Resident Population in Ontario County, NY was 112.49400 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Ontario County, NY reached a record high of 112.70700 in January of 2022 and a record low of 78.84900 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Ontario County, NY - last updated from the United States Federal Reserve on May of 2024.