New York, county records

Nassau County, New York Public Records

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Find the right office in Nassau County. Court cases, deeds and parcels, sheriff and jail records, vital records and county filings, each linked to the office that keeps them.

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Most requested Nassau County records

Every card below goes to the government office responsible for that record. Use the category buttons to narrow the list.

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Showing 11 official sources

Official

Police & jail

Nassau County Sheriff's Office

The Nassau County Sheriff's Office is the county's law enforcement agency and holds its arrest records, incident and accident reports and the roster of people held in the county jail.

nassaucountyny.gov
Open official site Nassau County Sheriff's Office
Official

City records

Nassau County Library

The Nassau County public library gives readers its catalogue, its online databases and the local history and genealogy collections it holds for the county.

nassaulibrary.org
Open official site Nassau County Library

Everything else, organized

More official Nassau County record sources

35 more Nassau County sources not listed above.

More county sources

Local record guide

About public records in Nassau County

County profile

Nassau County at a glance

State
New York
County seat
Mineola
Population
1,395,774
Area
453 sq mi
Founded
1899
Cities and towns
64

Nassau County offices and records

Sheriff & Law Enforcement. Nassau County Sheriff's Office is responsible for maintaining law and order within Nassau County's jurisdiction.

Police Departments. These agencies coordinate with the Sheriff's Office on major crimes and emergencies, making sure of full coverage and response across Nassau County.

Law Enforcement & Arrests. Nassau County Police Department (NCPD) is one of the largest police agencies in New York State, serving the unincorporated areas and most villages within Nassau County, with headquarters at 1490 Franklin Avenue in Mineola.

Criminal Records. These records are maintained by Nassau County Police Department, the Sheriff's Office, and the New York State Division of Criminal Justice Services. Residents can conduct background checks through the New York State Office of Court Administration, which provides statewide criminal history record searches for a fee.

Arrest Records. Arrest records in Nassau County are maintained by Nassau County Police Department and the Sheriff's Office.

Mugshots & Booking Photos. Mugshots in Nassau County are taken and retained by Nassau County Sheriff's Office during the booking process at Nassau County Correctional Center. These images are part of the arrest records and can be accessed through a formal request to the Sheriff's Office.

Elections in Nassau County are administered by Nassau County Board of Elections, located at 240 Old Country Road, Suite 450, Mineola, NY 11501 (phone: 516-571-2411, website: nassaucountyny.gov/1770/Board-of-Elections). Nassau County Department of Consumer Affairs (516-571-2600) licenses certain businesses including home improvement contractors, peddlers, and second-hand dealers. Property and land records in Nassau County are maintained by the County Clerk's office, which is the Register of Deeds, located at 240 Old Country Road, Mineola, NY 11501 (phone: 516-571-2664, website: nassaucountyny.gov/agencies/CountyClerk). Nassau County's court system includes multiple levels of jurisdiction. The Supreme Court of the State of New York, Nassau County, located at 100 Supreme Court Drive in Mineola (516-571-2905), handles major civil matters and felony criminal cases. Older records may require in-person research or assistance from county staff. Property tax assessment information is maintained separately by Nassau County Assessment Department at One West Street, Mineola, NY 11501 (516-571-3214). Nassau County Court, sharing facilities at the same complex, has jurisdiction over felonies and civil cases. Nassau County District Court, with locations throughout Nassau County including the main courthouse at 99 Main Street in Hempstead (516-572-2261), handles misdemeanors, traffic violations, and civil matters up to $25,000.

Abandoned mine records

Old mine workings in Nassau County

Where the workings are, and the office that holds the mine maps.

From the old mine records

What is on record in Nassau County

Old mine sites
5
Sites with no status in the records
3
Still producing
1
Main minerals
construction sand and gravel; Wollastonite
Holes drawn on the old survey maps
53
Shafts and tunnels
0
What they are
open pit mine or quarry, gravel pit, sand pit, sand and gravel pit
Maps surveyed
1947 to 1969
Sources
USGS mineral file and USGS topographic mine features

Is an old working under a property here?

The mine records hold 9 named mine sites inside the county, 5 of them worked out or abandoned; the old survey maps add 53 holes drawn inside the county, 0 of them shafts or tunnels. The minerals the records name are construction sand and gravel; Wollastonite.

