St. Marys is a city in Camden County, Georgia, United States. The city is the gateway to Cumberland Island National Seashore, the largest of the Georgia Coast's barrier islands. The National Seashore's visitor center and boat access are both located at the St. Marys waterfront. The city is also home to the annual St. Marys Rock Shrimp Festival, the St. Marys Submarine Museum, and Crooked River State Park. Its territory is immediately bordered by Kings Bay Naval Submarine Base, which is the home port for several. The population of St. Marys was 17,121 as of the 2010 Census.HistoryThe St. Marys area was first explored in the mid 16th century as part of the settlement of Spanish Florida, with nearby St. Augustine as the established capital. Settlement for Georgians became legal after the Treaty of Paris in 1763.Local inhabitants of Camden County gathered on Cumberland Island and signed a charter for "a town on the St. Marys" on November 20, 1787. There were twenty charter members who each received four town lots and one marsh lot (outside the boundary of the town on the east side in the marshes); each lot was square, with the total town area being. These twenty city founders are named on an historical marker in downtown St. Marys: Isaac Wheeler, William Norris, Nathaniel Ashley, William Ashley, Lodowick Ashley, James Seagrove, James Finley, John Fleming, Robert Seagrove, Henry Osborne, Thomas Norris, Jacob Weed, John Alexander, Langley Bryant, Jonathan Bartlett, Stephen Conyers, William Keady, Prentis Gallup, Simeon Dillingham and Richard Cole.