| Personal information | |
|---|---|
| Nationality | Dutch |
| Born | 22 January 1886 Amsterdam, Netherlands |
| Died | 18 April 1936 (aged 50) Amsterdam, Netherlands |
| Sport | |
| Sport | Wrestling |
Jaap Belmer (22 January 1886 – 18 April 1936) was a Dutch wrestler. He competed in the men's Greco-Roman middleweight at the 1908 Summer Olympics. After defeating Wilhelm Grundmann from Germany, he went on to finish in fifth place in the tournament.