Jan Janssen (1879)
- Category : 1879-births
- Type : PE
- Profile : 3/5 - Martyr / Heretic
- Definition : Split - Small (36,45)
- Incarnation Cross : RAX Consciousness 4
Dutch gymnast who competed in the 1908 Summer Olympics.
As part of the Dutch gymnastics team that finished in 7th place he finished 60th in the individual all-around competition.
He was the older brother of Dirk Janssen. He died in Haarlem, Netherlands, on 24 May 1953.