(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 10 Delaware........................... 753,538 666,168 87,370 13.1 10001 Kent County, DE.................... 126,048 110,993 15,055 13.6 10003 New Castle County, DE.............. 487,182 441,946 45,236 10.2 10005 Sussex County, DE.................. 140,308 113,229 27,079 23.9