Suffolk County Demographics

A map of Suffolk County's Population by Race

Suffolk County, New York had a population of 1,525,920 in 2020. It was 63.4% White, 7.0% Black, 4.3% Asian, 21.8% Hispanic, 0.8% Native American/Other, and 2.7% Multiracial. This map presents the population of Suffolk County, with one dot drawn for each person counted in the 2020 Census, color-coded by race.

Suffolk County is the 4th most populous county of the 62 counties in New York.

Suffolk County's White Population

967,330 residents of Suffolk County identify as White, or 63.4%. This makes the White share of the population of Suffolk County slightly larger than the White share of the population of New York (52.5% White). Of the 62 counties in New York, Suffolk County is ranked #53 in terms of White residents as a share of the population.

Suffolk County is more White than neighboring New Haven County (58.9% White), Fairfield County (57.7% White), and Hartford County (58.2% White). Suffolk County is less White than neighboring Middlesex County (80.3% White), and New London County (72.6% White).

Suffolk County's Black Population

107,268 residents of Suffolk County identify as Black, or 7.0%. This makes the Black share of the population of Suffolk County slightly less than the Black share of the population of New York (13.7% Black). Of the 62 counties in New York, Suffolk County is ranked #19 in terms of Black residents as a share of the population.

Suffolk County is more Black than neighboring Middlesex County (4.9% Black), and New London County (5.4% Black). Suffolk County is less Black than neighboring New Haven County (12.8% Black), Fairfield County (10.4% Black), and Hartford County (13.1% Black).

Suffolk County's Asian Population

65,019 residents of Suffolk County identify as Asian, or 4.3%. This makes the Asian share of the population of Suffolk County slightly less than the Asian share of the population of New York (9.5% Asian). Of the 62 counties in New York, Suffolk County is ranked #15 in terms of Asian residents as a share of the population.

Suffolk County is more Asian than neighboring Middlesex County (3% Asian), and New London County (4% Asian). Suffolk County is less Asian than neighboring Fairfield County (5.3% Asian), and Hartford County (5.9% Asian).

Suffolk County's Hispanic Population

332,959 residents of Suffolk County identify as Hispanic, or 21.8%. This makes the Hispanic share of the population of Suffolk County roughly similar to the Hispanic share of the population of New York (19.5% Hispanic). Of the 62 counties in New York, Suffolk County is ranked #6 in terms of Hispanic residents as a share of the population.

Suffolk County is more Hispanic than neighboring New Haven County (19.7% Hispanic), Middlesex County (7.3% Hispanic), Fairfield County (21.4% Hispanic), New London County (11.5% Hispanic), and Hartford County (18.5% Hispanic).

Suffolk County's Native American/Other Population

12,822 residents of Suffolk County identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other, or 0.8%. This makes the Native American/Other share of the population of Suffolk County roughly similar to the Native American/Other share of the population of New York (1.3% Native American/Other). Of the 62 counties in New York, Suffolk County is ranked #22 in terms of Native American/Other residents as a share of the population.

Suffolk County is more Native American/Other than neighboring Middlesex County (0.6% Native American/Other). Suffolk County is less Native American/Other than neighboring New Haven County (0.9% Native American/Other), Fairfield County (1.3% Native American/Other), and New London County (1.3% Native American/Other).

Suffolk County's Multiracial Population

40,522 residents of Suffolk County identify as Multiracial, or 2.7%. This makes the Multiracial share of the population of Suffolk County roughly similar to the Multiracial share of the population of New York (3.6% Multiracial). Of the 62 counties in New York, Suffolk County is ranked #58 in terms of Multiracial residents as a share of the population.

Suffolk County is less Multiracial than neighboring New Haven County (3.5% Multiracial), Middlesex County (3.9% Multiracial), Fairfield County (3.9% Multiracial), New London County (5.2% Multiracial), and Hartford County (3.5% Multiracial).

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