Wilfred "Willie Boy" Johnson (September 29, 1935 – August 29, 1988) was a United States (FBI) Federal Bureau of Investigation 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 Gambino crime boss John Gotti even though Johnson was informing on him.