Mosquito Lagoon, Coastal lagoon system in eastern Florida, United States

Mosquito Lagoon is a shallow lagoon on Florida's Atlantic coast, running from Ponce de Leon Inlet south to the northern end of Merritt Island in Brevard and Volusia counties. It connects to the Indian River through the Haulover Canal and forms part of the Indian River Lagoon system and the Atlantic Intracoastal Waterway. Its water level depends more on wind than on lunar tides.

Confederate soldiers used Shipyard Island in the lagoon to repair damaged vessels during the Civil War, and Orange Island once held a very large plantation. During Prohibition, bootleggers smuggled whisky and spirits through the heart of the lagoon to evade law enforcement. In December 2005, Winter, the bottlenose dolphin fitted with a prosthetic tail, was rescued here.

Shipyard Island in the lagoon was used by Confederate soldiers to repair damaged ships during the Civil War, and Orange Island once held a very large plantation. During Prohibition, bootleggers smuggled whisky and spirits through the heart of the lagoon to evade law enforcement.

The lagoon has almost no measurable tides; water levels depend more on wind strength than on the moon, so shallow flats can empty or flood with a shift in wind. The Haulover Canal links it to the Indian River, and boat ramps and fishing areas lie near Edgewater and New Smyrna Beach.

Shipyard Island in the lagoon served as a repair site for damaged Confederate vessels during the American Civil War, and Orange Island once held a very large plantation. During Prohibition, bootleggers ran whisky and spirits through the heart of the lagoon to avoid law enforcement checks.