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This application allows users to identify and locate parcel data by address, print key, owner name (if available). Users can also print maps, export a query result, and generate mailing labels needed for an 'abutters' notice. Select a municipality from the list below to view

Dataset identifies land use categories at the tax parcel level in Westchester County, NY, and includes other boundary and ownership references for the internal use of the County. Comprised of the most recent tax parcel files available as of publication date, originally obtained from the various Towns and cities, and modified by the Westchester County Department of Planning.

In 2008, County GIS developed the Natural Resource Inventory (NRI) map series to provide access to a wide range of environmental data in hardcopy (PDF) format. The countywide maps were generated in a uniform grid and scale (800’) optimized to be printed on 11X17 sized paper. The inventory included a number of environmental features, several of which have been updated since initial publication in 2008. Today, ArcGIS.com technology has made it possible for County GIS to provide the NRIs map series online. Using selected feature layers from the existing and publicly available Environmental Features map service, a new web map was created to include all of the same data in the original NRI map series. The new web map, which also includes the original map grid for reference purposes, will enable users to change base maps, use measuring tools, draw and redline on the map, and access feature attribute data.

Mapping Westchester County: a comprehensive and dynamic map service: environmental features, community facilities, political boundaries, transportation, census boundaries and demographics.

Publication Date: April 2025. The Westchester County Parcels layer contains 2023- 2024 parcel data only for the County which gave NYS ITS Geospatial Services permission to share this data with the public. No attempt was made to edge-match parcels along adjacent counties. County attribute values were populated using 2024 Assessment Roll tabular data Geospatial Services obtained from the NYS Department of Tax and Finance’s Office of Real Property Tax Services (ORPTS).Tabular assessment data was joined to the county provided parcel geometry using the SWIS & SBL or SWIS & PRINT KEY unique identifier for each parcel. Detailed information about assessment attributes can be found in the ORPTS Assessor’s Manuals available here: https://www.tax.ny.gov/research/property/assess/manuals/assersmanual.htm. This map service is available to the public. The State of New York, acting through the New York State Office of Information Technology Services, makes no representations or warranties, express or implied, with respect to the use of or reliance on the Data provided. The User accepts the Data provided “as is” with no guarantees that it is error free, complete, accurate, current or fit for any particular purpose and assumes all risks associated with its use. The State disclaims any responsibility or legal liability to Users for damages of any kind, relating to the providing of the Data or the use of it. Users should be aware that temporal changes may have occurred since this Data was created.

The TIGER/Line shapefiles and related database files (.dbf) are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) Database (MTDB). The MTDB represents a seamless national file with no overlaps or gaps between parts, however, each TIGER/Line shapefile is designed to stand alone as an independent data set, or they can be combined to cover the entire nation. Census Blocks are statistical areas bounded on all sides by visible features, such as streets, roads, streams, and railroad tracks, and/or by nonvisible boundaries such as city, town, township, and county limits, and short line-of-sight extensions of streets and roads. Census blocks are relatively small in area; for example, a block in a city bounded by streets. However, census blocks in remote areas are often large and irregular and may even be many square miles in area. A common misunderstanding is that data users think census blocks are used geographically to build all other census geographic areas, rather all other census geographic areas are updated and then used as the primary constraints, along with roads and water features, to delineate the tabulation blocks. As a result, all 2020 Census blocks nest within every other 2020 Census geographic area, so that Census Bureau statistical data can be tabulated at the block level and aggregated up to the appropriate geographic areas. Census blocks cover all territory in the United States, Puerto Rico, and the Island Areas (American Samoa, Guam, the Commonwealth of the Northern Mariana Islands, and the U.S. Virgin Islands). Blocks are the smallest geographic areas for which the Census Bureau publishes data from the decennial census. A block may consist of one or more faces.

Data includes location of all Post Offices in Westchester County, New York as of November 2019. Data was collected from the USPS website: https://tools.usps.com/find-location.htm. Locations were verified with Google Street Viewer. Tax parcels and building footprint data was used along with 2018 aerial photos to mark the locations.

