Alfred "Alf" Peacock (7 February 1891 – death unknown) was an English professional rugby league footballer who played in the 1900s, 1910s and 1920s. He played at representative level for England and Lancashire, and at club level for Runcorn RFC and Warrington (Heritage № 237), initially as a forward (prior to the specialist positions of; prop, hooker, second-row, loose forward), and then as a specialist hooker, i.e. number 9, during the era of contested scrums.