| Rob van Mesdag | |
| Birth Date: | 1930 1, df=y |
| Birth Place: | Hilversum, the Netherlands |
| Death Date: | [1] |
| Sport: | Rowing |
| Club: | Tromp, Hilversum |
| Show-Medals: | yes |
Robbert Hendrik van Mesdag (18 January 1930 - 18 July 2018) was a Dutch rower who won a bronze medal in the single sculls at the 1955 European Rowing Championships. He competed in this event at the 1952 Summer Olympics, but failed to reach the final.