| Birth Place: | Amsterdam, the Netherlands |
| Height: | 1.68m (05.51feet) |
| Weight: | 62kg (137lb) |
| Sport: | Swimming |
| Club: | HDZ, Amsterdam |
| Show-Medals: | yes |
Catharina Clasina "Rini" Dobber (born 1 January 1943) is a retired Dutch swimmer. She competed at the 1960 Summer Olympics in the 100 m backstroke, but failed to reach the final. Dobber set three national backstroke records in 1959–1960.