Middlesex County Demographics

A map of Middlesex County's Population by Race

Middlesex County, Connecticut had a population of 164,245 in 2020. It was 80.3% White, 4.9% Black, 3.0% Asian, 7.3% Hispanic, 0.6% Native American/Other, and 3.9% 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 6th most populous county of the 8 counties in Connecticut.

Middlesex County's White Population

131,954 residents of Middlesex County identify as White, or 80.3%. This makes the White share of the population of Middlesex County larger than the White share of the population of Connecticut (63.2% White). Of the 8 counties in Connecticut, Middlesex County is ranked #2 in terms of White residents as a share of the population.

Middlesex County is more White than neighboring New Haven County (58.9% White), New London County (72.6% White), Hartford County (58.2% White), Tolland County (80.1% White), and Suffolk County (63.4% White).

Middlesex County's Black Population

8,001 residents of Middlesex County identify as Black, or 4.9%. This makes the Black share of the population of Middlesex County slightly less than the Black share of the population of Connecticut (10% Black). Of the 8 counties in Connecticut, Middlesex County is ranked #5 in terms of Black residents as a share of the population.

Middlesex County is more Black than neighboring Tolland County (3.4% Black). Middlesex County is less Black than neighboring New Haven County (12.8% Black), New London County (5.4% Black), Hartford County (13.1% Black), and Suffolk County (7% Black).

Middlesex County's Asian Population

4,923 residents of Middlesex County identify as Asian, or 3.0%. This makes the Asian share of the population of Middlesex County roughly similar to the Asian share of the population of Connecticut (4.7% Asian). Of the 8 counties in Connecticut, Middlesex County is ranked #6 in terms of Asian residents as a share of the population.

Middlesex County is less Asian than neighboring New Haven County (4.3% Asian), New London County (4% Asian), Hartford County (5.9% Asian), Tolland County (5.6% Asian), and Suffolk County (4.3% Asian).

Middlesex County's Hispanic Population

11,928 residents of Middlesex County identify as Hispanic, or 7.3%. This makes the Hispanic share of the population of Middlesex County slightly less than the Hispanic share of the population of Connecticut (17.3% Hispanic). Of the 8 counties in Connecticut, Middlesex County is ranked #7 in terms of Hispanic residents as a share of the population.

Middlesex County is more Hispanic than neighboring Tolland County (6.5% Hispanic). Middlesex County is less Hispanic than neighboring New Haven County (19.7% Hispanic), New London County (11.5% Hispanic), Hartford County (18.5% Hispanic), and Suffolk County (21.8% Hispanic).

Middlesex County's Native American/Other Population

1,001 residents of Middlesex County identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other, or 0.6%. 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 Connecticut (1% Native American/Other). Of the 8 counties in Connecticut, Middlesex County is ranked #7 in terms of Native American/Other residents as a share of the population.

Middlesex County is less Native American/Other than neighboring New Haven County (0.9% Native American/Other), New London County (1.3% Native American/Other), Hartford County (0.8% Native American/Other), and Suffolk County (0.8% Native American/Other).

Middlesex County's Multiracial Population

6,438 residents of Middlesex County identify as Multiracial, or 3.9%. This makes the Multiracial share of the population of Middlesex County roughly similar to the Multiracial share of the population of Connecticut (3.8% Multiracial). Of the 8 counties in Connecticut, Middlesex County is ranked #4 in terms of Multiracial residents as a share of the population.

Middlesex County is more Multiracial than neighboring New Haven County (3.5% Multiracial), Hartford County (3.5% Multiracial), Tolland County (3.8% Multiracial), and Suffolk County (2.7% Multiracial). Middlesex County is less Multiracial than neighboring New London County (5.2% Multiracial).

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