Izaac Farrell (born 30 January 1998) is a professional rugby league footballer who plays as a scrum-half for Keighley Cougars in the RFL League 1. Izaac is a product of Huddersfield Giants' academy system and is the son of former Huddersfield, Sheffield, and Leeds player Anthony Farrell and the brother of current Sheffield Eagles player Joel Farrell
In 2017 he made his Challenge Cup début for the Huddersfield Giants against the Swinton Lions.
In 2018 he joined the Batley Bulldogs in the Championship on a season long loan.
He made his Super League debut for the Giants in February 2019.
In 2020, Farrell joined his brother Joel at Sheffield Eagles.
Farrell made two appearances on loan for Keighley Cougars in the RFL League 1 on loan during the 2024 season On 15 October 2024 he signed for a two-year deal with the club.
He made his debut for in the defeat to in October 2024 at Gateshead.
Born in England, Farrell is of Jamaican, Trinidadian and Scottish descent.