| Climber Name | # Ascents Recorded | Notes |
|---|---|---|
| Nigel Callender | 1 | |
| Nigel Poustie | 1 | |
| Nigel Prestidge | 1 | |
| Nigel Slater | 1 | |
| Nika Potapova | 1 | |
| Nils Siegel | 1 | |
| Noah Bigwood | 1 | |
| Noboru Takaishi | 1 | |
| Noel Odell | 1 | |
| Norman Hardie | 1 | |
| Norrie Muir | 1 |
References[1] https://www.glasgowtimes.co.uk/notice/17578448.norman-norrie-muir/ |
| Nyrie Dodd | 1 |
Rock climber and doctor from Adelaide. References |
| Oden Dillman | 1 | |
| Odin Sanson | 1 | |
| Ola Laitinen | 1 | |
| Oliver Hill | 1 | |
| Oliver Kuang | 1 | |
| Ollie Dreghorn | 1 | |
| Olli-Petteri Manni | 1 | |
| Omar Rose | 1 |