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Nassau County, NY Parcels & GIS Data

Nassau County, NY parcel data: 439,031 property records with owner names, assessed values, land use, acreage, and addresses. Preview and download.

Land Records publishes Nassau County, New York parcel data covering 439,031 property records.

This page documents parcel-level coverage for Nassau County, New York. Each parcel record carries its boundary polygon (GIS geometry) along with attributes such as the parcel ID/APN, owner name and mailing address, situs (property) address, assessed land and improvement values, acreage, land-use and zoning codes, year built, and most recent sale price and date. Exact fill rates for Nassau County are listed in the attribute-coverage table below. Preview the data in the interactive explorer, or download the complete Nassau County property dataset.

Nassau County is a densely populated and affluent suburban county located on Long Island, immediately to the east of New York City, bordering the Long Island Sound on the north and the open Atlantic Ocean to the south. As of the 2020 United States census, Nassau County's population was 1,395,774, making it the sixth-most populous county in the State of New York and 29th in the nation, reflecting an increase of 56,242 (+4.2%) from the 1,339,532 residents enumerated at the 2010 census. By 2025, Nassau's population was approaching 1.4 million, driven by a high influx of Asians. The county seat is Mineola, while Nassau County's largest and most populous town is Hempstead.

FIPS 36059

Official county website: http://www.nassaucountyny.gov

The FIPS code for Nassau County is 36059.

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Attribute coverage

Nassau County contains 439,031 parcels in the current dataset. Column coverage is the percentage of those parcels for which the attribute is populated (non-NULL). For the LBCS columns, only real classifications count: the to-be-determined and not-applicable placeholder codes are excluded.

ColumnCoverageRecords populated
lrid100%439,031
parcelid100%438,857
parcelid2100%439,013
ogparcelid100%439,026
ogparcelid2100%439,013
parentid<0.1%0
stackid<0.1%0
geoid100%439,031
statefp100%439,031
countyfp100%439,031
countyname100%439,031
cousubfp100%439,031
cousubname100%439,031
tractce100%439,031
tractname100%439,031
taxacctnum<0.1%6
taxyear100%439,031
taxdistrict<0.1%2
usecode95.3%418,523
usedesc98.8%433,859
zoningcode<0.1%17
zoningdesc0.1%373
numbldgs100%439,016
numunits0.2%870
yearbuilt<0.1%34
numfloors0.2%852
bldgsqft<0.1%18
bedrooms<0.1%0
halfbaths<0.1%0
fullbaths<0.1%0
imprvalue<0.1%0
landvalue<0.1%46
agvalue<0.1%0
totalvalue<0.1%46
taxacres95.7%420,195
calcarea100%439,031
saleamt<0.1%0
saledate<0.1%0
ownertype95.5%419,487
ownername95.5%419,487
owneraddr95.3%418,425
ownercity95.3%418,489
ownerstate95.3%418,308
ownerzip95.3%418,482
parceladdr99.8%438,325
parcelcity100%439,014
parcelstate100%439,031
parcelzip100%439,030
legaldesc59.4%260,575
township<0.1%0
section<0.1%0
qtrsection<0.1%0
range<0.1%0
plssdesc<0.1%0
book<0.1%4
page<0.1%4
block59.4%260,619
lot<0.1%18
parceltype0.3%1,185
accesstype0.4%1,638
iucnclass0.1%330
placename5.8%25,577
placetype5.7%25,027
firmid100%439,031
firmdate100%439,031
fldzone100%439,031
zonesubty87.8%385,293
staticbfe12.1%53,207
elevmin100%438,914
elevmax100%438,914
elevavg100%438,914
fireplaces<0.1%0
heating<0.1%0
heatfuel<0.1%0
cooling<0.1%0
foundation<0.1%0
roofcover<0.1%0
siding<0.1%0
bldgtype<0.1%0
naicscode5.4%23,553
frsid<0.1%0
dfrurl<0.1%0
caapermit<0.1%0
cwapermit<0.1%0
rcrapermit<0.1%0
updated100%439,016
centroidx100%439,031
centroidy100%439,031
surfpointx100%439,031
surfpointy100%439,031
geom100%439,031
extras100%439,031
ownerlist82.7%363,098
placefp99.9%438,468
zoningurl<0.1%16
lbcsactivity99.7%437,743
lbcsfunction99.7%437,564
lbcstype99.8%438,199
lbcscharacter99.7%437,774
lbcsownership95.6%419,583
sourceurl<0.1%0

Schema mapping

How source columns from the acquired Nassau County GIS layers map into the harmonized entity schemas and assemble into the published parcel table, alongside supplemented fields (elevation, flood zone) and deterministic columns.

