Population By Race and Ethnicity in Middlesex, CT in 2018

Updated on June 16, 2025.

Based on the US Census Vintage data estimates, in 2018, the 163,053 population of Middlesex County, Connecticut comprised of 10,486 people who identified as Hispanic (6.43%), and 152,567 people who identified as Non-Hispanic (93.57%).

Race: The White Alone population was the largest racial group in Middlesex County, Connecticut with a population of 144,882 (88.86%); Black or African American Alone population was the second largest racial group with a population of 8,950 (5.49%); and Asian Alone was the third largest racial group with a population of 5,313 (3.26%).

Ethnicity: The White Alone - Non Hispanic population was the largest ethnic group in Middlesex County, Connecticut in 2018, with a population of 136,346 (83.62%); the second largest ethnic group was White Alone - Hispanic with a population of 8,536 (5.24%); and the third largest ethnic group was Black or African American Alone - Non Hispanic with a population of 7,825 (4.8%).

The charts and tables below shows the population and percentage of each racial and ethnicity group in Middlesex, Connecticut.

You can find similar information for other Connecticut counties, and for Connecticut.

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Hispanics and Non Hispanics in Middlesex, CT in 2018
Total Population:
Race in Middlesex, CT in 2018
Total Population:
Ethnicity in Middlesex, CT in 2018
Total Population:
Population By Race in Middlesex , CT in 2018
Race Population Percentage
Black or African American Alone 8,950 5.49%
White Alone 144,882 88.86%
American Indian and Alaska Native Alone 468 0.29%
Asian Alone 5,313 3.26%
Native Hawaiian And Pacific Islander Alone 106 0.07%
Two Or More Races 3,334 2.05%
Population By Ethnicity in Middlesex , CT in 2018
Ethnicity Population Percentage
Black or African American Alone - Hispanic 1,125 0.69%
White Alone - Hispanic 8,536 5.24%
American Indian and Alaska Native Alone - Hispanic 210 0.13%
Asian Alone - Hispanic 113 0.07%
Native Hawaiian And Pacific Islander Alone - Hispanic 43 0.03%
Two Or More Races - Hispanic 459 0.28%
Black or African American Alone - Non Hispanic 7,825 4.8%
White Alone - Non Hispanic 136,346 83.62%
American Indian and Alaska Native Alone - Non Hispanic 258 0.16%
Asian Alone - Non Hispanic 5,200 3.19%
Native Hawaiian And Pacific Islander Alone - Non Hispanic 63 0.04%
Two Or More Races - Non Hispanic 2,875 1.76%