By Patricia Jones Nassau County is one of the principal population, business and residential centres of Long Island. It occupies the western part of the island immediately east of New York City and includes densely developed suburbs, coastal villages, commercial districts, university campuses, healthcare centres and waterfront communities.
Mineola is the county seat and the main centre of county administration. Hempstead is the county’s largest population centre, while Garden City, Great Neck, Freeport, Hicksville, Levittown, Massapequa, Long Beach and Glen Cove are among its best-known communities.
The county has a layered form of local government. In addition to Nassau County government, residents may live within a city, town, incorporated village, school district, fire district or other special-purpose district. The exact agency responsible for a local service therefore depends on the property’s address.
Quick Overview of Nassau County
| Category | Details |
| State | New York |
| Region | Western Long Island |
| County seat | Mineola |
| Established | 1899 |
| Estimated population | 1,398,939 in 2025 |
| Land area | Approximately 285 square miles |
| Cities | Glen Cove and Long Beach |
| Towns | Hempstead, North Hempstead and Oyster Bay |
| Incorporated villages | 64 |
| Governing body | 19-member County Legislature |
| County executive | Bruce A. Blakeman |
| Presiding officer | Howard J. Kopel |
| Deputy presiding officer | Thomas McKevitt |
| Main court system | New York State courts in the 10th Judicial District |
| District administrative judge | Justice Vito M. DeStefano |
| Main public transport | Long Island Rail Road and NICE Bus |
| Major economic sectors | Healthcare, retail, professional services, finance, education, construction and hospitality |
Nassau County’s estimated population reached 1,398,939 in July 2025. The county contained approximately 480,591 housing units and 458,166 households. Its population density was more than 4,900 people per square mile at the 2020 Census, making it one of the most densely populated suburban counties in the United States.
Location and Geographic Structure
Nassau County occupies the western central portion of Long Island. Queens and New York City lie to the west, Suffolk County is to the east, Long Island Sound is to the north, and the Atlantic Ocean lies beyond the county’s southern barrier islands.
The North Shore is known for harbours, wooded areas, historic estates and communities along Long Island Sound. The South Shore contains flatter terrain, bays, canals, beaches and densely developed residential neighbourhoods. Central Nassau includes major retail areas, business corridors, hospitals, colleges and transport routes.
Important geographic areas include:
- The North Shore and Gold Coast communities
- Hempstead Plains and central Nassau
- South Shore waterfront communities
- Atlantic barrier islands
- Manhasset Bay
- Hempstead Harbor
- Great South Bay shoreline
- Jones Beach Island
- Oyster Bay and surrounding harbours
Major roads include the Long Island Expressway, Northern State Parkway, Southern State Parkway, Meadowbrook State Parkway, Wantagh State Parkway and Seaford–Oyster Bay Expressway.
The Long Island Rail Road is central to daily travel. Numerous stations connect Nassau communities with Manhattan, Brooklyn, Queens and Suffolk County. NICE Bus provides local and intercommunity bus services across much of the county.
Cities, Towns and Villages
Nassau County contains two cities, three towns, 64 incorporated villages and more than 100 unincorporated areas. The county is divided geographically among the cities of Glen Cove and Long Beach and the towns of Hempstead, North Hempstead and Oyster Bay.
Cities
- Glen Cove
- Long Beach
Towns
- Hempstead
- North Hempstead
- Oyster Bay
Prominent incorporated villages include:
- Atlantic Beach
- Cedarhurst
- East Rockaway
- Floral Park
- Freeport
- Garden City
- Great Neck
- Hempstead
- Lawrence
- Lynbrook
- Malverne
- Mineola
- New Hyde Park
- Rockville Centre
- Roslyn
- Sea Cliff
- Valley Stream
- Westbury
Large unincorporated communities include Baldwin, Bellmore, Bethpage, East Meadow, Elmont, Franklin Square, Hicksville, Levittown, Massapequa, Merrick, Oceanside, Plainview and Uniondale.
Cities, towns and villages may manage zoning, building permits, sanitation, roads, local parks and code enforcement. The county government is responsible for regional services such as policing in many communities, county roads, sewers, social services, public health, corrections and major parks.
