Suffolk County, NY GIS parcel data download

Download Suffolk County, New York GIS parcel data - 584,944 parcels with owner names, site & mailing addresses, acreage, land use, and sale values. Instant delivery in Shapefile, FileGDB, GeoPackage, GeoJSON & CSV. $100 per county.

Data freshness: Latest LASTUPDATE in Suffolk TaxParcelPolygon layer: 5/6/2026; last loaded into LandAI on 2026-05-12.

Every purchase includes all five export formats (Shapefile, FileGDB, GeoPackage, GeoJSON & CSV), standardized to the LandAI parcel schema with WGS84 (EPSG:4326) geometry. After checkout you choose which formats to generate and download them for 45 days.

What's in the Suffolk County dataset

Field completeness measured across 584,944 active parcels (Latest LASTUPDATE in Suffolk TaxParcelPolygon layer: 5/6/2026; last loaded into LandAI on 2026-05-12):

FieldCoverage
Owner names100%
Site addresses88.0%
Owner mailing addresses96.6%
Deeded acres96.9%
Calculated (GIS) acres100%
Land use0.4%
Assessed total value97.0%
Market total value97.0%
Year built13.6%
Building square footage13.2%

These are 10 of the 48 standardized fields in the LandAI parcel schema. Live per-field completeness for every field is shown on this page's interactive view.

Suffolk County parcel data FAQ

How many parcels are in Suffolk County, NY?

Suffolk County, New York has 584,944 active parcels in the LandAI dataset (source data as of 2026-05-06).

What fields are included in Suffolk County parcel data?

Every parcel includes the standardized LandAI schema: parcel ID and geometry plus owner names (100%), site addresses (88.0%), owner mailing addresses (96.6%), deeded acres (96.9%), calculated (GIS) acres (100%), land use (0.4%), assessed total value (97.0%), market total value (97.0%), and more.

What formats can I download Suffolk County GIS parcel data in?

Shapefile, FileGDB, GeoPackage, GeoJSON & CSV. Every $100 county purchase includes all five formats; you choose which to generate after checkout and can re-download for 45 days.

How current is the Suffolk County parcel data?

Latest LASTUPDATE in Suffolk TaxParcelPolygon layer: 5/6/2026; last loaded into LandAI on 2026-05-12.

Does Suffolk County parcel data include owner names?

Yes - 100% of Suffolk County parcels include a normalized owner name, along with owner mailing addresses where the county provides them.

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