The population count of Norfolk County, MA was 677,296 in 2013. The population count of Plymouth County, MA was 497,386 in 2013. The population count of Hillsborough County, NH was 402,017 in 2013. The population count of Rockingham County, NH was 296,718 in 2013.
Population
Population Change
Above charts are based on data from the U.S. Census American Community Survey | ODN Dataset | API -