Schema mapping — Nassau County, New York (36059) 2 entities · most recent acquisition per entity · generated 2026-10-17 direct column transformed (expression) geometry extras json supplemented determined ALL ENTITIES → FINAL PARCEL SCHEMA Harmonized entity columns assemble into publish.parcel_layer — matched by column name. Supplemented fields show their fill rate in this county. SOURCE COLUMNS HARMONIZED ENTITIES PUBLISH.PARCEL_LAYER PARCEL sbl muni_parcel_id roll_yr used_as_code used_as_desc yr_blt gfa sqft_living nbr_bedrooms nbr_full_baths land_av total_av acres primary_owner add_owner mail_addr mail_city mail_state mail_zip parcel_addr muni_name loc_zip book page geom fuel_type_desc heat_type_desc county_name swis print_key citytown_name citytown_swis loc_st_nbr loc_street loc_unit prop_class roll_section full_market_val front depth sq_ft school_code school_name sewer_type sewer_desc water_supply water_desc utilities utilities_desc bldg_style bldg_style_desc heat_type fuel_type nbr_kitchens ag_dist_code ag_dist_name po_box add_mail_addr add_mail_po_box add_mail_city add_mail_state add_mail_zip grid_east grid_north swis_sbl_id swis_print_key_id spatial_yr owner_type nys_name nys_name_source dup_geo calc_acres parcelid parcelid2 taxyear usecode usedesc yearbuilt bldgsqft bedrooms fullbaths landvalue totalvalue taxacres ownername owneraddr ownercity ownerstate ownerzip parceladdr parcelcity parcelstate parcelzip book page geom heatfuel heating extras ZONING geom zone title category descriptio 24 cols ⇢ geom zoningcode zoningdesc zoningtype notes extras determined · ground truth 100% lrid 100% geoid 100% statefp 100% countyfp 100% countyname 100% cousubfp 100% cousubname 100% tractce 100% tractname 100% updated geom · derived from geometry geom dem.us_1m · USGS 1m DEM 100% elevmin 100% elevmax 100% elevavg s_fld_haz_ar · FEMA NFHL 100% fldzone 87.8% zonesubty 12.1% staticbfe 100% firmdate 100% firmid supplemented · derived / other pipelines 100% numbldgs 59.4% legaldesc 59.4% block 82.7% ownerlist 100% placefp 100% lbcsactivity 100% lbcsfunction 100% lbcstype 100% lbcscharacter 95.6% lbcsownership lrid parcelid parcelid2 ogparcelid ogparcelid2 geoid statefp countyfp countyname cousubfp cousubname tractce tractname taxyear usecode usedesc zoningcode zoningdesc numbldgs yearbuilt bldgsqft bedrooms fullbaths landvalue totalvalue taxacres calcarea ownertype ownername owneraddr ownercity ownerstate ownerzip parceladdr parcelcity parcelstate parcelzip legaldesc book page block firmid firmdate fldzone zonesubty staticbfe elevmin elevmax elevavg heating heatfuel updated centroidx centroidy surfpointx surfpointy geom extras ownerlist placefp lbcsactivity lbcsfunction lbcstype lbcscharacter lbcsownership publish.parcel_layer columns not fed by these sources (36) — empty or below 50% fill in this county parentid, stackid, taxacctnum, taxdistrict, numunits, numfloors, halfbaths, imprvalue, agvalue, saleamt, saledate, township, section qtrsection, range, plssdesc, lot, parceltype, accesstype, iucnclass, placename, placetype, fireplaces, cooling, foundation, roofcover, siding bldgtype, naicscode, frsid, dfrurl, caapermit, cwapermit, rcrapermit, zoningurl, sourceurl PARCEL 27 mapped · 4 transformed · 28 unmapped (NULL) SOURCE COLUMNS HARMONIZED → PARCEL sbl muni_parcel_id roll_yr used_as_code used_as_desc yr_blt gfa sqft_living nbr_bedrooms nbr_full_baths land_av total_av acres primary_owner add_owner mail_addr mail_city mail_state mail_zip parcel_addr muni_name loc_zip book page geom fuel_type_desc heat_type_desc county_name swis print_key citytown_name citytown_swis loc_st_nbr loc_street loc_unit prop_class roll_section full_market_val front depth sq_ft school_code school_name sewer_type sewer_desc water_supply water_desc utilities utilities_desc bldg_style bldg_style_desc heat_type fuel_type nbr_kitchens ag_dist_code ag_dist_name po_box add_mail_addr add_mail_po_box add_mail_city add_mail_state add_mail_zip grid_east grid_north swis_sbl_id swis_print_key_id spatial_yr owner_type nys_name nys_name_source dup_geo calc_acres parcelid parcelid2 taxyear usecode usedesc yearbuilt bldgsqft COALESCE(gfa::text, sqft_living::text) bedrooms fullbaths landvalue totalvalue taxacres ownername NULLIF(concat_ws(';', NULLIF(primary_owner::text, ''), NULLIF(a… owneraddr ownercity ownerstate ownerzip parceladdr parcelcity parcelstate 'NY'::text parcelzip book page geom heatfuel heating extras ( json_build_object( 'county_name', county_name::text, 'swis', … not present in source — filled with NULL (28) taxacctnum, zoningcode, zoningdesc, numbldgs, numunits, numfloors, halfbaths, imprvalue, agvalue, saleamt, saledate, legaldesc, township section, qtrsection, range, plssdesc, block, lot, updated, sourceurl, taxdistrict, parentid, fireplaces, cooling, foundation, roofcover, siding ZONING 5 mapped · 4 transformed · 24 kept in extras · 4 unmapped (NULL) SOURCE COLUMNS HARMONIZED → ZONING geom zone title category descriptio geom zoningcode COALESCE(zone::text, '') zoningdesc COALESCE(title::text, '') zoningtype COALESCE(category::text, '') notes COALESCE(descriptio::text, '') extras · 24 source columns preserved as json ncid, parcelkey, roll_year, t_section, t_block, t_lot_numb t_lot_suff, t_condo_bu, t_condo_un, t_owner_fi, t_owner_la t_company_, owner, t_property, t_proper_1, t_proper_2 t_proper_3, t_proper_4, t_lot_grou, t_total_la, t_total_as t_parcel_s, t_prop_cla, village_us extras not present in source — filled with NULL (4) ordinance, setbacks, restrictions, sourceurl

