| Birth Date: | 24 July 1917 |
| Birth Place: | Buitenzorg, Dutch East Indies |
| Death Place: | The Hague, Netherlands |
| Sport: | Water polo |
Rudolf den Hamer (July 24, 1917 – March 14, 1988) was a Dutch water polo player who competed in the 1936 Summer Olympics. He was part of the Dutch team which finished fifth in the 1936 tournament. He played four matches.[1]