Johns Island, also spelled John's Island, is an island 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 (220 km2) in area, with a population of 14,000 people. Johns Island was named after Saint John Parish in Barbados by the first settlers to the island.

Johns Island in United States offers a unique experience to travellers. The nearest major city to Johns Island is Charleston. Take a short trip from Johns Island and set some time aside to explore the Charleston. Dotted with places like Magnolia Plantation And Gardens, Charleston Waterfront Park, Arthur Ravenel Jr. Bridge; it will definitely be a good idea. Tour packages of Johns Island are of 1 to 2 days duration.