Ontario County, New York Property Owner Lookup
Who owns property in Ontario County? Enter the street address below to see the owner of record and the tax-roll mailing address as the public roll lists it.
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AssessorBrief is a private company, not affiliated with any county or government office.
For a title file, a lender package or a client memo, an Ontario County brief gives you the owner of record, tax-roll mailing address, site address, and assessed or market value (with Pro) in one place, cited to the New York tax parcel centroids (2025).
What's in an Ontario County brief
Every field named above, plus the parcel ID, a map, the file date, and brief and exhibit PDFs. See a sample brief
Source and citation
Every Ontario County brief cites the New York tax parcel centroids (2025). New York assessment is done town by town and city by city.
Ontario County at a glance
Ontario County is home to about 113,012 people, the 26th most populous of New York's 62 counties, with 0.6% of the state's residents. Its 644 square miles of land work out to roughly 175 residents per square mile, below the New York average of 422. Another 18 square miles are water.
Sources: Census Bureau population estimates (July 2024) and the Census 2024 Gazetteer.
Ontario County questions
Who owns property in Ontario County?
Enter the property's address above. You get the owner of record exactly as the New York tax parcel centroids (2025) lists it.
Who keeps property records in Ontario County?
In Ontario County, town and city assessors, county by county, keeps the roll. AssessorBrief cites it through the New York tax parcel centroids (2025).
What counties are near Ontario County?
The closest New York counties to Ontario County are Yates County, Seneca County, Livingston County, Wayne County, and Monroe County. Each lookup works the same way across the state line, too: Pro covers all states.
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Nearby counties
Data comes from the public assessor roll as published. Verify against the official record before relying on it. Not a title search or legal opinion. Use subject to our Terms.