We Are Not a Government Custodian. Nassau County Residents Directory is private. We cannot pull or certify records, verify an address, or alter a government roll. Direct those requests to the office that holds the material. For an emergency call 911. If someone is stalking or harassing you, contact local law enforcement.
Official Record Contacts
For land documents, assessment information, or a public-records request, start with the appropriate Nassau County office rather than sending a request here.
Nassau County Clerk
240 Old Country Road
Mineola, NY 11501
516-571-2664
Monday through Friday, 9:00 a.m. to 4:30 p.m.; verify before travel.
Department of Assessment
240 Old Country Road, 4th Floor
Mineola, NY 11501
516-571-1500
Monday through Friday, 8:00 a.m. to 4:30 p.m.
Finding a Particular Record
Choose the record path that matches the question and the time period.
- Address and parcel evidence: use the Nassau County street directory.
- Old household and directory volumes: visit the Nassau County directory book.
- One-person verification: follow the resident lookup route.
- Records offices: use Nassau County records offices for custodian links.
- Records not online: submit a focused request under the New York Freedom of Information Law (FOIL) to the custodial office.