St. Marys is a city in Camden County, Georgia, United States, located on the southern border of Camden County on the St. Marys River. The Florida border is just to the south across the river, Cumberland Island National Seashore is to the northeast, and Kingsland, Georgia, is to the west; Jacksonville, Florida, is 38 miles south, and Savannah, Georgia, is 110 miles north.
The city is home to the National Seashore's visitor center and boat access; the annual St. Marys Rock Shrimp Festival; the St. Marys Submarine Museum, and Crooked River State Park. It is bordered by Kings Bay Naval Submarine Base, home port for several Ohio-class submarines.
Wikipedia https://en.wikipedia.org/wiki/St._Marys,_Georgia
Coordinates 30°43'49.851" N -81°32'47.374" E