All observations are July 1 estimate of each year.
This series is calculated by FRB-St. Louis using data from the Census Bureau. The FRB-Boston District includes all of Massachusetts, Maine, New Hampshire, Rhode Island, Vermont and Connecticut(excluding Fairfield County).
Source: US. Bureau of the Census
US. Bureau of the Census, Resident Population in FRB-Boston District [D1POP], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/D1POP/, October 14, 2015.