About this dataset

Context

The dataset tabulates the Suffolk County population over the last 20 plus years. It lists the population for each year, along with the year on year change in population, as well as the change in percentage terms for each year. The dataset can be utilized to understand the population change of Suffolk County across the last two decades. For example, using this dataset, we can identify if the population is declining or increasing. If there is a change, when the population peaked, or if it is still growing and has not reached its peak. We can also compare the trend with the overall trend of United States population over the same period of time.

Key observations

In 2023, the population of Suffolk County was 1.52 million, a 0.31% decrease year-by-year from 2022. Previously, in 2022, Suffolk County population was 1.53 million, a decline of 0.38% compared to a population of 1.53 million in 2021. Over the last 20 plus years, between 2000 and 2023, population of Suffolk County increased by 99,632. In this period, the peak population was 1.53 million in the year 2021. The numbers suggest that the population has already reached its peak and is showing a trend of decline. Source: U.S. Census Bureau Population Estimates Program (PEP).

Content

When available, the data consists of estimates from the U.S. Census Bureau Population Estimates Program (PEP).

Data Coverage:

• From 2000 to 2023

Variables / Data Columns

• Year: This column displays the data year (Measured annually and for years 2000 to 2023)
• Population: The population for the specific year for the Suffolk County is shown in this column.
• Year on Year Change: This column displays the change in Suffolk County population for each year compared to the previous year.
• Change in Percent: This column displays the year on year change as a percentage. Please note that the sum of all percentages may not equal one due to rounding of values.

Good to know

Margin of Error

Data in the dataset are based on the estimates and are subject to sampling variability and thus a margin of error. Neilsberg Research recommends using caution when presening these estimates in your research.

Custom data

If you do need custom data for any of your research project, report or presentation, you can contact our research staff at research@neilsberg.com for a feasibility of a custom tabulation on a fee-for-service basis.

Inspiration

Neilsberg Research Team curates, analyze and publishes demographics and economic data from a variety of public and proprietary sources, each of which often includes multiple surveys and programs. The large majority of Neilsberg Research aggregated datasets and insights is made available for free download at https://www.neilsberg.com/research/.

Recommended for further research

This dataset is a part of the main dataset for Suffolk County Population by Year. You can refer the same here

Graph and download economic data for Resident Population in Suffolk County, NY (NYSUFF0POP) from 1970 to 2024 about Suffolk County, NY; New York; NY; residents; population; and USA.

Comprehensive demographic dataset for Suffolk County, NY, US including population statistics, household income, housing units, education levels, employment data, and transportation with year-over-year changes.

About this dataset

Context

The dataset tabulates the population of Suffolk County by race. It includes the population of Suffolk County across racial categories (excluding ethnicity) as identified by the Census Bureau. The dataset can be utilized to understand the population distribution of Suffolk County across relevant racial categories.

Key observations

The percent distribution of Suffolk County population by race (across all racial categories recognized by the U.S. Census Bureau): 68.89% are white, 7.42% are Black or African American, 0.40% are American Indian and Alaska Native, 4.31% are Asian, 0.02% are Native Hawaiian and other Pacific Islander, 8.84% are some other race and 10.13% are multiracial.

Content

When available, the data consists of estimates from the U.S. Census Bureau American Community Survey (ACS) 2019-2023 5-Year Estimates.

Racial categories include:

• White
• Black or African American
• American Indian and Alaska Native
• Asian
• Native Hawaiian and Other Pacific Islander
• Some other race
• Two or more races (multiracial)

Variables / Data Columns

• Race: This column displays the racial categories (excluding ethnicity) for the Suffolk County
• Population: The population of the racial category (excluding ethnicity) in the Suffolk County is shown in this column.
• % of Total Population: This column displays the percentage distribution of each race as a proportion of Suffolk County total population. Please note that the sum of all percentages may not equal one due to rounding of values.

Good to know

Margin of Error

Data in the dataset are based on the estimates and are subject to sampling variability and thus a margin of error. Neilsberg Research recommends using caution when presening these estimates in your research.

Custom data

If you do need custom data for any of your research project, report or presentation, you can contact our research staff at research@neilsberg.com for a feasibility of a custom tabulation on a fee-for-service basis.

Inspiration

Neilsberg Research Team curates, analyze and publishes demographics and economic data from a variety of public and proprietary sources, each of which often includes multiple surveys and programs. The large majority of Neilsberg Research aggregated datasets and insights is made available for free download at https://www.neilsberg.com/research/.

Recommended for further research

This dataset is a part of the main dataset for Suffolk County Population by Race & Ethnicity. You can refer the same here

Graph and download economic data for Percent of Population Below the Poverty Level (5-year estimate) in Suffolk County, NY (S1701ACS036103) from 2012 to 2023 about Suffolk County, NY; New York; NY; poverty; percent; 5-year; population; and USA.