Residents planning construction should contact their town, city or village because local municipalities generally administer building and zoning permits.
Population and Housing
Nassau County has a culturally and linguistically diverse population. Approximately 23.3% of residents are foreign-born, while 30.7% of people aged five or older speak a language other than English at home.
Around 20.6% of residents are under 18, and 20.5% are aged 65 or above. Approximately 19.4% of the population identifies as Hispanic or Latino, 15.6% as Asian and 13.9% as Black or African American.
Important housing and income figures for the 2020–2024 period include:
- Owner-occupied housing rate: 81.9%
- Median owner-occupied home value: $684,700
- Median gross monthly rent: $2,252
- Median monthly owner cost with a mortgage: $3,795
- Average household size: 2.99 people
- Median household income: $146,202
- Per-capita income: $64,198
- Persons living below the poverty line: 5.9%
- Average journey to work: 36 minutes
Housing ranges from apartments and compact suburban homes to waterfront properties and large North Shore estates. High land values, property taxes, limited undeveloped space and strong housing demand make affordability important throughout the county.
Economy and Employment
Nassau County has a large service-based economy closely connected with the wider New York metropolitan area. Many residents commute to New York City, but the county also contains major healthcare systems, colleges, professional firms, retail districts and local businesses.
Major economic sectors include:
- Healthcare and social assistance
- Professional and business services
- Finance and insurance
- Retail
- Construction
- Education
- Government
- Hospitality and food services
- Legal and accounting services
- Real estate
- Technology and communications
The county recorded 48,718 employer establishments and approximately 562,420 jobs in 2023. Annual payroll exceeded $38.18 billion. Retail sales reached almost $33 billion in 2022, while healthcare and social-assistance organisations generated approximately $21.9 billion in receipts or revenue.
Important economic and institutional assets include:
- Northwell Health facilities
- NYU Langone Hospital—Long Island
- Nassau University Medical Center
- Hofstra University
- Adelphi University
- Molloy University
- Nassau Community College
- Roosevelt Field
- Belmont Park
- Nassau Veterans Memorial Coliseum
- Long Island Rail Road corridors
- Downtown Mineola, Hempstead and Garden City
- Jones Beach and coastal tourism areas
Small businesses are especially important in downtown districts and village centres. Retail, restaurants, healthcare offices, construction companies, home-service providers and professional firms support employment across the county.
County Administration and Government
Nassau County operates under a county executive and legislative form of government. The county executive heads the executive branch, while the 19-member County Legislature drafts and approves local laws, budgets and county policies.
The Legislature was created in 1996. Each legislator represents one geographic district. Howard J. Kopel serves as presiding officer, Thomas McKevitt as deputy presiding officer and Michael Giangregorio as alternate deputy presiding officer. Delia DeRiggi-Whitton serves as minority leader.
The current legislators are:
- District 1: Scott Davis
- District 2: Viviana L. Russell
- District 3: Carrié Solages
- District 4: Patrick Mullaney
- District 5: Olena Nicks
- District 6: Debra Mulé
- District 7: Howard J. Kopel
- District 8: John J. Giuffrè
- District 9: Scott Strauss
- District 10: Mazi Melesa Pilip
- District 11: Delia DeRiggi-Whitton
- District 12: Michael Giangregorio
- District 13: Thomas McKevitt
- District 14: Cynthia Nuñez
- District 15: Kayla Knight
- District 16: Arnold W. Drucker
- District 17: Rose Marie Walker
- District 18: Samantha Goetz
- District 19: James Kennedy
The Legislature works through committees covering finance, public safety, public works, parks, health, social services, planning, economic development and government operations.
County Executive and Administrative Leadership
Bruce A. Blakeman serves as Nassau County Executive. He was first elected to the position in November 2021.
The county executive is the chief administrator of county government. The executive prepares the proposed budget, supervises executive departments, appoints commissioners with legislative approval and carries out laws adopted by the County Legislature.
Major responsibilities include:
- Preparing and administering the county budget
- Supervising county agencies
- Appointing department commissioners
- Managing public safety programmes
- Overseeing roads and infrastructure
- Administering parks and recreation
- Coordinating emergency responses
- Planning long-term county projects
- Signing or vetoing county legislation
- Working with towns, cities and villages
The executive branch includes departments responsible for assessment, consumer affairs, economic development, emergency management, health, human services, police, public works, parks and social services.
