Long Island
Nassau County is home to 1,395,774 people in the Long Island region. Ocean beaches, the Hamptons, lighthouses, and North Fork vineyards east of the city.
How Nassau County works
County government does some local jobs, but not all of them. Cities, towns, villages, schools, and courts each keep their own work.
Nassau County keeps the county assessment roll and uses four property classes. A city or village may keep a second assessment roll and add another tax bill. The deed and paid-tax record are separate.
Most building permits in Nassau County start with the city, town, or village. County public health may join the job for a well, septic system, food business, or another health rule.
County offices are often the right place for health programs, benefits, family services, voting help, and emergency alerts. The office may be in another town, but it serves the whole county.
Ordinary example
The city, town, or village handles the building and zoning start. County public health may handle the septic work. The County Clerk keeps the deed, and the school district controls its own tax and enrollment line. The county name alone does not choose every office.
Property tax in Nassau County
Nassau County uses four property classes. The state's municipality dataset reports a computed blend across all four, so multiplying that blended rate by a home's value would not be a dependable residential estimate. Start with the parcel's class, assessment, and newest county, municipal, school, and village bills.
Who handles this here
New York divides everyday work among municipal, county, state, court, and City offices. This is the routing map. Confirm current forms, fees, hours, and deadlines on the official office page before acting.
Open the official Nassau County website ->County service directory
These links open the responsible county department, not a general homepage. A city, town, court, school district, or state agency may still own the final step.
County Clerk and land records
Nassau County ClerkDeeds, mortgages, recorded documents, copies, and the county's official records handoff.
Real property and tax maps
Nassau County Department of AssessmentCounty tax maps, parcel resources, and assessment support. Check whether the county or local assessor owns the roll. Nassau County owns the county assessment roll; a city or village assessment layer may still matter for its own taxes.
Elections and voter help
Nassau County Board of ElectionsRegistration, polling places, absentee or early-mail voting, and local election information.
Public health
Nassau County Department of HealthLocal public-health programs, environmental-health contacts, and current notices.
Social services
Nassau County Department of Social ServicesCounty-administered benefits, family services, adult services, and help finding the right program.
Emergency management and alerts
Nassau County Office of Emergency ManagementPreparedness, local emergency information, and the county's route to public alerts.
Official county pages reviewed 2026-07-13. Confirm current forms, fees, hours, and deadlines with the office before acting.
Probate, administration, and small estates
Nassau County Surrogate's CourtNew York Courts routes estate proceedings through the Surrogate's Court in the county of the person's domicile.
Driver and vehicle counter service
The serving DMV officeOffice ownership and available transactions vary. Use DMV's location finder before traveling, and check whether an appointment is expected.
Birth, death, marriage, and divorce records
The office that holds that event recordThe right owner depends on the event, date, and whether it happened in New York City. The records guide sorts those lanes first.
Confirm the current service arrangement on the responsible official page.
Local stories & notes
Short, sourced notes tied to this county, with the local color and the things worth knowing before you make a plan.
Cars & Driving
Long Beach residents should gather vehicle registration, residency proof, and fee information before trying to buy a city parking permit.
History & Culture
Levittown's fast-built postwar houses changed American suburbia, while its exclusionary beginnings and decades of alterations remain part of the address.
Cars & Driving
Hicksville station problems get easier to report when Town of Oyster Bay parking responsibilities are separated from LIRR station responsibilities.
Rules & Licenses
Oceanside Sanitary District No. 7 handles local collection details, while other property and government errands continue through Hempstead town or Nassau County.
History & Culture
Hempstead's village story runs from a 1643 settlement to early self-government, trading-center growth, and a very urban Nassau County feel.
Rules & Licenses
Franklin Square residents may use a special park district, but property, building, clerk, assessment, and tax work still follows Hempstead town and Nassau County.
History & Culture
Great Neck village's old center along Middle Neck Road explains why this small village still feels like a civic heart within a larger Great Neck.
History & Culture
Floral Park's local story is easy to miss until the village history ties the name, railroad-era growth, and civic identity together.
History & Culture
Massapequa Park gets its village identity from parks, recreation, and local-scale government close to the name on the map.
Official starting points
Start with the county website for departments and local services. Use ORPTS for assessor, equalization-rate, and municipal profile data. Exact forms and deadlines still come from the office that owns the work.
Use this carefully: The county website comes from New York State's locality directory. Follow any redirect and confirm the current department, form, deadline, and parcel-specific details before acting.
Tax rates: NYS Dept of Taxation & Finance (ORPTS), Real Property Tax Rates and Levy Data by Municipality, data.ny.gov dataset iq85-sdzs. (FY2025). Population: U.S. Census 2020.
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