Graph and download economic data for Estimate of Median Household Income for Suffolk County, NY (MHINY36103A052NCEN) from 1989 to 2023 about Suffolk County, NY; New York; NY; households; median; income; and USA.

About this dataset

Context

The dataset tabulates the population of Suffolk County by gender across 18 age groups. It lists the male and female population in each age group along with the gender ratio for Suffolk County. The dataset can be utilized to understand the population distribution of Suffolk County by gender and age. For example, using this dataset, we can identify the largest age group for both Men and Women in Suffolk County. Additionally, it can be used to see how the gender ratio changes from birth to senior most age group and male to female ratio across each age group for Suffolk County.

Key observations

Largest age group (population): Male # 55-59 years (60,060) | Female # 55-59 years (58,558). Source: U.S. Census Bureau American Community Survey (ACS) 2018-2022 5-Year Estimates.

Content

When available, the data consists of estimates from the U.S. Census Bureau American Community Survey (ACS) 2018-2022 5-Year Estimates.

Age groups:

• Under 5 years
• 5 to 9 years
• 10 to 14 years
• 15 to 19 years
• 20 to 24 years
• 25 to 29 years
• 30 to 34 years
• 35 to 39 years
• 40 to 44 years
• 45 to 49 years
• 50 to 54 years
• 55 to 59 years
• 60 to 64 years
• 65 to 69 years
• 70 to 74 years
• 75 to 79 years
• 80 to 84 years
• 85 years and over

Scope of gender :

Please note that American Community Survey asks a question about the respondents current sex, but not about gender, sexual orientation, or sex at birth. The question is intended to capture data for biological sex, not gender. Respondents are supposed to respond with the answer as either of Male or Female. Our research and this dataset mirrors the data reported as Male and Female for gender distribution analysis.

Variables / Data Columns

• Age Group: This column displays the age group for the Suffolk County population analysis. Total expected values are 18 and are define above in the age groups section.
• Population (Male): The male population in the Suffolk County is shown in the following column.
• Population (Female): The female population in the Suffolk County is shown in the following column.
• Gender Ratio: Also known as the sex ratio, this column displays the number of males per 100 females in Suffolk County for each age group.

Good to know

Margin of Error

Data in the dataset are based on the estimates and are subject to sampling variability and thus a margin of error. Neilsberg Research recommends using caution when presening these estimates in your research.

Custom data

If you do need custom data for any of your research project, report or presentation, you can contact our research staff at research@neilsberg.com for a feasibility of a custom tabulation on a fee-for-service basis.

Inspiration

Neilsberg Research Team curates, analyze and publishes demographics and economic data from a variety of public and proprietary sources, each of which often includes multiple surveys and programs. The large majority of Neilsberg Research aggregated datasets and insights is made available for free download at https://www.neilsberg.com/research/.

Recommended for further research

This dataset is a part of the main dataset for Suffolk County Population by Gender. You can refer the same here

About this dataset

Context

The dataset tabulates the data for the Suffolk County, NY population pyramid, which represents the Suffolk County population distribution across age and gender, using estimates from the U.S. Census Bureau American Community Survey (ACS) 2019-2023 5-Year Estimates. It lists the male and female population for each age group, along with the total population for those age groups. Higher numbers at the bottom of the table suggest population growth, whereas higher numbers at the top indicate declining birth rates. Furthermore, the dataset can be utilized to understand the youth dependency ratio, old-age dependency ratio, total dependency ratio, and potential support ratio.

Key observations

• Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Suffolk County, NY, is 25.9.
• Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Suffolk County, NY, is 26.6.
• Total dependency ratio for Suffolk County, NY is 52.5.
• Potential support ratio, which is the number of youth (working age population) per elderly, for Suffolk County, NY is 3.8.

Content

When available, the data consists of estimates from the U.S. Census Bureau American Community Survey (ACS) 2019-2023 5-Year Estimates.

Age groups:

• Under 5 years
• 5 to 9 years
• 10 to 14 years
• 15 to 19 years
• 20 to 24 years
• 25 to 29 years
• 30 to 34 years
• 35 to 39 years
• 40 to 44 years
• 45 to 49 years
• 50 to 54 years
• 55 to 59 years
• 60 to 64 years
• 65 to 69 years
• 70 to 74 years
• 75 to 79 years
• 80 to 84 years
• 85 years and over

Variables / Data Columns

• Age Group: This column displays the age group for the Suffolk County population analysis. Total expected values are 18 and are define above in the age groups section.
• Population (Male): The male population in the Suffolk County for the selected age group is shown in the following column.
• Population (Female): The female population in the Suffolk County for the selected age group is shown in the following column.
• Total Population: The total population of the Suffolk County for the selected age group is shown in the following column.

