St. Andrew's School is a Scottish-heritage independent college preparatory school located on Wilmington Island in Savannah, Georgia, United States. It is a registered 501(c)(3) non-profit organization. Established in 1978, it is dually accredited by Southern Association of Independent Schools and Southern Association of Colleges and Schools. The school serves students in Pre-K through 12th grade, and has several athletic and fine arts programs.

Wilmington Island is an unincorporated community and census-designated place (CDP) in Chatham County, Georgia. The population was 15,129 at the time of the 2020 U.S. census. It is part of the Savannah metropolitan area. The communities of Wilmington Island form a large and affluent suburb of Savannah, where most residents work. The island lies east of Savannah between the town of Thunderbolt and the beach city of Tybee Island.