2021 Inter-Provincial Cup
| Dates | 1 May – 30 June 2021 |
|---|---|
| Administrator(s) | Cricket Ireland |
| Cricket format | List A |
| Tournament format(s) | Double round-robin |
| Champions | Leinster Lightning (8th title) |
| Participants | 4 |
| Matches | 12 |
| Most runs | George Dockrell (364) |
| Most wickets | Barry McCarthy (17) |
The 2021 Inter-Provincial Cup was the ninth edition of the Inter-Provincial Cup, a List A cricket competition that took place in Ireland during 2021. It was the fifth edition of the competition to be played with List A status. The number of teams was increased from three to four, with Munster Reds playing in the tournament for the first time. On 25 March 2021, Cricket Ireland confirmed the fixtures for the tournament. On 9 April 2021, Cricket Ireland announced the revised fixtures for the tournament.
Leinster Lightning were the defending champions. Leinster Lightning retained their title, winning four of their six matches.