Good to know

Margin of Error

Data in the dataset are based on the estimates and are subject to sampling variability and thus a margin of error. Neilsberg Research recommends using caution when presening these estimates in your research.

Custom data

If you do need custom data for any of your research project, report or presentation, you can contact our research staff at research@neilsberg.com for a feasibility of a custom tabulation on a fee-for-service basis.

Inspiration

Neilsberg Research Team curates, analyze and publishes demographics and economic data from a variety of public and proprietary sources, each of which often includes multiple surveys and programs. The large majority of Neilsberg Research aggregated datasets and insights is made available for free download at https://www.neilsberg.com/research/.

Recommended for further research

This dataset is a part of the main dataset for Suffolk County Population by Age. You can refer the same here

Resident Population in Suffolk County, NY was 1535.90900 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Suffolk County, NY reached a record high of 1535.90900 in January of 2024 and a record low of 1127.03000 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Suffolk County, NY - last updated from the United States Federal Reserve on December of 2025.

Graph and download economic data for Estimate, Median Age by Sex, Total Population (5-year estimate) in Suffolk County, NY (B01002001E036103) from 2009 to 2023 about Suffolk County, NY; age; New York; NY; 5-year; median; and USA.

This resource is a member of a series. The TIGER/Line shapefiles and related database files (.dbf) are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) System (MTS). The MTS represents a seamless national file with no overlaps or gaps between parts, however, each TIGER/Line shapefile is designed to stand alone as an independent data set, or they can be combined to cover the entire nation. The All Roads shapefile includes all features within the MTS Super Class "Road/Path Features" distinguished where the MAF/TIGER Feature Classification Code (MTFCC) for the feature in the MTS that begins with "S". This includes all primary, secondary, local neighborhood, and rural roads, city streets, vehicular trails (4wd), ramps, service drives, alleys, parking lot roads, private roads for service vehicles (logging, oil fields, ranches, etc.), bike paths or trails, bridle/horse paths, walkways/pedestrian trails, and stairways.

Population Estimate, Total, Hispanic or Latino (5-year estimate) in Suffolk County, NY was 338930.00000 Persons in January of 2023, according to the United States Federal Reserve. Historically, Population Estimate, Total, Hispanic or Latino (5-year estimate) in Suffolk County, NY reached a record high of 338930.00000 in January of 2023 and a record low of 198965.00000 in January of 2009. Trading Economics provides the current actual value, an historical data chart and related indicators for Population Estimate, Total, Hispanic or Latino (5-year estimate) in Suffolk County, NY - last updated from the United States Federal Reserve on November of 2025.

Graph and download economic data for Population Estimate, Total, Hispanic or Latino (5-year estimate) in Suffolk County, NY (B03002012E036103) from 2009 to 2023 about Suffolk County, NY; latino; hispanic; New York; estimate; NY; 5-year; persons; population; and USA.

About this dataset

Context

The dataset tabulates the Suffolk County population by age. The dataset can be utilized to understand the age distribution and demographics of Suffolk County.

Content

The dataset constitues the following three datasets

• Suffolk County, NY Age Group Population Dataset: A complete breakdown of Suffolk County age demographics from 0 to 85 years, distributed across 18 age groups
• Suffolk County, NY Age Cohorts Dataset: Children, Working Adults, and Seniors in Suffolk County - Population and Percentage Analysis
• Suffolk County, NY Population Pyramid Dataset: Age Groups, Male and Female Population, and Total Population for Demographics Analysis

Good to know

Margin of Error

Data in the dataset are based on the estimates and are subject to sampling variability and thus a margin of error. Neilsberg Research recommends using caution when presening these estimates in your research.

Custom data

If you do need custom data for any of your research project, report or presentation, you can contact our research staff at research@neilsberg.com for a feasibility of a custom tabulation on a fee-for-service basis.

Inspiration

Neilsberg Research Team curates, analyze and publishes demographics and economic data from a variety of public and proprietary sources, each of which often includes multiple surveys and programs. The large majority of Neilsberg Research aggregated datasets and insights is made available for free download at https://www.neilsberg.com/research/.

Population Estimate, Total, Not Hispanic or Latino, White Alone (5-year estimate) in Suffolk County, NY was 963469.00000 Persons in January of 2023, according to the United States Federal Reserve. Historically, Population Estimate, Total, Not Hispanic or Latino, White Alone (5-year estimate) in Suffolk County, NY reached a record high of 1136925.00000 in January of 2009 and a record low of 963469.00000 in January of 2023. Trading Economics provides the current actual value, an historical data chart and related indicators for Population Estimate, Total, Not Hispanic or Latino, White Alone (5-year estimate) in Suffolk County, NY - last updated from the United States Federal Reserve on December of 2025.

