| Climber Name | # Ascents Recorded | Notes |
|---|---|---|
| Jindrich Sustr | 1 | |
| Jo Allen | 1 | |
| Joe Brooks | 1 | |
| Joe Brown | 1 |
The younger of the Joe Browns, not to be confused with the older prolific first ascensionist of the 1950s onwards. |
| Joe Fitschen | 1 | |
| Joe Heeley | 1 | |
| Joel Brady | 1 | |
| Joe Meiners | 1 | |
| Joe Paulus | 1 | |
| Joe Simpson | 1 |
References[1] Simpson, Joe., Colwell, Tony. Touching the Void. Ireland: BookBaby, 2012. [2] Simpson, Joe. This Game of Ghosts. United Kingdom: Vintage, 1994. [3] Simpson, Joe. Dark Shadows Falling. United Kingdom: Vintage, 1998. [4] Simpson, Joe. The Beckoning Silence. United States: Mountaineers Books, 2003. |
| Joe Terravecchia | 1 | |
| Joe Walmsley | 1 | |
| Joe Wilson | 1 | |
| Johan Gyllensvärd | 1 | |
| John Amatt | 1 | |
| John Atkinson | 1 |
Lakeland shepherd and cooper credited with the first recorded recreational rock climb (in an upward direction) in England, in 1826 with his solo ascent of Pillar Rock via the 150m Old West Route (M). |
| John Barker | 1 | |
| John Bradbury | 1 | |
| John Codling | 1 | |
| John Cohee | 1 |