William T. Nelson (1908–94) was a Rear Admiral in the United States Navy.
Nelson was born in Fall River, Massachusetts on October 15, 1908. He authored a book entitled "Fresh Water Submarines: The Manitowoc Story" about the submarines built by the Manitowoc Shipbuilding Company in Manitowoc, Wisconsin. He died in Falls Church, Virginia on September 11, 1994.
Nelson graduated from the United States Naval Academy in 1930. During World War II he commanded the USS R-7, USS Peto (SS-265), and USS Lamprey (SS-372). He retired in 1965.