Pennsylvania Population change, 2000 to 2003 County 2000 pop 2003 pop Change State rank Pike 46,302 52,163 12.7% 1 Monroe 138,687 154,495 11.4% 2 Adams 91,292 96,456 5.7% 3 Chester 433,501 457,393 5.5% 4 Centre 135,758 141,636 4.3% 5 Northampton 267,066
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