United States Fourth Fleet

United States Fourth Fleet
Active1943–1945
2008–present
CountryUnited States of America
BranchUnited States Navy
TypeFleet Command
RoleDirect Fleet Operations
Part ofU.S. Naval Forces Southern Command
U.S. Southern Command (USSOUTHCOM)
Garrison/HQNaval Station Mayport
Commanders
Current
commander
Rear Admiral Carlos A. Sardiello

The U.S. Fourth Fleet is a United States Navy numbered fleet. It is the Naval Component Command of U.S. Southern Command (USSOUTHCOM). The Fourth Fleet is headquartered at Naval Station Mayport in Jacksonville, Florida. It is responsible for U.S. Navy ships, aircraft and submarines operating in the Caribbean Sea, and the Atlantic and Pacific Oceans around Central and South America.