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.

Born in York, Ellis made his professional debut with his hometown club York in 1986. He joined Castleford (Heritage No. 680) in 1989, where we won the Yorkshire Cup and Regal Trophy. He scored 97 tries in 175 appearances for Castleford, and earned three caps for Great Britain whilst playing for the club. After a brief spell in Australia with South Queensland Crushers, he returned to England and went on to play for Bradford Bulls, Halifax, Keighley Cougars and Hunslet before finishing his playing career at Doncaster Dragons. Ellis was appointed head coach at Doncaster in 1999 while still playing for the club, and remained in the role until his death in 2005.

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.^[6] Ellis was born to a large family; he was one of nine brothers and also had six sisters. He grew up in Fulford and attended Fulford School.^[7]

Ellis was appointed as head coach at Doncaster Dragons while still playing for the club. He continued to coach the team after his playing career ended, and was the longest-serving coach of any professional club at the time of his death in 2005.^[14]

Ellis worked as a plasterer during much of his rugby league career, and later also worked as a salesman.^[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.^[15] His funeral was held at York Minster, and was attended by over 1,000 people.^[16] He was survived by his wife, Melanie, and two daughters.^[15]