| Climber Name | # Ascents Recorded | Notes |
|---|---|---|
| Jenya Kazbekova | 1 | |
| Jeremy Fullerton | 1 | |
| Jeremy Smith | 1 | |
| Jérôme Jean-Charles | 1 | |
| Jessica Mccaskey | 1 | |
| J. F. Hamilton | 1 | |
| Jim Burton | 1 | |
| Jim Merli | 1 | |
| Jim Sandford | 1 | References[1] Free Will: The Climbing Life of Jim Sandford by David Smart, Gripped 2021 https://gripped.com/profiles/free-will-the-climbing-life-of-jim-sandford/ |
| Jindrich Sustr | 1 | |
| Jo Allen | 1 | |
| Jochen Perschmann | 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 | |
| Joel Brady | 1 | |
| Joe Meiners | 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 Walmsley | 1 | |
| Joe Wilson | 1 |