Suffolk County GIS Maps
Suffolk County, New York, has 1,525,920 residents across 586,595 parcels and covers 911.8 square miles. The population grew 2.2% between the 2010 and 2020 census. More residents moved in than left over that decade. The FIPS code for Suffolk County is 36103.
Lindenhurst is the county's largest population center. Suffolk County also includes 108 zip codes, 69 public school districts and 13 municipalities. Those boundaries help explain why population, schools, and housing can look different from one part of the county to another. The map below shows how those county lines, zip codes, and school districts fit together, and the sections that follow use that same geography to show parcel data, population, demographics, school enrollment and housing patterns in more detail.
Maps, GIS layers, Parcels and sample data. Paid packages add full layers, analytics and database files.
Suffolk County Trends
- Population
- 1,525,920▴
- Median Home Value
- $539,500▴
- K-12 Enrollment
- 223,001▾
County analytics dashboards with historical trends & projections included in package downloads.
Free starter access previews county maps, lightweight GIS, and sample data. Paid packages unlock full GIS layers, analytics, and database files.
Suffolk County Maps
The maps below show a few of the county map styles included in our downloads. County packages include map exports in JPEG, PNG, SVG, PDF and GeoTIFF formats plus more than 20 GIS layers for mapping, research and analysis. Available layers include zip codes, area codes, subdivisions, school districts, political boundaries, roads, water features, points of interest and more.
County packages also include historical county demographics, business intelligence, analytical dashboards, AI-ready prompts, markdown files and related reference data. Everything is organized to save hours of manual work collecting current data, cleaning it and joining it together. That makes it easier to move faster on analytics, due diligence, business planning and location research. Paid packages are built for commercial use, but some package contents include source-specific attribution or notice guidance. Review Licensing & Data Source Notices.
Suffolk County Parcels
Suffolk County has 586,595 mapped parcels. The median assessed value is $3,925. The median lot size is 0.34 acres. 5,265 parcels are 10 acres or larger. The records carry 502,385 distinct owner names. About 2% of parcels list an owner mailing address outside New York. Owner names, site addresses, assessed values and lot sizes are on nearly every parcel. Mailing addresses reach 96.7%. Browse the interactive Suffolk County Parcel viewer here.
Suffolk County Parcel Data Coverage
| Field | Parcels | Coverage |
|---|---|---|
| Parcel ID | 586,595 | 100% |
| Owner name | 580,437 | 99.0% |
| Owner mailing address | 567,151 | 96.7% |
| Site address | 581,531 | 99.1% |
| Land use code | 580,660 | 99.0% |
| Land use description | 2,594 | 0.4% |
| Assessed value | 580,660 | 99.0% |
| Land value | 580,660 | 99.0% |
| Improvement value | 0 | 0% |
| Acreage | 580,181 | 98.9% |
| Parcel boundary | 586,595 | 100% |
| Download all Suffolk County parcels. | ||
Field coverage measured across all Suffolk County parcel records.
Suffolk County Population
Suffolk County had 1,525,920 residents in 2020. That was 2.2% higher than in 2010. Suffolk County added 106,551 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 1,674 people per square mile. Some of the county's most populated postal areas include Huntington Station, Bay Shore and Brentwood.
Population Trend in Suffolk County NY
Suffolk County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Suffolk County Zip Codes
Suffolk County has 108 zip codes. Some of the county's most populated zip codes include Huntington Station (11746), Bay Shore (11706) and Brentwood (11717). Huntington Station is the largest zip by population, with about 69,040 residents or 5% of the county total. Together, the three largest zips account for about 13% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Suffolk County NY
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 11746 | Huntington Station | 69,040 | ▴ 2.9% |
| 11706 | Bay Shore | 66,263 | ▴ 5.9% |
| 11717 | Brentwood | 62,193 | ▴ 2.4% |
| 11757 | Lindenhurst | 45,157 | ▾ -1.2% |
| 11772 | Patchogue | 44,459 | ▾ -0.8% |
| Download all zip code data | |||
Suffolk County Zip Code populations and trends per most recent census data.
Suffolk County Demographics
Suffolk County has a median age of 41.7, which makes the county a little older than New York overall. About 20.9% of residents are under 18, while 17.5% are 65 or older. That gives the county a fairly even mix of younger families and older adults. The largest age group is 25 to 44 at about 30.4% of the population, which points to a solid working-age base. About 39.9% of adults have a bachelor's degree or higher, above the statewide figure of 39.6%. The county has a more diverse population mix, with no single race or ethnicity accounting for all of the local story.