This feature class was created by exporting the CDP polygon features from the 2020 Census Designated Place State-based shapefile.The Current Place State-based shapefile contains a record for incorporated places, which are established to provide governmental functions for a concentration of people as opposed to a minor civil division (MCD), which generally is created to provide services or administer an area without regard, necessarily, to population. Places always nest within a state, but may extend across county and county subdivision boundaries. An incorporated place usually is a city, town, village, or borough, but can have other legal descriptions. CDPs are delineated for the decennial census as the statistical counterparts of incorporated places. CDPs are delineated to provide data for settled concentrations of population that are identifiable by name, but are not legally incorporated under the laws of the state in which they are located

Population Estimate, Total, Not Hispanic or Latino, Asian Alone (5-year estimate) in Suffolk County, NY was 64434.00000 Persons in January of 2023, according to the United States Federal Reserve. Historically, Population Estimate, Total, Not Hispanic or Latino, Asian Alone (5-year estimate) in Suffolk County, NY reached a record high of 64434.00000 in January of 2023 and a record low of 50178.00000 in January of 2010. Trading Economics provides the current actual value, an historical data chart and related indicators for Population Estimate, Total, Not Hispanic or Latino, Asian Alone (5-year estimate) in Suffolk County, NY - last updated from the United States Federal Reserve on November of 2025.

The TIGER/Line shapefiles and related database files (.dbf) are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) Database (MTDB). The MTDB represents a seamless national file with no overlaps or gaps between parts, however, each TIGER/Line shapefile is designed to stand alone as an independent data set, or they can be combined to cover the entire nation. The Address Ranges Feature Shapefile (ADDRFEAT.dbf) contains the geospatial edge geometry and attributes of all unsuppressed address ranges for a county or county equivalent area. The term "address range" refers to the collection of all possible structure numbers from the first structure number to the last structure number and all numbers of a specified parity in between along an edge side relative to the direction in which the edge is coded. Single-address address ranges have been suppressed to maintain the confidentiality of the addresses they describe. Multiple coincident address range feature edge records are represented in the shapefile if more than one left or right address ranges are associated to the edge. The ADDRFEAT shapefile contains a record for each address range to street name combination. Address range associated to more than one street name are also represented by multiple coincident address range feature edge records. Note that the ADDRFEAT shapefile includes all unsuppressed address ranges compared to the All Lines Shapefile (EDGES.shp) which only includes the most inclusive address range associated with each side of a street edge. The TIGER/Line shapefile contain potential address ranges, not individual addresses. The address ranges in the TIGER/Line Files are potential ranges that include the full range of possible structure numbers even though the actual structures may not exist.

Suffolk County, NY has a B wealth grade. Median household income: $129,210. Unemployment rate: 4.6%. Income grows 5.3% yearly.

About this dataset

Context

The dataset tabulates the Suffolk County population distribution across 18 age groups. It lists the population in each age group along with the percentage population relative of the total population for Suffolk County. The dataset can be utilized to understand the population distribution of Suffolk County by age. For example, using this dataset, we can identify the largest age group in Suffolk County.

Key observations

The largest age group in Suffolk County, NY was for the group of age 55-59 years with a population of 118,648 (7.79%), according to the 2021 American Community Survey. At the same time, the smallest age group in Suffolk County, NY was the 80-84 years with a population of 29,039 (1.91%). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

Content

When available, the data consists of estimates from the U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

Age groups:

• Under 5 years
• 5 to 9 years
• 10 to 14 years
• 15 to 19 years
• 20 to 24 years
• 25 to 29 years
• 30 to 34 years
• 35 to 39 years
• 40 to 44 years
• 45 to 49 years
• 50 to 54 years
• 55 to 59 years
• 60 to 64 years
• 65 to 69 years
• 70 to 74 years
• 75 to 79 years
• 80 to 84 years
• 85 years and over

Variables / Data Columns

• Age Group: This column displays the age group in consideration
• Population: The population for the specific age group in the Suffolk County is shown in this column.
• % of Total Population: This column displays the population of each age group as a proportion of Suffolk County total population. Please note that the sum of all percentages may not equal one due to rounding of values.

Good to know

Margin of Error

Data in the dataset are based on the estimates and are subject to sampling variability and thus a margin of error. Neilsberg Research recommends using caution when presening these estimates in your research.

Custom data

If you do need custom data for any of your research project, report or presentation, you can contact our research staff at research@neilsberg.com for a feasibility of a custom tabulation on a fee-for-service basis.

Inspiration

Neilsberg Research Team curates, analyze and publishes demographics and economic data from a variety of public and proprietary sources, each of which often includes multiple surveys and programs. The large majority of Neilsberg Research aggregated datasets and insights is made available for free download at https://www.neilsberg.com/research/.

Recommended for further research

This dataset is a part of the main dataset for Suffolk County Population by Age. You can refer the same here