Harry "Jersey" Flegg (6 April 1878 in Bolton, Lancashire – 23 August 1960 in North Sydney, New South Wales) was an English-Australian rugby league player and administrator, who was a leading figure in the birth of the sport in Australia.
He received his nickname 'Jersey' while still at school, after a meeting with the New South Wales (NSW) Governor of the time, Lord Jersey, who had bright red hair, similar to his own.
A front row forward with a reputation as a solid defender, he captained the side in its inaugural season, including the club's first match and the NSWRFL's first premiership decider against neighbouring Sydney club and traditional rival, South Sydney.
In 1909, Flegg was made a New South Wales and Australian selector and in 1929 he was appointed to the position of president of the NSWRFL.
His contribution to rugby league extended over half a century and during his tenure at the head of the game's administration, rugby league prospered, cementing itself as the dominant football code throughout the Australian states of New South Wales and Queensland.