Roysyn (foaled 24 October 1992) is a Thoroughbred racehorse who won the New Zealand Derby in 1995, giving trainer Roger James his first of three Derby wins and rider Vinny Colgan the first of his four. After failing in his only start at two, Roysyn started off his three-year-old season with a win in a maiden at Avondale. He followed that up with a placing and another win in low-quality races before finishing only sixth in the Avondale Guineas, his last race before the Derby.