William Henry Ashdown (27 December 1898 – 15 September 1979) was an English professional cricketer. He is one of a very few men who played first-class cricket before the First World War and after the Second World War. Ashdown was born in Bromley in Kent. He first played first-class cricket in 1914, playing for Gerry Weigall's XI against Oxford University in The Parks, aged 15. During World War I he served in a reserve battalion of the Rifle Brigade on home defence duties.