Nicky Henderson (born 10 December 1950) is a British racehorse trainer. He has been British jump racing Champion Trainer four times.
His father was Johnny Henderson who was one of the founders of the Racecourse Holdings Trust as well as earlier in life being Aide-de-camp to Field Marshal Montgomery. In 2005 two years after Johnny Henderson's death Cheltenham renamed one of the races at the Cheltenham Festival in his honour as the Johnny Henderson Grand Annual Chase. In 2006 Nicky Henderson won this race with a horse called Greenhope.
Henderson, educated at Eton College, has been a trainer since 1978, based at Seven Barrows near 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; Remittance Man, winner of the Queen Mother Champion Chase in 1992; Punjabi, winner of the Smurfit Kappa Champion Hurdle in 2009 at the Cheltenham Festival, Binocular, winner of the 2010 Champion Hurdle, Long Run, winner of the 2011 Cheltenham Gold Cup and Bobs Worth, winner of the 2013 Cheltenham Gold Cup. Binocular's Champion Hurdle gave Henderson a fifth win in the race, equalling the record held by Peter Easterby. Zaynar, another horse he trained, also won at the 2009 Cheltenham Festival in the Triumph Hurdle. 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 was Mick Fitzgerald until Fitzgerald was forced to retire by an injury sustained in the 2008 Grand National; from the 2008-09 season until the 2014-15 season Barry Geraghty was Henderson's principal jockey in Britain. At the start of the 2015-16 season Nico de Boinville became Henderson's principal jockey after Geraghty replaced Tony McCoy as the principal jockey of JP Mcmanus.