Jake Thewlis (born 24 May 2005) is a professional rugby league footballer who plays as a er for the Castleford Tigers in the Super League, on a one-month loan from the Warrington Wolves.
He has spent time on loan from Warrington at the North Wales Crusaders in League 1, at the London Broncos in the Championship, and at the Salford Red Devils in the Super League.
Thewlis was born in Grasscroft, Oldham, Greater Manchester, England. He was educated at St Edwards' Primary, Lees, and St Damian's RC Science College.
Thewlis played for the Waterhead Warriors and the Saddleworth Rangers as a junior. He played for Lancashire in the Academy Origin series.
He is of Irish heritage.
His brother Josh Thewlis is a fellow Warrington Wolves player.
Thewlis was Warrington's reserves player of the year in 2023, as well as playing in that year's academy Grand Final against St Helens.
In 2024, Thewlis made his debut for the Wire in the Super League against the Wigan Warriors.
On 30 March 2026, Castleford Tigers announced the arrival of Thewlis on a one-month loan deal, with parent club Warrington holding a recall option.