Neighboring counties

Parcel data for counties bordering Nassau County:

Frequently asked questions

Where can I find Nassau County, NY parcel and GIS data?

Land Records publishes a Nassau County, NY parcel dataset in which every parcel carries its boundary polygon (GIS geometry) along with ownership, assessed value, land use, acreage, and sale history. Preview it in the interactive explorer on this page, or download the full Nassau County, NY dataset as a GeoPackage or CSV.

How many parcels are in Nassau County, NY?

The current dataset contains 439,031 parcel records for Nassau County, NY, each with its boundary geometry and assessor attributes.

What is the FIPS code for Nassau County, NY?

The FIPS code for Nassau County, NY is 36059.

What information does each Nassau County, NY parcel record include?

Each Nassau County, NY parcel record includes the parcel ID/APN, owner name and mailing address, situs (property) address, assessed land and improvement values, acreage, land-use and zoning codes, year built, and the most recent sale price and date — plus the parcel boundary polygon. Per-attribute fill rates are listed in the coverage table on this page.

Is Nassau County, NY parcel data free?

You can preview Nassau County, NY parcels for free in the interactive explorer. The complete dataset is available as a one-time download or through the nationwide parcel web service; see the download options on this page for current pricing.

Does Nassau County, NY have an official GIS or property records website?

Yes — the official Nassau County, NY government website is linked in the county details above. Land Records standardizes Nassau County, NY assessor and recorder records into a single nationwide parcel schema with GIS boundary geometry.

On this page

Attribute coverageSchema mappingNeighboring countiesFAQRelated