For some southern Ontario counties, illustrated historical atlases show farm lots and concession numbers with the names of landowners in the late 1860s and 1870s. 14424 Real property home; STAR; New homebuyers; Municipal Profiles; Assessment community; Forms and guidance. SPONSORED SEARCHES Ontario County, New York Free Public Records Directory Find Public Records in Ontario County, New York This page lists public record sources in Ontario County, New York. PLEASE NOTE: Property information is maintained by the Assessor's Office. Find out how we carry out industrial property assessment. Tax Mapping | Ontario County, NY - Official Website The following video outlines how property taxes are calculated:How Your Property Tax is Calculated. Example: 1052532080000. Our modern telecommunications infrastructure, excellent health and social services, retail shopping, recreation facilities, beautiful landscapes and great people, make Middlesex the place to be! NY 47 Castle Street While The City of Hamilton provides this information in good faith, it does not warrant, covenant or guarantee the completeness and accuracy of the information. [CDATA[// >