Key Demographics for Suffolk County NY
Median Age
41.7
Under 18
20.9%
Age 65+
17.5%
Bachelor's+
39.9%
Suffolk County School Districts
Suffolk County is served by 69 public school districts with 223,001 students enrolled in 2024. The largest districts on the county map are Brentwood Union Free, Sachem Central and Middle Country Central. Those three districts account for about 17% of public school enrollment in the map area. Total enrollment has stayed fairly steady in recent years, but it is slightly lower than it was in 2017.
Largest School Districts by Enrollment in Suffolk County NY
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Brentwood Union Free School District | 17,844 | 8% | ▾ -0.3% |
| Sachem Central School District | 11,556 | 5.2% | ▾ -0.3% |
| Middle Country Central School District | 9,410 | 4.2% | ▴ 0.5% |
| William Floyd Union Free School District | 9,386 | 4.2% | ▴ 1.9% |
| Longwood Central School District | 8,787 | 3.9% | — 0% |
| Download all school district data | |||
Suffolk County school district enrollment and trends per most recent NCES reporting data.
Suffolk County Housing & Real Estate
Suffolk County has a median home value of $539,500 and a median gross rent of $2,190. About 82% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run below the New York median, while rents come in above the state average. In March 2026, the median listing price was $993,750 and homes spent about 65 days on the market.
Suffolk County Housing Mix
Suffolk County housing mix: owner, renter and vacant units.
Suffolk County Housing Trends
Suffolk County median home value and rent trend (last 5 years).
Businesses in Suffolk County, NY
Suffolk County has 61,723 business listings across 1,290 categories. The largest categories in Suffolk County business listings are Real Estate Agents (1,320, 2.1%), Medical Offices (1,093, 1.8%), and Contractors (1,040, 1.7%). The full Suffolk County business listings dataset includes names, categories, addresses and contact details where available. Suffolk County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Suffolk County, NY
| Category | Businesses | Share |
|---|---|---|
| Real Estate Agents | 1,320 | 2.1% |
| Medical Offices | 1,093 | 1.8% |
| Contractors | 1,040 | 1.7% |
| Auto Repair | 922 | 1.5% |
| Churches & Religious Organizations | 800 | 1.3% |
| Gas Stations | 704 | 1.1% |
| Insurance Agencies | 696 | 1.1% |
| Beauty Salons | 664 | 1.1% |
| Hair Salons | 636 | 1.0% |
| Professional Services | 624 | 1.0% |
Suffolk County Business Listings
| Business | Category | City |
|---|---|---|
| Spectragraphic | 3D Printing Service | Commack |
| Buy Indasa | Abrasives Supplier | Lindenhurst |
| Quantum Rehabilitation & Nursing | Abuse And Addiction Treatment | Middle Island |
| Farmingdale State College Bookstore | Academic Bookstore | Farmingdale |
| Baya Bar - Acai & Smoothie Shop | Acai Bowls | Port Jefferson Station |
| Topping Rose House | Accommodation | Bridgehampton |
| Ambrosio & Bellotti, CPAs | Accountant | Huntington |
| Camp W Day Camp | Active Life | Melville |
| Integrative Family Acupuncture & Massage Therapy | Acupuncture | Smithtown |
| Addiction Treatment Huntington | Addiction Rehabilitation Center | Huntington |
| Download Suffolk County business listings | ||
Suffolk County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Suffolk County Basemaps
Suffolk County map and data packages include a set of useful basemaps to help you get started quickly. These include a custom light grey canvas, USGS topo, imagery and other reference layers that make it easier to build clear, meaningful county maps using the included GIS layers, your own data or both. Pre-rendered map tiles for the light grey basemap are included so you can use them offline or host them on your own CDN.
Get the Full Suffolk County Data Package
This page shows a preview of what's included in the Suffolk County data package. The full package gives you a ready-to-use county data system with GIS layers, historical data, maps, database files and planning tools that save hours of manual data gathering, cleanup and joins. Everything is organized to help you skip data wrangling and start analysis faster.
- 20+ GIS layers for parcels, zip codes, school districts, roads, water, boundaries and more
- Historical county demographics, housing, income and trend data
- ZIP code population files and school district enrollment history
- Database files, markdowns, AI-ready prompts and documentation
- Map exports in PNG, JPEG, PDF, SVG and GeoTIFF formats
- Offline-ready data explorer, map and analytics tools
Paid packages support commercial use, client work, and derived outputs. Some package contents may include source-specific attribution or provider notices. See Licensing & Data Source Notices.
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Nearby Counties
Browse county data pages for the counties that border Suffolk County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.