| Jens Peter Berthelsen | |
| Birth Date: | 15 December 1854 |
| Birth Place: | Hillerød, Denmark |
| Death Place: | Copenhagen, Denmark |
| Sport: | Fencing |
| Club: | Københavns Fægteklub |
| Show-Medals: | yes |
Jens Peter Berthelsen (15 December 1854 – 26 July 1934) was a Danish fencer. He competed in the individual foil masters event at the 1900 Summer Olympics.[1]
His son Jens Berthelsen was also a fencer.