Resident Population in Salem County, NJ was 65.87400 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Salem County, NJ reached a record high of 66.43800 in January of 2009 and a record low of 60.34600 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Salem County, NJ - last updated from the United States Federal Reserve on April of 2026.