(CO-99-2) County Population Estimates for July 1, 1999 and Population Change for April 1, 1990 to July 1, 1999 (includes revised April 1, 1990 Population Estimates Base) Source: Population Estimates Program, Population Division, U.S. Census Bureau, Washington, DC 20233 Contact: Demographic Call Center Staff, 1-866-758-1060 Internet Release Date: March 9, 2000 4/1/90 Numeric Percent Population Population Population 7/1/99 Estimates Change Change FIPS State/County Code and Area Name Estimate Base 1990-99 1990-99 25 Massachusetts...................... 6,175,169 6,016,425 158,744 2.6 25001 Barnstable County, MA.............. 212,519 186,605 25,914 13.9 25003 Berkshire County, MA............... 132,218 139,352 -7,134 -5.1 25005 Bristol County, MA................. 520,258 506,325 13,933 2.8 25007 Dukes County, MA................... 14,048 11,639 2,409 20.7 25009 Essex County, MA................... 704,407 670,080 34,327 5.1 25011 Franklin County, MA................ 70,806 70,086 720 1.0 25013 Hampden County, MA................. 438,279 456,310 -18,031 -4.0 25015 Hampshire County, MA............... 150,892 146,568 4,324 3.0 25017 Middlesex County, MA............... 1,426,606 1,398,468 28,138 2.0 25019 Nantucket County, MA............... 8,206 6,012 2,194 36.5 25021 Norfolk County, MA................. 643,580 616,087 27,493 4.5 25023 Plymouth County, MA................ 473,026 435,276 37,750 8.7 25025 Suffolk County, MA................. 641,695 663,906 -22,211 -3.3 25027 Worcester County, MA............... 738,629 709,711 28,918 4.1