A point in either file is a location, not a property line: the sheet shows the opening on the surface, not the rooms under it. The record that shows what runs under a parcel is the mine map. The OSMRE National Mine Map Repository holds scanned underground mine maps and answers requests for a named mine or an area. New York has no coal AML program; the DEC database covers permitted mines, not historic underground workings.

Nassau County: the boundary from the Census Bureau, and one dot for each old mine or hole on record inside it. The purple dots come off the old survey maps and the darkest of those are shafts and tunnels; the red, green and orange ones are mine records. Hover a dot for its name.
New York mine map and abandoned mine records
Named workings recorded in Nassau County (16 shown, 46 unnamed on the map)

Rows taken off the old survey maps open the USGS record of what sits at that spot, because no single feature on those maps has a page of its own. Rows from the mine records open their own USGS page.

Disclaimer: The mine information here is for general information only. Old mine records can be incomplete, outdated or wrong, and finding nothing here does not mean there is nothing there. Check with the mine map office named here before you rely on it, and have a qualified engineer look at any ground you are worried about. PublicRecordCenter.com assumes no responsibility or liability for any errors, omissions, or consequences arising from the use of this information.

Straight answers

Nassau County public-records FAQs

Open only the answer you need.

Where can I find mugshots or booking photos in Nassau County, New York?

Booking photos are kept by the agency that made the arrest, such as the Nassau County Sheriff or a city police department in Nassau County. Ask that agency for its record. Under New York Public Officers Law 89(2)(b)(viii), releasing law enforcement arrest or booking photographs is an unwarranted invasion of personal privacy unless public release will serve a specific law enforcement purpose and no state or federal law bars it.

How do I get a criminal background check in Nassau County, New York?

The New York criminal history record comes from the New York State Division of Criminal Justice Services (DCJS). Fingerprint based Record Review only: book an IdentoGO fingerprint appointment online or at 877-472-6915 with service code 15464Z (suppressed record) or 15465F (unsuppressed record); DCJS mails the rap sheet or a no record response. Fee: $17.50 (as of 2/2/2026) for New York residents fingerprinted at IdentoGO; $57.45 for those living outside New York State.

How can I look up sex offenders in Nassau County, New York?

Search the New York State Sex Offender Registry (DCJS), or every state at once on the National Sex Offender Public Website run by the U.S. Department of Justice.

How do I register to vote in Nassau County, New York?

Register with the county board of elections (Board of Elections in the City of New York) or through the New York State Board of Elections. You can also register online with the state online registration. For the November 3, 2026 general election, registration applications must be received by October 24, 2026.

How do I look up property records in Nassau County, New York?

Deeds and other recorded land documents in Nassau County are kept by the Nassau County clerk. Property values are set by the city, town or village assessor, and tax bills come from the town or city tax collector. Source: official state page.

How do I get a birth or death certificate in Nassau County, New York?

Certified birth and death certificates for New York come from the New York State Department of Health, Vital Records (all of the state except New York City). Birth and death records are also available from the local Registrar of Vital Statistics where the event occurred; New York City births and deaths come from the New York City Department of Health. By mail to New York State Department of Health, Vital Records Certification Unit, P.O. Box 2602, Albany, NY 12220-2602, or online or by phone through VitalChek Network, the independent company the Department has partnered with. Fee: $30 per copy by mail; $45 per copy online or by phone, plus a vendor processing fee per order.

How do I find business license records in Nassau County, New York?

Business entity filings are searched with the New York Department of State, Division of Corporations.

Same county

Cities, towns and neighboring counties

Use the city page when a record was created by a municipal police department or city office; use the county page for courts, deeds, vital records and jail custody.

HempsteadHempsteadLevittownFreeportHicksvilleValley StreamElmontEast MeadowLong BeachBaldwinUniondaleFranklin SquareOceansideGlen CovePlainviewRockville CentreGarden CityMassapequaMerrickMineolaWest HempsteadLynbrookRooseveltSyossetWantaghWoodmereBethpageMassapequa ParkPort WashingtonBellmoreFloral ParkSeafordWestburyJerichoWoodburyInwoodGreat NeckNew Hyde ParkEast RockawayMalverneBelleroseFairfield County, ConnecticutWestchester CountyQueens CountyBronx CountySuffolk County