Nicky Henderson (born 10 December 1950) is a British racehorse trainer. He has been British jump racing Champion Trainer twice. Henderson has been a trainer since 1978, based at Seven Barrows in Lambourn, Berkshire.  Previously he was an amateur jockey, and assistant trainer to Fred Winter between 1974 and 1978.

His most notable successes have come with See You Then, winner of the Champion Hurdle in 1985, 1986 and 1987; and Remittance Man, winner of the Queen Mother Champion Chase in 1992. He was Champion Trainer in the 1985/86 and 1986/87 seasons. His record at the Cheltenham Festival is particularly good and no currently active trainer has won more races at the Festival than Henderson. His main stable jockey is Mick Fitzgerald.