Mapping Westchester County: a comprehensive and dynamic map service: environmental features, community facilities, political boundaries, transportation, census boundaries and demographics.

This data layer represents a comprehensive countywide update to the 2021 major open spaces GIS data layer and map. In 2021, a new category was added, and polygons for each municipality were verified by their respective government officials. There are 13 open space categories, including many smaller properties not previously mapped. Properties classified as Farms derived from the Westchester County Agricultural District established in 2000. The information used to compile the data came from a variety of sources including aerial photography, digital tax parcel data, local recreation, land use, and master plan maps. Other sources included municipal planning departments and consultants, conservation committees, and the Westchester Land Trust.

Dataset represents the forty-four (44) public libraries in Westchester County, New York, with each library's name, address, internet home page and other contact information, taken from the Westchester Library System (WLS) website https://www.westchesterlibraries.org/about-wls/member-libraries/list-of-member-libraries/ These points are spatially located at building footprints for Emergency Services. Scarsdale Public Library is currently under renovation and has a temporary location. Data up to date as of November 2019.

February 2020. HERE Postal Code Boundaries.

This dataset identifies areas with steep slopes in two categories used in local planning agencies: slopes 15-25% and slopes over 25% (slope=rise/run).

This data represents roads under county jurisdiction in Westchester County. It is updated periodically to reflect changes in county road jurisdictional status as of August 2015. The data was provided by Westchester County Department of Public Works. NOTE: these centerlines were derived from a County data layer based on NYSDOT roads (1991); they do not align with newer, more spatially accurate base map road centerlines. This layer is used to determine if a municipal planning action such as zoning or site plan approval should be referred by the municipality to the County Planning Board for review and comment based on its proximity to these roads. Certain planning and zoning actions are subject to mandatory referral provisions of both Westchester County Administrative Code and NYS General Municipal Law based on their proximity to these County Roads (known as Referral Roads).

Compiled at a scale of 1:24,000, this data is intended for general planning purposes only, and may not be appropriate for site specific analysis. Updated (2012) to reflect basins renamed by the Westchester County Department of Planning and to align with updated Major and Minor Drainage Basins dataset "wcdrain".

This layer is a component of MunicipalTaxParcels.

This municipal tax parcel map service contains data for all 43 municipalities in Westchester County. The parcel data in the service are provided by each municipality (attributes may be different from municipality to municipality). The data made available in this service is for general information and planning purposes only, and should not be relied upon as a sole informational source. The County of Westchester hereby disclaims any liability for any and all damage, loss, or liability which may result, directly or indirectly, from the use of this GIS mapping system by any person or entity. Tax parcel boundaries represent approximate property line location and should NOT be interpreted as or used in lieu of a survey, property boundary description, or a definitive municipal tax map. Property descriptions must be obtained from surveys or deeds. As this data was compiled from many different sources, discrepancies will exist along some municipal boundaries. Authoritative and approved tax maps for this municipality ONLY reside with the local assessor. For more information please contact the local assessor's office.

Data layer derived from sewer districts mapped by the Department of Planning in 1997. Data was updated in 2020 to reflect all of the available Board of Legislators (BOL) approved additions and take-outs to the year 2019. Updates also include district boundaries updates in June 2015 by GIS to conform to new Westchester County Municipal Boundaries data layer updated in 2014.

This layer is a component of Community Features.

This file contains polygon data representing service areas that are part of public water supply systems within Westchester County, New York, based upon geographic data in GIS or CAD format provided by water supply systems and integrated into a common countywide feature class. Not all areas in the county served by public water supply systems are covered, and the accuracy of the geographic representations and attributes included in this dataset is dependent upon the accuracy of the source data, which has not been independently verified by Westchester GIS. The data was originally developed in 2012 and updated in Feb. 2015.

Geospatial data about Westchester County, New York Municipal Boundaries. Export to CAD, GIS, PDF, CSV and access via API.