The Seventh Fleet is the United States Navy's permanent forward projection force operating forward deployed in Yokosuka, Japan, with units positioned near Japan and South Korea. It is a component force of the United States Pacific Fleet. At present, it is the largest of the forward-deployed U.S. fleets, with 50 to 60 ships, 350 aircraft and 60,000 Navy and Marine Corps personnel. With the support of its Task Force Commanders, it has three major assignments:

The Seventh Fleet was formed on 15 March 1943 in Brisbane, Australia, during World War II, under the command of Admiral Arthur S. "Chips" Carpender. It served in the South West Pacific Area (SWPA) under General Douglas MacArthur, and the Seventh Fleet commander also served as commander of Allied naval forces in the SWPA.

Most of the ships of the Royal Australian Navy were also part of the fleet from 1943 to 1945 as part of Task Force 74 (formerly the Anzac Squadron). The Seventh Fleet—under Admiral Thomas C. Kinkaid—formed a large part of the Allied forces at the Battle of Leyte Gulf, the largest naval battle in history. After the end of the war, the 7th Fleet moved its headquarters to Qingdao, China.