Apalachee Bay is a bay in the northeastern Gulf of Mexico occupying an indentation of the Florida coast to the west of where the Florida peninsula joins the United States mainland. It is bordered by Taylor, Jefferson, Wakulla, and Franklin counties.
The Aucilla, Econfina, St. Marks, and Ochlockonee rivers drain into the bay.
Most of the coast is the St. Marks National Wildlife Refuge.The mouth of the Bay stretches from Lighthouse Point on Saint Marks Island, in Fayette County south of Bald Point State Park, to Rock Island in Taylor County.
