- Website of the Nassau County Department of Assessment is a comprehensive information resource offered by the Department of Assessment in Naussau County. It offers information about assessment roll data, tax maps, photographs of various properties in the county and much more. You can also find information on the past taxes as well as the current tax rates etc on

Public Information on Land Records and more available on also offers information on land records for property in Nassau County, Long Island, New York. All the information available on the site is maintained by the Department of Assessment and is offered for public benefit.




Thaddeus J. Jankowski, Jr.
County Assessor
240 Old Country Rd.
Mineola, NY 11501


Telephone:(516) 571-1500

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