Resident Population in Bergen County, NJ was 978.64100 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Bergen County, NJ reached a record high of 978.64100 in January of 2024 and a record low of 826.12900 in January of 1990. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Bergen County, NJ - last updated from the United States Federal Reserve on September of 2025.