4th most populous of 62
With 1,535,909 residents in 2024, Suffolk County ranks 4th by population among New York's 62 counties and is home to 7.7% of the state's residents.
Suffolk County is home to 1,535,909 people (2024 estimate) on 911 square miles of land. This page brings together official U.S. Census Bureau population estimates since 2000, the components of change—births, deaths and migration—American Community Survey indicators on income, housing, poverty and education, BEA economic accounts and BLS unemployment.
Key indicators
Population
1,535,909
July 1, 2024 estimate
2020 Census base
1,525,913
April 1, 2020
Change since 2020
+0.7%
2020–2024
Land area
911 mi²
2,359 km²
Population density
1,686.1 /mi²
2024 estimate ÷ land area
Births
16,207
Year to July 1, 2024
Deaths
12,813
Year to July 1, 2024
Natural change
+3,394
Births minus deaths, 2024
Net migration
+3,412
Domestic + international, 2024
Per capita personal income
$92,113
BEA, 2024
Gross domestic product
$139.0 billion
BEA, current dollars, 2024
Median household income
$130,686
ACS 2020–2024 5-year
Poverty rate
6.4%
ACS 2020–2024 5-year
Bachelor’s degree or higher
40.2%
Age 25+, ACS 2020–2024 5-year
Foreign-born residents
16.8%
ACS 2020–2024 5-year
Median home value
$578,400
ACS 2020–2024 5-year
Unemployment rate
3.4%
BLS annual average, 2024
Historical data
Pick an indicator to see its long-run evolution.
Population
2000–20241,535,909▲ 8%
U.S. Census Bureau: intercensal estimates 2000–2009, Vintage 2020 (2010–2019) and Vintage 2024 (2020–2024), July 1.
Data summary
| Indicator | Value | Year and source |
|---|---|---|
| Population estimate | 1,535,909 | 2024 · U.S. Census Bureau |
| Population, 2010 Census | 1,493,350 | 2010 · U.S. Census Bureau |
| Population, 2000 | 1,424,081 | July 1, 2000 · Census intercensal |
| Change since 2000 | +7.9% | 2000–2024 · Census |
| International migration | +9,881 | 2024 · Census Vintage 2024 |
| Domestic migration | −6,469 | 2024 · Census Vintage 2024 |
| Birth rate | 10.6 per 1,000 | 2024 · calculated |
| Death rate | 8.3 per 1,000 | 2024 · calculated |
| Population rank in New York | 4th of 62 | 2024 · calculated |
| Per capita personal income | $92,113 | BEA, 2024 · official |
| Gross domestic product | $139.0 billion | BEA, current dollars, 2024 · official |
| Median household income | $130,686 | ACS 2020–2024 5-year · official |
| Poverty rate | 6.4% | ACS 2020–2024 5-year · official |
| Bachelor’s degree or higher | 40.2% | Age 25+, ACS 2020–2024 5-year · official |
| Foreign-born residents | 16.8% | ACS 2020–2024 5-year · official |
| Median home value | $578,400 | ACS 2020–2024 5-year · official |
| Median gross rent | $2,255/month | ACS 2020–2024 5-year · official |
| Median age | 41.7 years | ACS 2020–2024 5-year · official |
| Households | 512,565 | ACS 2020–2024 5-year · official |
| Owner-occupied homes | 82.2% | ACS 2020–2024 5-year · official |
Suffolk County in context
Comparable indicators for Suffolk County, New York and the United States.
| Indicator | County | New York | U.S. | Reference |
|---|---|---|---|---|
| Population change 2020–2024 | +0.7% | −1.7% | +2.6% | Census Vintage 2024 |
| Birth rate (per 1,000) | 10.6 | 10.3 | 10.6 | 2024 |
| Death rate (per 1,000) | 8.3 | 8.1 | 9.1 | 2024 |
| Net migration rate (per 1,000) | 2.2 | 4.3 | 8.2 | 2024 |
| Population density (/mi²) | 1686.1 | 421.6 | 96.3 | 2024 |
| Per capita personal income | $92,113 | $85,552 | $73,204 | BEA, 2024 |
| Median household income | $130,686 | $85,974 | $80,734 | ACS 2020–2024 5-year |
| Poverty rate | 6.4% | 14.0% | 12.5% | ACS 2020–2024 5-year |
| Bachelor’s degree or higher | 40.2% | 40.2% | 35.7% | Age 25+, ACS 2020–2024 5-year |
| Foreign-born residents | 16.8% | 22.8% | 14.1% | ACS 2020–2024 5-year |
| Median home value | $578,400 | $423,800 | $332,700 | ACS 2020–2024 5-year |
| Median gross rent | $2,255/month | $1,621/month | $1,413/month | ACS 2020–2024 5-year |
| Median age | 41.7 years | 39.8 years | 38.9 years | ACS 2020–2024 5-year |
| Owner-occupied homes | 82.2% | 54.3% | 65.2% | ACS 2020–2024 5-year |
Did you know? Suffolk County
A quarter century of change
Its population went from 1,424,081 in 2000 to 1,535,909 in 2024, a change of +7.9%, compared with +4.6% for New York as a whole.
Births and deaths
In the year to July 2024 the county recorded 16,207 births and 12,813 deaths, so births outnumbered deaths by 3,394.
Record population
Annual Census estimates since 2000 put the county's highest population in 2024, at 1,535,909.
9th in density
Suffolk County has about 1686.1 residents per square mile of land, ranking 9th of 62 counties; New York averages 421.6.
Household income rank
With a median household income of $130,686 (ACS 2020–2024 5-year), the county ranks 2nd of 62 New York counties; the state median is $85,974.
Size of the economy
Its economy produced $139.0 billion of GDP in 2024 (BEA), 4th largest among 62 New York counties.
Latest economic growth
Real GDP grew 3.0% in 2024, adjusted for inflation (BEA, chained 2017 dollars).
Sources and methodology
- U.S. Census Bureau — County population totals and components, Vintage 2024
- U.S. Census Bureau — County estimates 2010–2020
- U.S. Census Bureau — Intercensal estimates 2000–2010
- U.S. Census Bureau — Gazetteer files (land area)
- U.S. Census Bureau — American Community Survey 2020–2024 5-year
- U.S. Bureau of Economic Analysis — Regional economic accounts
- U.S. Bureau of Labor Statistics — LAUS