Population Estimate, Total, Not Hispanic or Latino, Black or African American Alone (5-year estimate) in Middlesex County, MA was 78817.00000 Persons in January of 2022, according to the United States Federal Reserve. Historically, Population Estimate, Total, Not Hispanic or Latino, Black or African American Alone (5-year estimate) in Middlesex County, MA reached a record high of 79953.00000 in January of 2019 and a record low of 55935.00000 in January of 2009. Trading Economics provides the current actual value, an historical data chart and related indicators for Population Estimate, Total, Not Hispanic or Latino, Black or African American Alone (5-year estimate) in Middlesex County, MA - last updated from the United States Federal Reserve on May of 2024.