Suffolk County Demographics

A map of Suffolk County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	948,898	967,330	62.0%	63.4%
Hispanic	348,579	332,959	22.8%	21.8%
Black	106,126	107,268	6.9%	7.0%
Asian	67,617	65,019	4.4%	4.3%
Multiracial	45,561	40,522	3.0%	2.7%
Native American/Other	13,365	12,822	0.9%	0.8%

Suffolk County, New York has an estimated population of 1,530,146, a less than 1% change from the 1,525,920 recorded in the 2020 Census. The population is 62.0% White, 22.8% Hispanic, 6.9% Black, 4.4% Asian, 3.0% Multiracial, and 0.9% Native American/Other. This demographic dot map shows the population of Suffolk County, with one dot drawn for each person counted by the Census, color-coded by race.

Suffolk has become more racially diverse since the 2020 Census. It is considerably less diverse than New York overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Suffolk County, that probability was 54.3% in 2020 and 55.6% in the most recent ACS estimates.

Suffolk County is ranked the 4th most populous county in New York, out of 62 counties. Suffolk County was ranked the 4th most populous county in the 2020 Census.

Suffolk County's White Population

948,898 residents of Suffolk County, or 62.0% of the population, identify as White. The share of White residents in Suffolk County is higher than in New York overall, where 52.8% of the population is White. Suffolk County ranks 53rd statewide in terms of White residents as a share of the population, out of 62 counties.

Since the 2020 Census, Suffolk County's White population has declined by an estimated 1.9%. White residents' share of Suffolk County's population has decreased from 63.4% to 62.0%.

Suffolk County is more White than neighboring Nassau County (54.3% White), Westchester County (49.2% White), and Bronx County (8.7% White). Suffolk County is less White than neighboring Washington County (88.9% White), and Putnam County (70.9% White).

Suffolk County's Black Population

106,126 residents of Suffolk County, or 6.9% of the population, identify as Black. The share of Black residents in Suffolk County is lower than in New York overall, where 13.4% of the population is Black. Suffolk County ranks 19th statewide in terms of Black residents as a share of the population, out of 62 counties.

Since the 2020 Census, Suffolk County's Black population has declined by an estimated 1.1%. Black residents' share of Suffolk County's population has remained roughly unchanged at 6.9%.

Suffolk County is more Black than neighboring Washington County (1.2% Black), and Putnam County (2.8% Black). Suffolk County is less Black than neighboring Nassau County (10.8% Black), Westchester County (12.7% Black), and Bronx County (28.7% Black).

Suffolk County's Asian Population

67,617 residents of Suffolk County, or 4.4% of the population, identify as Asian. The share of Asian residents in Suffolk County is slightly lower than in New York overall, where 9% of the population is Asian. Suffolk County ranks 15th statewide in terms of Asian residents as a share of the population, out of 62 counties.

Since the 2020 Census, Suffolk County's Asian population has grown by an estimated 4.0%. Asian residents' share of Suffolk County's population has remained roughly unchanged at 4.4%.

Suffolk County is more Asian than neighboring Washington County (2.1% Asian), Putnam County (2.3% Asian), and Bronx County (4% Asian). Suffolk County is less Asian than neighboring Nassau County (12.2% Asian), and Westchester County (6.2% Asian).

Suffolk County's Hispanic Population

348,579 residents of Suffolk County, or 22.8% of the population, identify as Hispanic. The share of Hispanic residents in Suffolk County is slightly higher than in New York overall, where 19.8% of the population is Hispanic. Suffolk County ranks 6th statewide in terms of Hispanic residents as a share of the population, out of 62 counties.

Since the 2020 Census, Suffolk County's Hispanic population has grown by an estimated 4.7%. Hispanic residents' share of Suffolk County's population has increased from 21.8% to 22.8%.

Suffolk County is more Hispanic than neighboring Nassau County (18.7% Hispanic), Washington County (3.8% Hispanic), and Putnam County (20% Hispanic). Suffolk County is less Hispanic than neighboring Westchester County (27.4% Hispanic), and Bronx County (55.1% Hispanic).

Suffolk County's Native American/Other Population

13,365 residents of Suffolk County, or 0.9% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Suffolk County is comparable to the share in New York overall, where 1.2% of the population is Native American/Other. Suffolk County ranks 22nd statewide in terms of Native American/Other residents as a share of the population, out of 62 counties.

Since the 2020 Census, Suffolk County's Native American/Other population has grown by an estimated 4.2%. Native American/Other residents' share of Suffolk County's population has remained roughly unchanged at 0.9%.

Suffolk County is more Native American/Other than neighboring Washington County (0.6% Native American/Other). Suffolk County is less Native American/Other than neighboring Nassau County (1.1% Native American/Other), Westchester County (1.3% Native American/Other), Putnam County (1% Native American/Other), and Bronx County (1.3% Native American/Other).

Suffolk County's Multiracial Population

45,561 residents of Suffolk County, or 3.0% of the population, identify as Multiracial. The share of Multiracial residents in Suffolk County is comparable to the share in New York overall, where 3.8% of the population is Multiracial. Suffolk County ranks 58th statewide in terms of Multiracial residents as a share of the population, out of 62 counties.

Since the 2020 Census, Suffolk County's Multiracial population has grown by an estimated 12.4%. Multiracial residents' share of Suffolk County's population has remained roughly unchanged at 3.0%.

Suffolk County is more Multiracial than neighboring Bronx County (2.2% Multiracial). Suffolk County is less Multiracial than neighboring Westchester County (3.3% Multiracial), and Washington County (3.4% Multiracial).

Sources: Most recent population estimates are from the 2020-2024 American Community Survey 5-Year Estimates. 2020 population counts and map data are from 2020 Census State Redistricting Data. Geographic data are from Census TIGER/Line Shapefiles.