Nigel Twiston-Davies (born 16 May 1957) is a British racehorse trainer specialising in National Hunt racing. He is based at stables at Naunton, Gloucestershire.
He began training in 1981 and sent out his first winner, Last of the Foxes, at Hereford Racecourse in 1982.
He has trained over 1000 winners under National Hunt rules including two winners of the Grand National with Earth Summit in 1998 and Bindaree in 2002, and the winner of the 2010 Cheltenham Gold Cup with Imperial Commander. He also trained Imperial Commander to win the Ryanair Chase at the 2009 Cheltenham Festival.
His sons, Sam and William, both became jockeys. William retired in 2017.