Johns Island is a barrier island off the coast of Charleston County. It is inshore of Seabrook Island and Kiawah, west of James Island, east of Wadmalaw Island, and separated from the mainland by the Stono River which is part of the Intracoastal Waterway. Almost one-third of the island has been annexed by the City of Charleston.
The island is home to the venerable Angel Oak, a live oak tree said to be between 500 and 1,500 years old. The tree is 65-feet tall, but the shaded area covered by its foliage extends over 17,000 square feet. The City of Charleston has established a small park surrounding the tree and operates a visitors center on the property.