Resident Population in Berkshire County, MA was 128.72600 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Berkshire County, MA reached a record high of 151.00000 in January of 1971 and a record low of 125.21700 in January of 2019. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Berkshire County, MA - last updated from the United States Federal Reserve on September of 2025.