The Francis Marion National Forrest is located North of Charleston, South Carolina. It is named for the revolutionary war hero Francis Marion or as known to the British aas the Swamp Fox. The National Forrest is contained entirly in the counties of Charleston and Berkely. Motto: Fedes Mores Juraque Curat Nickname: The Holy City, The Palmetto City Location in South Carolina Founded  -Incorporated 1670   County Berkeley County & Charleston County Mayor Joseph P. Riley, Jr. ... Charleston County is a county located in the state of South Carolina. ...