Nassau County GIS Maps
Nassau County, New York, has 1,395,774 residents and covers 284.6 square miles. The population grew 4.2% between the 2010 and 2020 census. More residents moved in than left over that decade. The FIPS code for Nassau County is 36059.
Hempstead is the county's largest population center. Nassau County also includes 69 zip codes, 44 public school districts and 8 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 population, demographics, school enrollment and housing patterns in more detail.
Maps, GIS layers and sample data. Paid packages add full layers, analytics and database files.
Nassau County Trends
- Population
- 1,395,774▴
- Median Home Value
- $658,700▴
- K-12 Enrollment
- 160,527▾
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.
Nassau 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.
Nassau County Population
Nassau County had 1,395,774 residents in 2020. That was 4.2% higher than in 2010. Nassau County added 61,230 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 4,905 people per square mile. Some of the county's most populated postal areas include Hempstead, Massapequa and Westbury.
Population Trend in Nassau County NY
Nassau County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Nassau County Zip Codes
Nassau County has 69 zip codes. Some of the county's most populated zip codes include Hempstead (11550), Massapequa (11758) and Westbury (11590). Hempstead is the largest zip by population, with about 61,901 residents or 4% of the county total. Together, the three largest zips account for about 12% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Nassau County NY
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 11550 | Hempstead | 61,901 | ▴ 9.7% |
| 11758 | Massapequa | 54,226 | ▴ 0.8% |
| 11590 | Westbury | 47,838 | ▴ 4.5% |
| 11520 | Freeport | 45,121 | ▴ 4.1% |
| 11003 | Elmont | 43,979 | ▴ 6.3% |
| Download all zip code data | |||
Nassau County Zip Code populations and trends per most recent census data.
Nassau County Demographics
Nassau County has a median age of 41.8, which makes the county a little older than New York overall. About 21.6% of residents are under 18, while 18.2% 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 30.5% of the population, which points to a solid working-age base. About 48.7% 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 Nassau County NY
Median Age
41.8
Under 18
21.6%
Age 65+
18.2%
Bachelor's+
48.7%
Nassau County School Districts
Nassau County is served by 44 public school districts with 160,527 students enrolled in 2024. The largest districts on the county map are East Meadow Union Free, Levittown Union Free and Syosset Central. Those three districts account for about 14% 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 Nassau County NY
| District | Enrollment | Share | Trend |
|---|---|---|---|
| East Meadow Union Free School District | 7,793 | 4.9% | ▴ 0.6% |
| Levittown Union Free School District | 7,062 | 4.4% | ▾ -0.3% |
| Syosset Central School District | 6,980 | 4.3% | ▴ 0.2% |
| Great Neck Union Free School District | 6,798 | 4.2% | ▾ -0.2% |
| Massapequa Union Free School District | 6,461 | 4% | ▾ -0.3% |
| Download all school district data | |||
Nassau County school district enrollment and trends per most recent NCES reporting data.
Nassau County Housing & Real Estate
Nassau County has a median home value of $658,700 and a median gross rent of $2,195. About 82% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run above the New York median, while rents come in above the state average. In March 2026, the median listing price was $939,000 and homes spent about 53 days on the market.
Nassau County Housing Mix
Nassau County housing mix: owner, renter and vacant units.
Nassau County Housing Trends
Nassau County median home value and rent trend (last 5 years).
Businesses in Nassau County, NY
Nassau County has 53,197 business listings across 1,257 categories. The largest categories in Nassau County business listings are Real Estate Agents (1,306, 2.5%), Medical Offices (1,126, 2.1%), and Beauty Salons (732, 1.4%). The full Nassau County business listings dataset includes names, categories, addresses and contact details where available. Nassau County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Nassau County, NY
| Category | Businesses | Share |
|---|---|---|
| Real Estate Agents | 1,306 | 2.5% |
| Medical Offices | 1,126 | 2.1% |
| Beauty Salons | 732 | 1.4% |
| Dental Offices | 726 | 1.4% |
| Churches & Religious Organizations | 676 | 1.3% |
| Insurance Agencies | 652 | 1.2% |
| Auto Repair | 619 | 1.2% |
| Legal Services | 614 | 1.2% |
| Nail Salons | 612 | 1.2% |
| Hair Salons | 605 | 1.1% |
Nassau County Business Listings
| Business | Category | City |
|---|---|---|
| SHIRTICAP® | EMBROIDERY | SCREEN PRINTER | WEB DESIGN | 3D Printing Service | Baldwin |
| Conrad Blasius Equipment & Supplies, Inc. | Abrasives Supplier | Plainview |
| Transitions of Long Island | Abuse And Addiction Treatment | North Hempstead |
| Molloy College Bookstore - Wilbur Arts Building | Academic Bookstore | Rockville Centre |
| Bango | Acai Bowls | Garden City |
| The Allure Mineola | Accommodation | Mineola |
| Alfonso J. Mollica CPA PC | Accountant | Levittown |
| Future Stars | Active Life | Syosset |
| Golden Tiger Acupuncture and Chinese Herbal Therapy | Acupuncture | Rockville Centre |
| Victory Recovery Partners | Addiction Rehabilitation Center | Hempstead |
| Download Nassau County business listings | ||
Nassau County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Nassau County Basemaps
Nassau 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 Nassau County Data Package
This page shows a preview of what's included in the Nassau 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 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.
One-time · instant download · 30-day refund guarantee · See full package details
Preview a Live Package Demo
See exactly what is included in a county data package. Inspect how files are organized, the interactive data explorer and how maps and analytics are laid out. The demo loads a real sample package from New York — explore the full structure before you buy.
No email or download required. Opens in a preview window on this page.
Nearby Counties
Browse county data pages for the counties that border Nassau County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.