Florida Geography: The Statewide Guides

Florida covers 65,758 square miles, 22nd among the states, and runs 447 miles north to south from the St. Marys River to Key West, according to the Florida Department of State (Florida quick facts).

Of that Florida total, 53,625 square miles are land and 12,133 square miles are water. East to west the state spans 361 miles from the Atlantic Ocean to the Perdido River, and the road distance from Pensacola to Key West is 792 miles. The Department of State puts the geographic center of Florida 12 miles northwest of Brooksville, in Hernando County (Department of State). The Florida central ridge guide follows the inland ridges along the middle of the Florida peninsula.

The Florida Department of State lists 1,350 statute miles of coastline and 663 miles of beaches, while NOAA's Office for Coastal Management counts 8,436 miles of Florida coastline (Department of State, NOAA).

The two official figures differ, and neither source reconciles them: the Department of State also lists a separate general tidal shoreline of 2,276 statute miles, and NOAA files its 8,436 mile Florida count under beaches and estuaries. NOAA also counts 16,236,190 Florida coastal residents (NOAA Office for Coastal Management). The Florida coastal geography guide covers the Atlantic coast, the Gulf coast, barrier islands and beaches.

At the southern tip, the Florida Keys are a coral cay archipelago of over 40 main keys connected by the Overseas Highway, and Key Largo is the first and longest key, according to the Florida DEP coastal access guide for Monroe County (Florida DEP). The Florida Keys National Marine Sanctuary protects 4,539 square miles of waters around the Keys, from south of Miami westward to the Dry Tortugas, excluding Dry Tortugas National Park (NOAA sanctuary). The Florida DEP Monroe County guide gives a different size for the same sanctuary, 2,900 nautical square miles (Florida DEP). The Florida Keys geography guide covers how the island chain formed and how it is laid out.

The highest natural point in Florida is 345 feet, at Lakewood Park in northern Walton County in the Panhandle, the lowest high point of any state, according to the Department of State and Florida DEP (Department of State, Florida DEP, Walton County).

The Panhandle differs from the peninsula in water management and in time. The Northwest Florida Water Management District manages the water resources of the Florida panhandle across a 16-county region covering 11,305 square miles (NWFWMD). The federal line between the Eastern and Central time zones crosses Florida along the Apalachicola River south from Jim Woodruff Dam, then the Jackson River and the Intracoastal Waterway to the west line of Gulf County and south along that line to the Gulf of Mexico, and the regulation places municipalities on the boundary line in the central standard time zone (49 CFR 71.5). The Florida Panhandle region guide covers its 16 counties, the time zone line, the highest point, the geology and the coast.

Florida sits on carbonate rock: the Floridan aquifer system underlies approximately 100,000 square miles beneath all of Florida and parts of southeastern Georgia, Alabama and South Carolina, according to USGS (USGS).

USGS describes the Floridan aquifer as a sequence of Tertiary carbonate rocks from approximately 100 feet thick at its updip limit to over 3,300 feet, and as one of the most productive aquifers in the world (USGS Floridan aquifer). The Florida Geological Survey explains that slightly acidic groundwater slowly dissolves cavities in the limestone, and that since the entire state is underlain by carbonate rocks, sinkholes could theoretically form anywhere in Florida, though there are definite regions where sinkhole risk is considerably higher (Florida Geological Survey). The Florida peninsula geology guide covers the rock layers, karst and sinkholes in more depth.

The St. Johns is the longest river in Florida and Lake Okeechobee the largest lake, at 700 square miles, and Florida has about 7,700 lakes larger than 10 acres and 33 first-magnitude springs, according to the Florida Department of State (Department of State).

The two official St. Johns River lengths differ: the Department of State quick facts give 273 miles, while the St. Johns River Water Management District describes a 310-mile northerly journey from headwaters in Indian River County to the Atlantic Ocean at Mayport, north of Jacksonville (SJRWMD). The Department of State also counts about 4,500 Florida islands larger than 10 acres. The Florida watersheds overview covers the major river basins, where they drain and how they are restored.

Everglades National Park protects 1.5 million acres of wetland, forest and marine habitats, and was established in 1947 as the first national park created for its biodiversity (National Park Service). The Florida Everglades geography guide covers the geology, hydrology, habitats and restoration of that Florida wetland.

Florida has hot, humid summers and mild winters because it lies at subtropical latitudes next to the warm waters of the Gulf of Mexico and western Atlantic, according to the NOAA State Climate Summary for Florida (NOAA State Climate Summary).

The same 2022 NOAA summary says Florida experiences the highest annual number of thunderstorms in the United States and that hurricane-force winds strike the state an average of 3 times every 5 years (NOAA). The Florida climate zones guide compares the Panhandle, the central peninsula, South Florida and the Keys.

The Florida geography section holds eight statewide guides, mapped below to the question each answers, with the key Florida fact from the official sources on this page.