The St. Johns River is the longest river in Florida.

The St. Johns River is a significant waterway in the state of Florida, United States. It is the longest river in the state, stretching approximately 500 kilometers from its headwaters in Indian River County to its mouth in Duval County, where it flows into the Atlantic Ocean near Jacksonville.

The river holds great ecological, historical, and economic importance for the region. It is a vital water resource and provides drinking water for millions of people in the surrounding areas. The St. Johns River Basin covers a vast area of central and northeastern Florida, encompassing diverse habitats such as wetlands, swamps, marshes, and estuaries.

The St. Johns River has a rich history that dates back thousands of years. It was of great significance to Native American tribes, including the Timucua and Seminole, who relied on its resources for sustenance and transportation. European explorers, such as Jean Ribault and René Goulaine de Laudonnière, ventured along the river in the 16th century.

Over the centuries, the river has been a lifeline for trade and transportation. Steamboats were once a common sight, carrying goods and passengers along the river, contributing to the economic growth of the region. Today, the St. Johns River remains navigable and is used for recreational boating, fishing, and water-based activities.