The third USS Osceola (YT-129), previously USS YT-129, later YTB-129, later YTM-129, was a United States Navy harbor tug commissioned in 1938 and sold for scrapping in 1973. Harbor tug USS YT-129 was launched by the Charleston Navy Yard on 3 March 1938 and commissioned on 1 June 1938. She was assigned the name USS Osceola (YT-129) on 17 September 1938. After World War II, Osceola continued to provide her vital service to the United States Pacific Fleet. Her classification changed to medium harbor tug (YTM–129) in early 1962.