The St. Johns River (Spanish: Río San Juan) is the longest river in the U.S. state of Florida and is the most significant one for commercial and recreational use. [note 1] At 310 miles (500 km) long, it flows north and winds through or borders 12 counties.

The St. Johns River (Spanish: Río San Juan) is the longest river in the U.S. state of Florida and its most significant one for commercial and recreational use. At 310 miles (500 km) long, it flows north and winds through or borders twelve counties.

The marine chart shows depth and hydrology of Saint Johns River (FL) on the map. It flows through the following states: Florida 8840 basin size ( sq mi )

Interactive map of St. Johns River that includes Marina Locations, Boat Ramps. Access other maps for various points of interests and businesses.

Saint Johns River, navigable stream of northeastern Florida, U.S., the longest river in the state. It rises in swamps in Brevard county southwest of Melbourne , in the east-central part of the state and flows north parallel to the Atlantic coast until it turns at Jacksonville to empty into the ocean, 15 miles (25 km) to the east, after a course ...

Jul 5, 2022 · St. Johns River is about 500 km long, making it the longest river in Florida, United States. Approximately 3.5 million people live along the river and its watersheds. The river flows through 12 counties in the state, starting from the northeastern part …

Feb 5, 2025 · The St. Johns River (officially Saint Johns River, but commonly spelled St. John's River) is the longest river in the U.S. state of Florida, stretching 310 miles (500 km) from Indian River County to the Atlantic Ocean in Duval County.

At just over 300 miles from its headwaters in the Upper Basin marsh to its mouth northeast of Jacksonville, the St. Johns is Florida’s longest river entirely within its borders.