St. Marys is a city in Camden County, Georgia, United States — located on the southern border of Camden County on the St. Marys River, with the Florida border just to the south across the river; Cumberland Island National Seashore to the northeast; Kingsland, Georgia to the west; Jacksonville, Florida 38 miles to the south and Savannah, Georgia 110 miles to the 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. First explored in the mid 16th century as part of the settlement of Spanish Florida, by the 2010 census, the city had a population of 17,121.

Kingsland is a city in Camden County, Georgia, United States. The population was 15,946 at the 2010 census.The Kingsland Commercial Historic District was added to the National Register of Historic Places on March 17, 1994. It includes the area surrounding South Lee Street between King Street and William Street. Kingsland hosts an annual Catfish Festival on Labor Day weekend. Kingsland is also home to Neutral Zone Studios, where Star Trek fans can come and make Star Trek fan films, the most notable being Star Trek Continues.

Jacksonville is the most populous city in Florida, and is the largest city by area in the contiguous United States as of 2020. It is the seat of Duval County, with which the city government consolidated in 1968. Consolidation gave Jacksonville its great size and placed most of its metropolitan population within the city limits. As of 2020, Jacksonville's population is 949,611, making it the 12th most populous city in the U.S., the most populous city in the Southeast, and the most populous city in the South outside of the state of Texas. The Jacksonville metropolitan area has a population of 1,523,615 and is the fourth largest metropolitan area in Florida.Jacksonville is centered on the banks of the St. Johns River in the First Coast region of northeast Florida, about 25 miles (40 km) south of the Georgia state line and 328 miles (528 km) north of Miami. The Jacksonville Beaches communities are along the adjacent Atlantic coast. The area was originally inhabited by the Timucua people, and in 1564 was the site of the French colony of Fort Caroline, one of the earliest European settlements in what is now the continental United States. Under British rule, a settlement grew at the narrow point in the river where cattle crossed, known as Wacca Pilatka to the Seminole and the Cow Ford to the British. A platted town was established there in 1822, a year after the United States gained Florida from Spain; it was named after Andrew Jackson, the first military governor of the Florida Territory and seventh President of the United States. Harbor improvements since the late 19th century have made Jacksonville a major military and civilian deep-water port. Its riverine location facilitates Naval Station Mayport, Naval Air Station Jacksonville, the U.S. Marine Corps Blount Island Command, and the Port of Jacksonville, Florida's third largest seaport. Jacksonville's military bases and the nearby Naval Submarine Base Kings Bay form the third largest military presence in the United States. Significant factors in the local economy include services such as banking, insurance, healthcare and logistics. As with much of Florida, tourism is important to the Jacksonville area, particularly tourism related to golf. People from Jacksonville are sometimes called "Jacksonvillians" or "Jaxsons" (also spelled "Jaxons").

Jekyll Island is located off the coast of the U.S. state of Georgia, in Glynn County. It is one of the Sea Islands and one of the Golden Isles of Georgia barrier islands. The island is owned by the State of Georgia and run by a self-sustaining, self-governing body.It was long used seasonally by indigenous peoples of the region. The Guale and the Mocama, the indigenous peoples of the area when Europeans first reached the area, were killed or forced to leave by the English of the Province of Carolina and their native allies, and by raids by French pirates. Plantations were developed on the island during the British colonial period. A few structures still standing are made of tabby, a coastal building material of crushed oyster shells. The island was developed in the late 19th and early 20th centuries. It was evacuated during World War II by order of the US government. In 1947 the state of Georgia acquired all the property, for security and preservation. A popular tourist destination, the island has beaches frequented by vacationers. Guided tours of the Landmark Historic District are available. Bike trails, walks along the beaches and sandbars, and Summer Waves, a water park, are among the active attractions. The historic district features numerous impressive and ambitious buildings from the late nineteenth and early twentieth centuries. The island is also full of wildlife, consisting of many different mammals, reptiles, and birds living and breeding in the island's inland salt marshes. In 2018, Architectural Digest named Jekyll Island one of the 50 most beautiful small towns in America.The island was listed as a census-designated place prior to the 2020 census.