Suffolk County, New York Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 4th-largest in New York
The population of Suffolk County, New York is 1,525,680 as of the 2023 American Community Survey, making it the 4th-largest county in New York. The median household income is $128,329, the median home value is $539,500, and the median age is 41.7.
The population of Suffolk County has grown 2.8% since 2010 (1,494,337 → 1,535,909), a +0.20% annualized rate.
1,525,680
Population
+0.20%
Annual growth
1675
People / sq mi
$128,329
Median Income
$539,500
Median Home Value
Suffolk County covers 911 sq mi of land at 1674.9 people per square mile.
About Suffolk County, NY
Suffolk County is a county in New York with a population of 1,525,680. It ranks #4 among counties in New York by population. The median age is 41.7, older than the national median. The population is 49.6% male and 50.4% female.
The median household income in Suffolk County is $128,329, above the US median of $74,580. 4.0% of residents live below the federal poverty level. Home values sit at a median of $539,500, with monthly rent averaging $2,190. The homeownership rate of 81.9% is higher than the national rate of 64.8%.
Educational attainment in Suffolk County reflects 39.9% of adults 25 and older holding a bachelor's degree or higher, above the national average of 34.3%. Roughly 10.7% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 31.7 minutes each way.
Suffolk County Population History (2010-2024)
The county of Suffolk County had a population of 1,494,337 in 2010 and 1,535,909 in 2024, a 2.8% growth over 14 years. The peak was 1,535,909 in 2024. Average annual growth rate: 0.20%.
1,535,909
Population (2024)
1,494,337
Population (2010)
1,535,909
Peak (2024)
0.20%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 1,494,337 |
| 2011 | 1,498,910 |
| 2012 | 1,497,017 |
| 2013 | 1,497,389 |
| 2014 | 1,495,553 |
| 2015 | 1,491,997 |
| 2016 | 1,486,699 |
| 2017 | 1,483,862 |
| 2018 | 1,482,275 |
| 2019 | 1,478,325 |
| 2020 | 1,522,175 |
| 2021 | 1,534,053 |
| 2022 | 1,529,565 |
| 2023 | 1,529,029 |
| 2024 | 1,535,909 |
Race & Ethnicity
| White | 68.9% |
| Black or African American | 7.4% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.2% |
| Two or More Races | 0.0% |
Age & Sex
41.7
Median Age
50.4%
Female
49.6%
Male
17.5%
Age 65+
Age Distribution
Children (under 15): 16.9% · Seniors (65+): 17.5%
Income & Poverty
| Median household income | $128,329+$43,751 vs state |
| Mean household income | $163,151 |
| Per-capita income | $56,341 |
| Poverty rate | 4.0%-5.8% vs state |
| Unemployment rate | 3.0% |
| Employment-to-population | 62.8% |
Top Industries by Employment
The largest employment sector in Suffolk County is professional & business services, accounting for 28.6% of workers.
How residents commute
5.2%
Drive alone
1.3%
Carpool
73.4%
Public transit
10.7%
Work from home
31.7 min
Avg commute
Housing
$539,500+$136,500 vs state
Median home value
$2,190
Median rent
81.9%
Homeownership rate
579,790
Total housing units
88.4%
Occupied
11.6%
Vacant
18.1%
Renter-occupied
Social & access
95.4%
With health insurance
96.0%
With broadband internet
7.1%
Foreign-born
4.3%
Veterans (18+)
10.1%
With a disability
75.5%
Speak language other than English at home
Education
90.5%
High School+
39.9%
Bachelor's+
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Part of New York
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County rankings
Common questions about Suffolk County, NY
Frequently Asked Questions
Suffolk County, New York has a population of 1,525,680 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 4th-largest county in New York. Population density is 1675 people per square mile.
The population of Suffolk County has grown 2.8% since 2010 (1,494,337 → 1,535,909), a +0.20% annualized rate.
The median household income in Suffolk County, New York is $128,329, with mean (average) household income of $163,151 and per-capita income of $56,341. 4.0% of residents live below the federal poverty level.
In Suffolk County, the largest racial and ethnic groups are White (68.9%), Black or African American (7.4%), Hispanic or Latino (1.2%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Suffolk County, New York is 41.7 years. Residents are 50.4% female and 49.6% male.
The median home value in Suffolk County is $539,500 and median monthly rent is $2,190. 81.9% of occupied housing units are owner-occupied. The county has 579,790 total housing units, 11.6% of which are vacant.
The largest employment sector in Suffolk County, New York is professional, scientific, and management services, employing 28.6% of workers. The unemployment rate is 3.0%.
New York is among the largest cities associated with Suffolk County, New York, with a population of 8,516,202.
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.