Suffolk County, NY Population

Overview

1.52 million

Total Population

41.7

Median age

50.50%

Female population %

98:100

Gender ratio (M:F)

55-59 years

Largest age group

51.6

Total dependency ratio

White

Largest racial group

302,968

Hispanic population

Sources: U.S. Census Bureau, American Community Survey (ACS) 2021

TABLE OF CONTENTS

Age

Suffolk County's population is old compared to the rest of the country:

The median age in Suffolk County is 41.7, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
Suffolk County's population under 18 was 21.16%, compared to the 22.51% nationwide.
Suffolk County's elderly or the senior population (over 65 age) was 16.92% as compared to 16.04% nationwide.
Of the total population in Suffolk County, 17.10% were under the age of 15, 19.10% aged 15 to 29, 46.88% aged 30 to 64, 14.62% aged 65 to 84, and 2.30% were 85 years of age and older.

There are 15,184 more females than males in Suffolk County:

The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 50.50% females and 49.50% males in Suffolk County, NY.
The Suffolk County, NY gender ratio is 98:100 i.e. 98 men to 100 women (0.980).
For male population, the largest age group is 55-59 years with a population of 59,891.
For the female population, the largest age group is 50-54 years with a population of 59,296.

Suffolk County's population has become increasingly diverse:

Racial distribution of Suffolk County population: 76.26% are White, 7.51% are Black or African American, 0.28% are American Indian and Alaska Native, 4.08% are Asian, 0.01% are Native Hawaiian and other Pacific Islander, 5.80% are some other race and 6.06% are multiracial.
Suffolk County's racial breakdown clearly shows that there is an absolute majority of White population in the county.
By ethnicity, 302,968 is Hispanic or Latino (of any race), and 1.22 million (80.11% of the total population) is Non-Hispanic.
The largest racial group in Suffolk County is White with a population of 1.16 million (76.26% of the total population).

Suffolk County's population has already reached its peak and is showing a trend of decline:

The peak population was 1,533,118 in the year 2021
From 2000 to 2010, Suffolk County's population increased by 70,799 (4.97%), as compared to the national growth of 9.63%.
From 2010 to 2020, Suffolk County's population increased by 27,613 (1.85%), according to Census Bureau's Population Estimates Program. For the same period, the rate of growth for the United States was 7.17%.
Between the year 2000 and 2022, Suffolk County's population was lowest in year 2000 at 1,423,538.