Other Important County Officials
Several major county offices are led by independently elected officials.
Important officials include:
- District Attorney: Anne T. Donnelly
- County Comptroller: Elaine Phillips
- County Clerk: Maureen O’Connell
- Sheriff: Anthony J. LaRocco
The district attorney investigates and prosecutes violations of state and local criminal law. The office has nearly 250 attorneys and a total staff of more than 450.
The comptroller serves as the county’s financial watchdog and audits departments, contracts and public spending. The county clerk maintains property records and serves as clerk of the Supreme and County Courts. The sheriff oversees corrections, civil enforcement, court orders, warrants and evictions.
Judiciary and Court System
Nassau County is part of New York’s 10th Judicial District. Justice Vito M. DeStefano serves as the administrative judge responsible for court administration in Nassau County.
The county’s court system includes:
- New York State Supreme Court
- Nassau County Court
- Nassau County District Court
- Family Court
- Surrogate’s Court
- City courts
- Town and village justice courts
Despite its name, the New York State Supreme Court is a trial-level court. It handles major civil disputes, matrimonial matters and other cases beyond the authority of lower courts.
County Court generally handles felony criminal cases. District Court hears misdemeanours, traffic matters, landlord-tenant disputes and lower-value civil claims. Family Court handles custody, child support, juvenile cases and family offences. Surrogate’s Court manages probate, estates, guardianships and adoption-related matters.
Most major court facilities are located around Old Country Road and County Seat Drive in Mineola.
Public Safety and Emergency Services
The Nassau County Police Department provides police services to many unincorporated communities and municipalities that do not operate independent departments. Glen Cove, Long Beach and several villages maintain their own police agencies.
The Nassau County Sheriff’s Department has a different role. It operates correctional services and carries out civil enforcement and court orders rather than serving as the main patrol agency for most neighbourhoods.
Public-safety organisations include:
- Nassau County Police Department
- Sheriff’s Department
- Office of Emergency Management
- District Attorney’s Office
- Probation Department
- Fire Marshal
- Volunteer fire departments
- Village and city police departments
- Emergency medical organisations
Fire protection is highly localised. Volunteer fire departments and fire districts serve most communities, while county agencies coordinate training, communications, investigations and large-scale emergency planning.
Infrastructure, Parks and Public Services
The Department of Public Works manages county roads, bridges, drainage structures, sewers, public buildings, grounds, engineering projects, fleet operations and county-owned real estate. Its principal functional areas are administration, engineering, operations, fleet management and real estate.
Other county services include:
- Public health
- Social services
- Senior assistance
- Veterans’ programmes
- Consumer protection
- Property assessment
- Emergency management
- Probation
- Community development
- Traffic management
- Sewer infrastructure
- Youth services
- Disability assistance
- Elections
- Public transport support
The Department of Parks, Recreation and Museums manages more than 70 parks, preserves, museums and recreational facilities. Major properties include Eisenhower Park, Cantiague Park, Wantagh Park, Christopher Morley Park, Nickerson Beach Park and several nature preserves and museums.
Frequently Asked Questions
Q1. What is the county seat of Nassau County?
A: Mineola is the county seat. The main executive and legislative offices are located in the Theodore Roosevelt Executive and Legislative Building at 1550 Franklin Avenue.
Q2. Is Nassau County part of New York City?
A: No. Nassau County is outside New York City, although it directly borders Queens. It is part of Long Island and the wider New York metropolitan region.
Q3. Who provides building permits in Nassau County?
A: Building and zoning permits are generally issued by the relevant city, town or incorporated village. Residents should identify their exact municipality before applying.
Q4. Which agency provides police services?
A: The Nassau County Police Department serves many communities, but Glen Cove, Long Beach and several villages operate their own police departments. The correct agency depends on the address.
Q5. Where are the main county government offices?
A: The principal executive and legislative offices are at 1550 Franklin Avenue in Mineola. The County Clerk, courts, assessment offices and other departments operate from separate buildings, so visitors should confirm the location before travelling.