The Original Town of Fernandina Historic Site, also known as "Old Town", is a historic site in Fernandina Beach, Florida, located on Amelia Island. It is roughly bounded by Towngate Street, Bosque Bello Cemetery, Nassau, Marine, and Ladies Streets. On January 29, 1990, it was added to the U.S. National Register of Historic Places as a historic site. Lying north of the Fernandina Beach Historic District, it is accessible from North 14th Street.

Fernandina Beach is a city in northeastern Florida and the county seat of Nassau County, Florida, United States. It is the northernmost city on Florida's Atlantic coast, situated on Amelia Island, and is one of the principal municipalities comprising Greater Jacksonville. The area was first inhabited by the Timucuan Indian people. Known as the "Isle of 8 Flags", Amelia Island has had the flags of the following nations flown over it: France, Spain, Great Britain, Spain (again), the Republic of East Florida (1812), the Republic of the Floridas (1817), Mexico, the Confederate States of America, and the United States.