Resident Population in Franklin County, MA was 70.83600 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Franklin County, MA reached a record high of 71.93700 in January of 2004 and a record low of 59.21000 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Franklin County, MA - last updated from the United States Federal Reserve on May of 2024.