Resident Population in Hamilton County, NY was 5.08200 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Hamilton County, NY reached a record high of 5.37800 in January of 2000 and a record low of 4.43800 in January of 2019. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Hamilton County, NY - last updated from the United States Federal Reserve on May of 2024.