| Jasper Diefenbach | |
| Nationality: | Dutch |
| Birth Date: | 17 March 1988 |
| Birth Place: | Dordrecht, Netherlands |
| Height: | 1.95 m |
| Weight: | 90 kg |
| Spike: | 345 cm |
| Block: | 330 cm |
| Position: | Middle blocker |
| Currentclub: | Volley-Ball Nantes |
| Teams: | VC Argex Duvel Puurs Euphony Asse Lennik Volley-Ball Nantes |
| Nationalyears: | 2014– |
| Nationalteam: | Netherlands |
Jasper Diefenbach (born 17 March 1988) is a Dutch male volleyball player. He is part of the Netherlands men's national volleyball team. On club level he plays for the Dutch club VVU.[1]