| Birth Date: | 1948 9, df=y |
| Birth Place: | Schiedam, the Netherlands |
| Height: | 1.89m (06.2feet) |
| Weight: | 82kg (181lb) |
| Sport: | Rowing |
| Club: | Nereus, Amsterdam |
| Headercolor: | lightsteelblue |
| Show-Medals: | yes |
Johannes Clemens Maria "Jan" van der Horst (born 1 September 1948) is a retired Dutch rower who won a bronze medal in the coxless pairs at the 1975 World Rowing Championships, together with Willem Boeschoten. They competed in this event at the 1976 Summer Olympics and finished in tenth place.