Jimmy "Gentleman Jim" Lewthwaite (10 November 1920 – 23 December 2006), born in Broughton Road, Cleator Moor, Cumberland, was a rugby league Wing for Great Britain, England, Cumberland and Barrow.
With Barrow he scored a club record 351 tries and kicked 20 goals in exactly 500 appearances from 1943–57. He scored 50 tries in his last season, 1956–57, another club record. He retired after Barrow's Rugby League Challenge Cup Final defeat by Leeds in 1957, one of three Wembley appearances he made with the Cumbrian club during that decade.
Lewthwaite's Testimonial match at Barrow took place in 1956.
He was inducted into the club's Hall of Fame when it was launched in 2001, alongside 1950s teammates Phil Jackson and Willie Horne.
On the international front he travelled to Australasia with Great Britain in 1946 – the famous "Indomitables" tour, named after the vessel on which they sailed, HMS Indomitable. He top-scored with 25 tries on that tour despite not making the Test team. He also won one England cap.
Jimmy Lewthwaite represented Cumberland.