| 1983 All-Ireland Under-21 Football Championship | |
| Bodyclass: | vevent |
| Headerstyle: | background:#BFD7FF; |
| Labelstyle: | white-space: nowrap |
| Datastyle: | white-space: nowrap |
| Header1: | Championship details |
| Label2: | Dates |
| Label3: | Teams |
| Header4: | All-Ireland Champions |
| Label5: | Winning team |
| Data5: | Mayo (3rd win) |
| Label6: | Captain |
| Data6: | Eddie Gibbons |
| Label7: | Manager |
| Header8: | All-Ireland Finalists |
| Label9: | Losing team |
| Data9: | Derry |
| Label10: | Captain |
| Label11: | Manager |
| Header12: | Provincial Champions |
| Label13: | Munster |
| Data13: | Kerry |
| Label14: | Leinster |
| Data14: | Kildare |
| Label15: | Ulster |
| Data15: | Derry |
| Label16: | Connacht |
| Data16: | Mayo |
The 1983 All-Ireland Under-21 Football Championship was the 20th staging of the All-Ireland Under-21 Football Championship since its establishment by the Gaelic Athletic Association in 1964.
Donegal entered the championship as defending champions, however, they were defeated by Derry in the Ulster final.
On 30 October 1983, Mayo won the championship following a 1-8 to 1-5 defeat of Derry in a replay of the All-Ireland final.[1] This was their third All-Ireland title overall and their first title in nine championship seasons.
Semi-finals
Finals