Nassau County Flood Maps

Search for Nassau County NY flood maps. Flood maps include information on flood zones, flood hazards, flood insurance rates, FEMA flood plans, topography, soil composition, drainage patterns, and more.


Assessors in Nassau County New York are charged with determining the value of taxable property within a county or local area. These property value assessments are used to levy property taxes. In addition to tax assessment, assessors maintain detailed county and local maps that show parcel boundaries and buildings, including flood maps. These Nassau County flood maps show flood zones, flood damage, topography, and drainage patterns, which can impact property values. Nassau County Assessors may make flood maps available on their websites.

Freeport Assessor Freeport NY 46 North Ocean Avenue 11520 516-377-2256

Nassau County Assessor's Office Mineola NY 240 Old Country Road 11501 516-571-1500


Clerks in Nassau County New York keep public records for a county or local government, including a number of different types of documents. As part of their duties, Clerks maintain detailed maps, including Nassau County flood maps. These maps contain flood zone information, flood hazards, topography, rivers, lakes, and other bodies of water, as well as other flood-related information. Clerks may also keep Nassau County historical flood maps. These flood maps may be available through the Clerk's website.

Brookville Clerk East Norwich NY 104 Susan Cove 11732 516-922-8198

East Rockaway Clerk East Rockaway NY 376 Atlantic Avenue 11518 516-887-6312

Glen Cove Clerk Glen Cove NY 9 Glen Street 11542 516-676-2000

Hempstead Town Clerk Hempstead NY 1 Washington Street 11550 516-489-5000

Kensington Village Clerk Great Neck NY 2 Nassau Drive 11021 516-482-4409

Malverne Clerk Malverne NY 99 Church Street 11565 516-599-0722

Matinecock Village Clerk Locust Valley NY 63 Midway Avenue 11560 516-671-7790

Nassau County Clerk Westbury NY 1200 Old Country Road 11590 516-493-3900

Nassau County Clerk Mineola NY 1550 Franklin Avenue 11501 516-571-4010

New Hyde Park Clerk New Hyde Park NY 1420 Jericho Turnpike 11040 516-354-0022

North Hempstead Town Clerk Manhasset NY 200 Plandome Road 11030 516-869-7650

North Hills Clerk Roslyn NY 1 Shelter Rock Road 11576 516-365-8857

Old Westbury Village Clerk Old Westbury NY 1 Store Hill Road 11568 516-626-0800

Oyster Bay Town Clerk Oyster Bay NY 54 Audrey Avenue 11771 516-624-6320

Oyster Bay Town Clerk Massapequa NY 977 Hicksville Road 11758 516-797-7960

Plandome Village Clerk Manhasset NY 65 South Drive 11030 516-627-1748

Valley Stream Clerk Valley Stream NY 123 South Central Avenue 11580 516-825-4200

Westbury Village Clerk Westbury NY 235 Lincoln Place 11590 516-334-1700


Archives in Nassau County New York collect and store documents and other records that have historic value. Most archives also contain local Nassau County maps, including flood maps. These flood maps include Nassau County flood zones, topography, and soil composition. They may also show drainage patterns and flood hazards. Archives may also have historical flood maps that show major floods from the past as well as Nassau County flood plan improvements. Many archives are housed within libraries, and archives may provide online access to their flood map collections.

Cold Spring Harbor Laboratory Library and Archive Cold Spring Harbor NY 1 Bungtown Road 11724 516-367-6872

Valley Stream National Archive Valley Stream NY 200 East Merrick Road 11580 516-872-9700


Building Departments in Nassau County New York ensure the construction of safe buildings by creating and enforcing building codes. As part of this process, Nassau County Building Departments use flood maps to establish standards for building construction and resistance to natural disasters. Many maintain and evaluate flood maps, which include information on Nassau County flood zones, flood hazards, topography, soil composition, and flood drainage patterns. These maps may also include information on building codes and regulations related to flooding. These flood maps may be available online through the Building Department.

Freeport Building Department Freeport NY 46 North Ocean Avenue 11520 516-378-0700

Hempstead Building Department Hempstead NY 1 Washington Street 11550 516-538-8500

Hempstead Planning Department Roosevelt NY 383 Nassau Road 11575 516-378-2111

Hempstead Planning Department Hempstead NY 200 North Franklin Street 11550 516-538-7100

Lawrence Building Department Lawrence NY 196 Central Avenue 11559 516-239-3987

Manhasset Planning Department Manhasset NY 210 Plandome Road 11030 516-869-7752

Nassau County Planning Department Mineola NY 1 West Street 11501 516-571-4203

North Hempstead Building Department Manhasset NY 210 Plandome Road 11030 516-869-7680

North Hempstead Zoning Manhasset NY 210 Plandome Road 11030 516-869-7659

Oyster Bay Planning Department Oyster Bay NY 74 Audrey Avenue 11771 516-624-6200

Oyster Bay Zoning Oyster Bay NY 74 Audrey Avenue 11771 516-624-6232

Valley Stream Zoning Valley Stream NY 123 South Central Avenue 11580 516-825-8201


Emergency Services in Nassau County New York manage emergency preparations, responses, and recovery at different levels of government. They may handle natural disasters, severe weather incidents, and a number of other emergency situations. As part of their responsibility for preparedness, Emergency Services departments often maintain Nassau County flood maps, including flood zones, flood insurance rates, FEMA flood information, and flood hazards. The maps also show water flow and drainage patterns, and may contain emergency flood response information. Nassau County flood maps may be available online through Emergency Services departments.

Great Neck Emergency Services Great Neck Plaza NY 98 Cuttermill Road 11021 516-390-7162

Nassau County Emergency Services East Meadow NY 600 Newbridge Road 11554 516-826-0802

Nassau County Emergency Services Plainview NY 85 Jamaica Avenue 11803 516-822-7876

Rockville Centre Emergency Services Rockville Centre NY 30 Hempstead Avenue 11570 516-295-3737


Recorders of Deeds in Nassau County New York ensure the accuracy of property and land records by maintaining real estate ownership documents. In addition to property records, Recorders of Deeds also have detailed county and local maps that show property lines and building information, including flood maps. These flood maps show flood zones, topography, soil composition, and flood hazards, as well as other information related to Nassau County floods. Nassau County Recorders of Deeds may make flood maps available on their websites.

Nassau County Recorder of Deeds Mineola NY 240 Old Country Road 11501 516-571-1444