Sir John Wyndham Beynon, 1st Baronet, CBE (2 December 1864 – 13 October 1944) was a Welsh iron and steel manufacturer and coal owner. Beynon was born in Castleton, Monmouthshire. He was educated at Clifton College, after which he went into business and eventually became chairman and managing director of the Ebbw Vale Steel Iron and Coal Company, as well as being a director of a number of other iron, steel and coal concerns. He was also chairman of the South Wales Coal Owners' Association.