Elizabeth Spring, also known as Elizabeth's Spring, is a historic water source in Warwick, Rhode Island, at the head of Greenwich Cove. Set on an embankment east of the railroad tracks and just north of Old Forge Road, it is not easily seen from the road. The spring is significant for its connection to Roger Williams, founder of Rhode Island, who wrote of visiting it with John Winthrop Jr. and linked it to Winthrop's wife, Elizabeth. Its location is identified by a circular millstone with a marble slab mounted in 1858, and the site was listed on the National Register of Historic Places in 1983.