Jersey Flegg Cup
| Current season, competition or edition: 2026 NSWRL Major Competitions | |
| Sport | Rugby league |
|---|---|
| First season | 1961 |
| Owner | NSWRL |
| CEO | David Trodden |
| No. of teams | 14 |
| Countries | Australia, New Zealand, Fiji |
| Most recent champion | Melbourne Storm (2025) |
| Most titles | Canterbury-Bankstown Bulldogs (11 titles) |
| Related competitions | NRL Under-20s Hastings Deering Colts |
| Official website | Jersey Flegg |
The Jersey Flegg Cup is a junior rugby league competition played in New South Wales, Australia, contested among teams made up of players aged 21 or under. The competition is administered by the New South Wales Rugby League (NSWRL), and is named for Eastern Suburbs foundation player and prominent administrator of the game, Harry "Jersey" Flegg.