Resident Population in Dukes County, MA was 21.06100 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Dukes County, MA reached a record high of 21.11200 in January of 2021 and a record low of 6.11700 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Dukes County, MA - last updated from the United States Federal Reserve on April of 2026.