Wilfred "Willie Boy" Johnson (September 29, 1935 – August 29, 1988) was an American mobster and a Federal Bureau of Investigation (FBI) informant from 1966 to 1985. He provided the FBI, who code-named him "Wahoo" because of his Native American heritage, with information relating to John Gotti and other members of the Gambino family. Johnson was a friend of a Gambino crime boss, John Gotti.