of Union County roughly similar to the Asian share of the population of New Jersey (10.2% Asian). Of the 21 counties in New Jersey, Union County is ranked #12 in terms of Asian residents as a share of the population.

Union County is more Asian than neighboring Essex County (5.4% Asian). Union County is less Asian than neighboring Richmond County (11.9% Asian), Middlesex County (26.4% Asian), Hudson County (17% Asian), and Morris County (11.3% Asian).

Union County's Hispanic Population

195,519 residents of Union County identify as Hispanic, or 34.0%. This makes the Hispanic share of the population of Union County larger than the Hispanic share of the population of New Jersey (21.6% Hispanic). Of the 21 counties in New Jersey, Union County is ranked #4 in terms of Hispanic residents as a share of the population.

Union County is more Hispanic than neighboring Essex County (24.4% Hispanic), Richmond County (19.6% Hispanic), Middlesex County (22.4% Hispanic), and Morris County (15.1% Hispanic). Union County is less Hispanic than neighboring Hudson County (40.4% Hispanic).

Union County's Native American/Other Population

6,820 residents of Union County identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other, or 1.2%. This makes the Native American/Other share of the population of Union County roughly similar to the Native American/Other share of the population of New Jersey (0.9% Native American/Other). Of the 21 counties in New Jersey, Union County is ranked #3 in terms of Native American/Other residents as a share of the population.

Union County is more Native American/Other than neighboring Richmond County (0.8% Native American/Other), Middlesex County (1% Native American/Other), and Morris County (0.6% Native American/Other). Union County is less Native American/Other than neighboring Essex County (1.6% Native American/Other), and Hudson County (1.5% Native American/Other).

Union County's Multiracial Population

17,537 residents of Union County identify as Multiracial, or 3.0%. This makes the Multiracial share of the population of Union County roughly similar to the Multiracial share of the population of New Jersey (3.1% Multiracial). Of the 21 counties in New Jersey, Union County is ranked #14 in terms of Multiracial residents as a share of the population.

Union County is more Multiracial than neighboring Richmond County (2.3% Multiracial), Middlesex County (2.5% Multiracial), and Hudson County (2.8% Multiracial). Union County is less Multiracial than neighboring Essex County (3.9% Multiracial).

Source: 2020 Census State Redistricting Data and Census TIGER/Line Shapefiles.