Middlesex County Demographics

A map of Middlesex County's Population by Race

Middlesex County, New Jersey had a population of 863,162 in 2020. It was 38.6% White, 9.1% Black, 26.4% Asian, 22.4% Hispanic, 1.0% Native American/Other, and 2.5% Multiracial. This map presents the population of Middlesex County, with one dot drawn for each person counted in the 2020 Census, color-coded by race.

Middlesex County is the 3rd most populous county of the 21 counties in New Jersey.

Middlesex County's White Population

333,158 residents of Middlesex County identify as White, or 38.6%. This makes the White share of the population of Middlesex County less than the White share of the population of New Jersey (51.9% White). Of the 21 counties in New Jersey, Middlesex County is ranked #18 in terms of White residents as a share of the population.

Middlesex County is more White than neighboring Union County (36.7% White). Middlesex County is less White than neighboring Somerset County (51.4% White), Monmouth County (71.6% White), Richmond County (56.1% White), and Mercer County (43.5% White).

Middlesex County's Black Population

78,719 residents of Middlesex County identify as Black, or 9.1%. This makes the Black share of the population of Middlesex County roughly similar to the Black share of the population of New Jersey (12.4% Black). Of the 21 counties in New Jersey, Middlesex County is ranked #12 in terms of Black residents as a share of the population.

Middlesex County is more Black than neighboring Somerset County (8.8% Black), and Monmouth County (6.1% Black). Middlesex County is less Black than neighboring Union County (19.5% Black), Richmond County (9.4% Black), and Mercer County (18.7% Black).

Middlesex County's Asian Population

227,973 residents of Middlesex County identify as Asian, or 26.4%. This makes the Asian share of the population of Middlesex County larger than the Asian share of the population of New Jersey (10.2% Asian). Of the 21 counties in New Jersey, Middlesex County is ranked #1 in terms of Asian residents as a share of the population.

Middlesex County is more Asian than neighboring Somerset County (19.4% Asian), Union County (5.6% Asian), Monmouth County (5.6% Asian), Richmond County (11.9% Asian), and Mercer County (12.5% Asian).

Middlesex County's Hispanic Population

193,687 residents of Middlesex County identify as Hispanic, or 22.4%. This makes the Hispanic share of the population of Middlesex County roughly similar to the Hispanic share of the population of New Jersey (21.6% Hispanic). Of the 21 counties in New Jersey, Middlesex County is ranked #6 in terms of Hispanic residents as a share of the population.

Middlesex County is more Hispanic than neighboring Somerset County (16.6% Hispanic), Monmouth County (12.5% Hispanic), Richmond County (19.6% Hispanic), and Mercer County (21.7% Hispanic). Middlesex County is less Hispanic than neighboring Union County (34% Hispanic).

Middlesex County's Native American/Other Population

8,428 residents of Middlesex County identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other, or 1.0%. This makes the Native American/Other share of the population of Middlesex 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, Middlesex County is ranked #5 in terms of Native American/Other residents as a share of the population.

Middlesex County is more Native American/Other than neighboring Somerset County (0.7% Native American/Other), Monmouth County (0.8% Native American/Other), Richmond County (0.8% Native American/Other), and Mercer County (0.6% Native American/Other). Middlesex County is less Native American/Other than neighboring Union County (1.2% Native American/Other).

Middlesex County's Multiracial Population

21,197 residents of Middlesex County identify as Multiracial, or 2.5%. This makes the Multiracial share of the population of Middlesex County roughly similar to the Multiracial share of the population of New Jersey (3.1% Multiracial). Of the 21 counties in New Jersey, Middlesex County is ranked #20 in terms of Multiracial residents as a share of the population.

Middlesex County is more Multiracial than neighboring Richmond County (2.3% Multiracial). Middlesex County is less Multiracial than neighboring Somerset County (3.1% Multiracial), Union County (3% Multiracial), Monmouth County (3.4% Multiracial), and Mercer County (3% Multiracial).

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