This layer contains parcels data for Oswego County, NY as taken from the current digitized version of the county tax maps. Originally drawn by Stewart Mapping Services, Inc of San Antonio Texas in 1975, but with digital topology corrected by Oswego County's Department of Real Property Tax Services from 1996-present. Contains taxable parcels attributed with assessment data taken from local assessment rolls.Geography is based upon the taxable status date of March 1st, 2025. Assessment attributes are from the latest final assessment roll (2024) except ownership which is updated bi-monthly on Fridays to reflect the most current owners of record. Click here to retrieve a data dictionary for decoding fields.Note: The original tax maps that these files were digitized from only had an accuracy between 10-20 feet on ground. While every effort is made to maintain this geographic data in an accurate format, the lines drawn from this data are fundamentally informational in nature and are not equivalent to survey grade. Geoprocessing has been applied to this specific web layer to allow faster drawing of lines which can further degrade the accuracy of their geometry. Finally, these parcels are used to create county tax maps which have the sole use case of giving assistance for local municipal assessors in the fulfillment of their duties, there is no warranty (expressed or implied) for any other use.

The PDF tax maps are organized by Municipality and Section number and are the same resources used to print the paper copies of tax maps that you might find in your local assessor's office. These tax maps are hosted on Oswego County's Image Mate Online website. You will need a compatible PDF viewer in order to display these maps.

City, Town, and Village boundary file, digitized from the Oswego County, NY tax maps as originally drawn by Stewart Mapping Services, Inc of San Antonio Texas, but with topology corrected by Oswego County Department of Real Property Tax Services.

Web map with auction property point layer and default bidder list. Display is set to the current year's auction for Active and Sold parcels.

*This layer is a work in progress*Oswego County began the process of digitizing zoning maps into digital geospatial data in 2022. Accuracy of these zones is not guaranteed due to the fact that this data is being digitized from paper maps. Zoning in Oswego County is handled at the local municipal level by Cities, Towns, and Villages and any questioning concerning zoning should be directed to the agency responsible for zoning in those communities, typically the Zoning Board or Code Enforcement Officer.

The Oswego County Active Tax Parcels layer only displays the parcel geography as of the most recent taxable status date (March 1st). All parcel changes that occur after that date must be applied to the next assessment year. During the interim between taxable status dates, changes to parcels (including subdivisions, splits, and merges) are added to this proposed parcel layer. This layer is truncated on the next ensuing taxable status date once those changes are applied to the Active parcel layer.

A web service of the Address Point file of buildings and properties in New York State. See metadata for additional information. Additional metadata, including field descriptions, can be found at the NYS GIS Clearinghouse: https://gis.ny.gov/gisdata/inventories/details.cfm?DSID=921.SAM Address Points Data Dictionary: https://gis.ny.gov/gisdata/supportfiles/Address-Points-Data-Dictionary.pdfIf the purpose of accessing the address points service is for geocoding, NYS ITS has a publicly available geocoding service which includes the address points along with other layers. For more information about the geocoding service, please visit: https://gis.ny.gov/gisdata/inventories/details.cfm?DSID=1278.For more information about the SAM Program, please visit:https://gis.ny.gov/streets.Publication Date: See Update FrequencyCurrent as of Date: 2 business days prior to Publication DateUpdate frequency: Second and forth Fridays of each monthThis 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.

A map used in the Election Polling Places application to locate the polling place where ballots can be cast on Election Day.

A map used in the My Elected Representative application to determine who represents them in local, state, and federal elected offices.