| Lorna Tonks | |
| Fullname: | Lorna Tonks |
| Strokes: | Breaststroke |
| Club: | Yeronga Park |
| Coach: | Rob Van Der Zant |
| Birth Date: | 8 December 1988 |
| Birth Place: | Nottinghamshire, England |
| Height: | 1.69m (05.54feet) |
| Weight: | 600NaN0 |
Lorna Tonks (born 8 December 1988) is an English-born Australian breaststroke swimmer. In 2014, she was a member of the 4×100-metre medley teams that won gold medals at the Commonwealth Games and Pan Pacific Championships.