| Birth Date: | 1947 11, df=y |
| Birth Place: | Willemstad, Curaçao |
| Height: | 1.7m (05.6feet) |
| Weight: | 58kg (128lb) |
| Sport: | Swimming |
| Club: | ADZ, Amsterdam |
| Show-Medals: | yes |
Petronella Johanna Maria "Nel" Bos (born 23 November 1947) is a retired swimmer from the Netherlands. She competed at the 1968 Summer Olympics in the 100 m freestyle, 100 m butterfly, freestyle relay and medley relay and finished in seventh place in the last event.