William Alfred Silto (1 May 1883 – after 1919) was an English footballer who played at centre half. He played in the Football League for Barnsley and in the Southern League for Swindon Town. After injury caused a £1000 transfer to Aston Villa to fall through, Silto joined Swindon during the summer of 1909, after being released by Barnsley, who suspected he was injury-prone. Had the transfer gone through he would have been the first British football player to have been sold for more than £1000. He went on to make well over 200 appearances for Swindon over the following eleven years - and without the interruption of the First World War, it would have been far more.