Resident Population in Suffolk County, NY was 1523.17000 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Suffolk County, NY reached a record high of 1533.11800 in January of 2021 and a record low of 1127.03000 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Suffolk County, NY - last updated from the United States Federal Reserve on May of 2024.