Resident Population in Delaware County, NY was 44.19100 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Delaware County, NY reached a record high of 48.63800 in January of 1995 and a record low of 44.19100 in January of 2024. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Delaware County, NY - last updated from the United States Federal Reserve on April of 2026.