St John Ellis (3 October 1964 – 31 December 2005), also known by the nickname of "Singe", was an English professional rugby league footballer and coach who played primarily as a winger.

St John Ellis was born in York on 3 October 1964, his forename was reportedly inspired after his mother saw a news presenter with the same name on television.

[8] Ellis played in Castleford's 11–8 victory over Wakefield Trinity in the 1990 Yorkshire Cup Final during the 1990–91 season at Elland Road, Leeds on Sunday 23 September 1990.

Ellis played in Castleford's 12–28 defeat by Wigan in the 1992 Challenge Cup Final during the 1991–92 season at Wembley Stadium, London on Saturday 2 May 1992, in front of a crowd of 77,386.

[12] In 1995, moved to Australia and joined the newly formed South Queensland Crushers, playing in their first ever league game against Canberra Raiders.

[7] On 31 December 2005, Ellis collapsed after a pre-season training session with Doncaster, and was pronounced dead on arrival at Pontefract Hospital.it is believed the cause of death was pulmonary arterial hypertension which is a rare condition that affects approx 1 in 1 million people.