SearchSystems Editorial

Reviewed and updated October 4, 2026 by the SearchSystems.net editorial team. Every office link on this page was opened and checked against the office's own website at review time.

About this guide

Nassau County is a county in New York with about 1.4 million residents (2024 Census Bureau estimate). Its public records are not in one place: court cases, jail bookings, deeds, property values, vital records and records requests each belong to a different office. This guide names the office that holds each kind of record, links to its own website and gives the phone number and address where the office publishes them. SearchSystems verified 6 county office pages for Nassau County, every one opened and checked, and lists 1 more whose site blocks automated checks.

In this guide: Where the records live, Jail and arrests, Court records, County Clerk, Deeds and property, Vital records, District Attorney, Records requests, Statewide sources, More directory links, Cities and towns, Other counties and Questions.

Where Nassau County public records live

Each kind of Nassau County record is kept by a different office. The list below names the office SearchSystems verified for each one; the sections that follow give its phone, address and hours where the office publishes them.

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Arrests, jail and inmate lookups in Nassau County

A person arrested in Nassau County is booked into the jail, and the booking record (name, charges, bond and the next court date) is public in most cases. The office below is the one SearchSystems verified for jail and inmate information in Nassau County.

SearchSystems has not yet verified an online jail or inmate page for Nassau County. The sheriff's office is the place to ask, and the state inmate locator in the statewide sources below covers state prisons.

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Court records and case lookups in Nassau County

Civil, criminal, family, probate and traffic cases filed in Nassau County are kept by the clerk of the court that heard them. Many courts offer an online case search; the page below is the one SearchSystems verified for Nassau County.

  • Website: iapps.courts.state.ny.us/nyscef/CaseSearch
  • Checked: October 2, 2026, the site blocks automated checks (HTTP 403), and the page was found in a live search index on October 2, 2026; open it directly in a browser.

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County Clerk of Nassau County

The county clerk is the county's record keeper. What the office holds differs by state: in some states it files marriage licenses and vital records, in others deeds, court papers or the meeting records of the governing board. Its own website below says what it holds in Nassau County.

  • Website: nassaucountyny.gov/458/County-Clerk (page title: Welcome from County Clerk Maureen O'Connell | Nassau County, NY)
  • Address: 99 Washington Avenue, 6th Floor, Albany, NY 12231
  • Checked: September 23, 2026, the page answered.

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Deeds, land records and property values in Nassau County

Two offices share property records. The recording office files deeds, mortgages, liens and the other documents that affect title to land in Nassau County. The assessment office sets the taxable value of each parcel and usually offers a free parcel search by address or owner name.

Recorded documents: County Clerk (land records)

Property values: Real Property Tax Services

  • Website: nassaucountyny.gov/3752/Property-Assessment (page title: Property Assessment | Nassau County, NY)
  • Phone: (516) 571-1500
  • Address: 240 Old Country Road 4 th Floor Mineola, NY 11501
  • Hours: Monday - Friday 8 a.m. - 4:30 p.m.
  • Checked: September 23, 2026, the page answered.

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Birth, death and marriage records in Nassau County

Certified copies of birth and death certificates for events in Nassau County are issued by the office below. The New York state vital records office also issues certified copies for any event in the state.

  • Website: nassaucountyny.gov/479/Vital-Records (page title: Vital Records | Nassau County, NY)
  • Phone: 516-493-3800
  • Address: 54 Audrey Ave. Oyster Bay, NY 11771
  • Checked: September 23, 2026, the page answered.

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District Attorney for Nassau County

The District Attorney is the office that prosecutes criminal cases in Nassau County. The case files themselves are court records (above); the prosecutor's office handles victim services and questions about pending prosecutions.

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Public records requests to Nassau County

Every state has a public records law that applies to county offices. A record that is not posted online is requested from the office that holds it. Many counties run one request page for every department; it is listed below when SearchSystems verified one for Nassau County.

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Statewide New York sources

Some records are kept by the state rather than the county. These are the New York state offices SearchSystems verified; each link opens the state office's own page.

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These links come from the SearchSystems directory for Nassau County and were opened again on October 2, 2026. Each one still answers.

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Cities and towns in Nassau County

Nassau County has 66 incorporated cities and towns (2024 Census Bureau count, population in parentheses). City records such as council minutes, permits, business licenses and police reports are kept by each city; the records on this page are county records whatever the city. SearchSystems has a guide to the city offices of each linked city; the linked names open them.

40 of the 66 are listed: every city with its own guide and the largest of the rest.

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Nassau County Arrest Records

The Nassau County arrest records guide names the 24 agencies that report arrests to the FBI here and the 17,730 arrests the 19 agencies with every month of 2025 on file reported that year. It also says where a person arrested here is held, how to find out about an arrest and how to get a copy of the report.

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Nassau County Records Guides

SearchSystems has eight more guides to Nassau County, each written from the county's own offices and figures: Nassau County warrants (who issues and serves them, where a person arrested on one is held, how to check for one), Nassau County criminal records (the court file, the New York criminal history and the local arrest records), Nassau County court records (which court hears what, the case search and who keeps the files), Nassau County police reports (which agency holds a report and what the Freedom of Information Law requires), Nassau County traffic tickets (which court takes the ticket, who writes them and the driving record), Nassau County DUI (the DWI law, the arrest, the court case and the license case), Nassau County divorce records (which court holds the file and how a certified copy is had) and Nassau County property records (deeds, assessed values, permits and evictions).

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Frequently Asked Questions

Is this the official Nassau County website?

No. SearchSystems.net is an independent public records directory, online since 1997. It links to the official offices listed above; SearchSystems does not hold records, charge for them or take requests.

Who records deeds in Nassau County?

The County Clerk (land records), at nassaucountyny.gov/3998/Land-Records. Deeds, mortgages and liens on land in Nassau County are filed there.

How do I get a birth or death certificate for Nassau County?

From the office SearchSystems verified for Nassau County vital records at nassaucountyny.gov/479/Vital-Records, phone 516-493-3800, or from the New York state vital records office.

How do I request a public record from Nassau County?

Through the records request page at nassaucountyny.gov. A record that is not covered there is requested from the office that holds it.