The U.S. Naval Forces Korea is a major shore command of the United States Navy that serves as the shore support agency for all U.S. naval activity in South Korea. Known by the initials "CNFK", an abbreviation of the address format of the unit ("Commander, U.S. Naval Forces Korea"), its headquarters are at Busan Naval Base, Busan.

CNFK is jointly under the command of the operational command of United States Pacific Fleet, responsible for the support of all U.S. naval forces on the Korean peninsula, and United States Forces Korea. CNFK is also CNIC's assigned Region Commander with administrative control over what are two naval installations in South Korea which are Fleet Activity Chinhae and Busan Naval Base. CNFK is commanded by a rear admiral (lower half) who serves as the Navy liaison to the Commander of the United States Forces Korea. In times of war, CNFK becomes a ground-based task force of United States Seventh Fleet. ^{[citation needed]}

U.S. Naval Forces, Korea, was established on 1 July 1957, with headquarters in Seoul. The command was created by the reorganization of the Naval Forces, Far East Command into the separate commands of Naval Forces Japan and Naval Forces Korea. Commander, Naval Forces Korea, assumed the following additional duties:

The principal mission of CNFK was acting as part of the United Nations Command. In this regard, the commander exercised command of U.S. Naval Forces assigned or attached, and operational control over the Republic of Korea Navy.

Rear Admiral Neil A. Koprowski assumed command of CNFK in June 2023.