Jim Dymock (born 4 April 1972) is a professional rugby league coach who is the assistant coach of the Manly Sea Eagles in the National Rugby League (NRL) and a former professional rugby league footballer who played in the 1990s and 2000s.

A Tonga and Australia international, and New South Wales State of Origin representative five-eighth or lock, he played club football for Sydney's Western Suburbs Magpies, Canterbury-Bankstown Bulldogs and the Parramatta Eels, finishing his career in the Super League for the London Broncos.

He then embarked on a coaching career, becoming head coach of the Tongan national team. He spent the latter part of the 2011 NRL season as head coach of the Canterbury-Bankstown Bulldogs, and has been an assistant coach at the Sydney Roosters, Canterbury-Bankstown Bulldogs and the Cronulla-Sutherland Sharks in the NRL.

Dymock was born in Sydney, New South Wales, Australia on 4 April 1972. He is of Tongan descent.

He began playing rugby league as an Eastern Suburbs junior with Paddington Colts and then Woolloomooloo Warriors. He then switched to the South Sydney juniors competition. He played for Zetland Magpies alongside players such as Jim Serdaris and Terry Hill who went on to make First Grade also.

He represented South Sydney in their S.G. Ball and Jersey Flegg teams.

Dymock began his first-grade club career in the 1991 NSWRL season at the Western Suburbs Magpies, opposing Wally Lewis and scoring two tries in his debut. He played 31 times for the club, but was "glad to go" after troubles with his manager while at Wests.

In 1993, Dymock joined the Canterbury-Bankstown Bulldogs.