John Barnard Bush CVO OBE KStJ (born 5 February 1937) is an English farmer and landowner. He was a Justice of the Peace, a High Sheriff of Wiltshire, and finally Lord Lieutenant of Wiltshire from 2004 to 2012. As non-executive chairman of West Midland Farmers Association Ltd, an agricultural co-operative, he oversaw its conversion into Countrywide Farmers PLC.