(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 42 Pennsylvania....................... 11,994,016 11,882,842 111,174 0.9 42001 Adams County, PA................... 87,697 78,274 9,423 12.0 42003 Allegheny County, PA............... 1,256,806 1,336,449 -79,643 -6.0 42005 Armstrong County, PA............... 73,001 73,478 -477 -0.6 42007 Beaver County, PA.................. 182,687 186,093 -3,406 -1.8 42009 Bedford County, PA................. 49,699 47,919 1,780 3.7 42011 Berks County, PA................... 358,211 336,523 21,688 6.4 42013 Blair County, PA................... 129,937 130,542 -605 -0.5 42015 Bradford County, PA................ 62,146 60,967 1,179 1.9 42017 Bucks County, PA................... 594,047 541,174 52,873 9.8 42019 Butler County, PA.................. 172,522 152,013 20,509 13.5 42021 Cambria County, PA................. 153,766 163,062 -9,296 -5.7 42023 Cameron County, PA................. 5,571 5,913 -342 -5.8 42025 Carbon County, PA.................. 58,759 56,803 1,956 3.4 42027 Centre County, PA.................. 132,190 124,812 7,378 5.9 42029 Chester County, PA................. 430,001 376,389 53,612 14.2 42031 Clarion County, PA................. 41,651 41,699 -48 -0.1 42033 Clearfield County, PA.............. 80,732 78,097 2,635 3.4 42035 Clinton County, PA................. 36,774 37,182 -408 -1.1 42037 Columbia County, PA................ 63,674 63,202 472 0.7 42039 Crawford County, PA................ 89,109 86,166 2,943 3.4 42041 Cumberland County, PA.............. 210,663 195,257 15,406 7.9 42043 Dauphin County, PA................. 245,576 237,813 7,763 3.3 42045 Delaware County, PA................ 541,502 547,658 -6,156 -1.1 42047 Elk County, PA..................... 34,344 34,878 -534 -1.5 42049 Erie County, PA.................... 276,993 275,575 1,418 0.5 42051 Fayette County, PA................. 143,775 145,351 -1,576 -1.1 42053 Forest County, PA.................. 4,938 4,802 136 2.8 42055 Franklin County, PA................ 128,812 121,082 7,730 6.4 42057 Fulton County, PA.................. 14,616 13,837 779 5.6 42059 Greene County, PA.................. 42,072 39,550 2,522 6.4 42061 Huntingdon County, PA.............. 44,753 44,164 589 1.3 42063 Indiana County, PA................. 87,831 89,994 -2,163 -2.4 42065 Jefferson County, PA............... 46,086 46,083 3 0.0 42067 Juniata County, PA................. 22,204 20,625 1,579 7.7 42069 Lackawanna County, PA.............. 206,520 219,097 -12,577 -5.7 42071 Lancaster County, PA............... 460,035 422,822 37,213 8.8 42073 Lawrence County, PA................ 94,508 96,246 -1,738 -1.8 42075 Lebanon County, PA................. 117,856 113,744 4,112 3.6 42077 Lehigh County, PA.................. 299,855 291,130 8,725 3.0 42079 Luzerne County, PA................. 312,000 328,149 -16,149 -4.9 42081 Lycoming County, PA................ 116,709 118,710 -2,001 -1.7 42083 McKean County, PA.................. 45,987 47,131 -1,144 -2.4 42085 Mercer County, PA.................. 121,458 121,003 455 0.4 42087 Mifflin County, PA................. 46,793 46,197 596 1.3 42089 Monroe County, PA.................. 128,541 95,681 32,860 34.3 42091 Montgomery County, PA.............. 724,087 678,193 45,894 6.8 42093 Montour County, PA................. 17,571 17,735 -164 -0.9 42095 Northampton County, PA............. 259,736 247,110 12,626 5.1 42097 Northumberland County, PA.......... 93,163 96,771 -3,608 -3.7 42099 Perry County, PA................... 44,280 41,172 3,108 7.5 42101 Philadelphia County, PA............ 1,417,601 1,585,577 -167,976 -10.6 42103 Pike County, PA.................... 41,357 28,032 13,325 47.5 42105 Potter County, PA.................. 17,115 16,717 398 2.4 42107 Schuylkill County, PA.............. 148,788 152,585 -3,797 -2.5 42109 Snyder County, PA.................. 37,875 36,680 1,195 3.3 42111 Somerset County, PA................ 80,028 78,218 1,810 2.3 42113 Sullivan County, PA................ 6,038 6,104 -66 -1.1 42115 Susquehanna County, PA............. 42,190 40,380 1,810 4.5 42117 Tioga County, PA................... 41,657 41,126 531 1.3 42119 Union County, PA................... 40,546 36,176 4,370 12.1 42121 Venango County, PA................. 57,562 59,381 -1,819 -3.1 42123 Warren County, PA.................. 43,505 45,050 -1,545 -3.4 42125 Washington County, PA.............. 204,888 204,584 304 0.1 42127 Wayne County, PA................... 46,080 39,944 6,136 15.4 42129 Westmoreland County, PA............ 370,658 370,321 337 0.1 42131 Wyoming County, PA................. 29,298 28,076 1,222 4.4 42133 York County, PA.................... 376,586 339,574 37,012 10.9