Two ships of the United States Navy have borne the name Callaghan, in honor of Rear Admiral Daniel J. Callaghan.

• USS Callaghan (DD-792), was a Fletcher-class destroyer, launched in 1943 and sunk during the Battle of Okinawa in 1945.
• USS Callaghan (DDG-994), was a Kidd-class guided missile destroyer, launched in 1979 and struck in 1998.

•  This article incorporates text from the public domain Dictionary of American Naval Fighting Ships. The entry can be found here.
•  This article includes information collected from the Naval Vessel Register, which, as a U.S. government publication, is in the public domain. The entry can be found here.