Middlesex County Demographics

A map of Middlesex County's Population by Race

Middlesex County, Massachusetts had a population of 1,632,002 in 2020. It was 66.5% White, 5.0% Black, 12.8% Asian, 8.8% Hispanic, 1.8% Native American/Other, and 5.0% 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 most populous county of the 14 counties in Massachusetts.

Middlesex County's White Population

1,085,919 residents of Middlesex County identify as White, or 66.5%. This makes the White share of the population of Middlesex County roughly similar to the White share of the population of Massachusetts (67.6% White). Of the 14 counties in Massachusetts, Middlesex County is ranked #11 in terms of White residents as a share of the population.

Middlesex County is more White than neighboring Suffolk County (44.2% White), and Essex County (66.2% White). Middlesex County is less White than neighboring Norfolk County (70.6% White), Worcester County (70.9% White), and Hillsborough County (81% White).

Middlesex County's Black Population

80,996 residents of Middlesex County identify as Black, or 5.0%. This makes the Black share of the population of Middlesex County roughly similar to the Black share of the population of Massachusetts (6.5% Black). Of the 14 counties in Massachusetts, Middlesex County is ranked #7 in terms of Black residents as a share of the population.

Middlesex County is more Black than neighboring Hillsborough County (2.4% Black), and Essex County (3.3% Black). Middlesex County is less Black than neighboring Norfolk County (6.8% Black), Suffolk County (17% Black), and Worcester County (5.1% Black).

Middlesex County's Asian Population

209,632 residents of Middlesex County identify as Asian, or 12.8%. This makes the Asian share of the population of Middlesex County slightly larger than the Asian share of the population of Massachusetts (7.2% Asian). Of the 14 counties in Massachusetts, Middlesex County is ranked #1 in terms of Asian residents as a share of the population.

Middlesex County is more Asian than neighboring Norfolk County (12.2% Asian), Suffolk County (10.1% Asian), Worcester County (5.3% Asian), Hillsborough County (3.9% Asian), and Essex County (3.6% Asian).

Middlesex County's Hispanic Population

143,245 residents of Middlesex County identify as Hispanic, or 8.8%. This makes the Hispanic share of the population of Middlesex County roughly similar to the Hispanic share of the population of Massachusetts (12.6% Hispanic). Of the 14 counties in Massachusetts, Middlesex County is ranked #7 in terms of Hispanic residents as a share of the population.

Middlesex County is more Hispanic than neighboring Norfolk County (5.2% Hispanic), and Hillsborough County (7.9% Hispanic). Middlesex County is less Hispanic than neighboring Suffolk County (22.4% Hispanic), Worcester County (13% Hispanic), and Essex County (22.6% Hispanic).

Middlesex County's Native American/Other Population

29,961 residents of Middlesex County identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other, or 1.8%. 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 Massachusetts (1.5% Native American/Other). Of the 14 counties in Massachusetts, Middlesex County is ranked #4 in terms of Native American/Other residents as a share of the population.

Middlesex County is more Native American/Other than neighboring Norfolk County (1.1% Native American/Other), Suffolk County (1.6% Native American/Other), Worcester County (1.2% Native American/Other), Hillsborough County (0.7% Native American/Other), and Essex County (1% Native American/Other).

Middlesex County's Multiracial Population

82,249 residents of Middlesex County identify as Multiracial, or 5.0%. This makes the Multiracial share of the population of Middlesex County roughly similar to the Multiracial share of the population of Massachusetts (4.7% Multiracial). Of the 14 counties in Massachusetts, Middlesex County is ranked #5 in terms of Multiracial residents as a share of the population.

Middlesex County is more Multiracial than neighboring Norfolk County (4.1% Multiracial), Suffolk County (4.7% Multiracial), Worcester County (4.4% Multiracial), Hillsborough County (4.1% Multiracial), and Essex County (3.3% Multiracial).

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