In north-central SC, south of Rock Hill; organized Mar 12, 1785 from Camden District. Name Origin: For Chester, PA Area (sq mi):: 586.16 (land 580.52; water 5.64) Population per square mile: 57.20 Population 2005: 33,228 State rank: 31 Population change: 2000-20005 -2.50%; 1990-...