Resident Population in Cumberland County, NJ was 152.32600 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Cumberland County, NJ reached a record high of 157.72400 in January of 2009 and a record low of 121.37400 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Cumberland County, NJ - last updated from the United States Federal Reserve on June of 2024.