John Leeper Dunlop OBE (10 July 1939 – 7 July 2018) was an English race horse trainer based in Arundel, Sussex. He trained the winners of 74 Group One races, including 10 British Classics, with over 3000 winners in total. He was the British flat racing Champion Trainer in 1995. Born in Tetbury, he first took out a training licence in 1966. After a two-year apprenticeship with Neville Dent and Gordon Smyth he took over Castle Stables in Arundel, on the Duke of Norfolk's estate. Dunlop was appointed OBE in the 1996 Birthday Honours. He was also a trustee of the British Racing School.