Johns Island, is located in Charleston County, South Carolina, United States, and is the largest island in the state of South Carolina. Johns Island is bordered by the Wadmalaw, Seabrook, Kiawah, Edisto, Folly, and James islands; the Stono and Kiawah rivers separate Johns Island from its border islands. It is the fourth-largest island on the US east coast, surpassed only by Long Island, Mount Desert Island and Martha's Vineyard. Johns Island is 84 square miles in area. There is a plethora of wildlife, marshes, and oak trees on the Island. If you are looking for relaxed country living with an international airport and a sophisticated city nearby, Johns Island may be the place for you.