William Morris Musson Flintoft (20 March 1889 – 3 May 1951), commonly called Bill Flintoft, was an Australian rules football player with the Melbourne Football Club and the St Kilda Football Club in the Victorian Football League (VFL).
He played Victorian Premier Cricket for the Melbourne Cricket Club.
Flintoft also served in the First Australian Imperial Force in World War I.
In later life Flintoft was Mayor of Prahran, on the Committee of the Melbourne Cricket Club, and on the Board of the Melbourne Football Club, serving as president of the latter for three years.