William Ryder (born 6 June 1982) is a Fijian rugby union footballer. Ryder is well known within the rugby sevens community, as he has produced some of the best performances for the Fiji national sevens side. He is well known for his try scoring capability and goosestepping defenders. He was also one of the top try scorers of the World Sevens Series which has been overtaken recently. He has scored over 750 points to-date of which he has scored 105 tries. He was a part of the team that won the sevens world cup in 2005 and also won a bronze medal at the 2006 Commonwealth Games in Melbourne, Australia for the rugby sevens event.