These records will be frozen as of 31st March 2026 due to the introduction of new age groups from 1st April 2026. They will no longer be updated.
| Under 13 | (Age 11 or 12 on 31st August, competition year 1st October to 30th September) |
| Event | Performance | Athlete | Date | Venue | Standard | ||
| 60m indoor | 9.10 sec | Sam Fortnam | 08/01/2023 | Cardiff | |||
| 75m | 10.10 sec | Troy Turner | 03/06/2023 | Yate | L7 | ||
| 10.1 sec | Troy Turner | 08/07/2023 | Neath | L7 | |||
| 100m | 12.5 sec | Troy Turner | 25/06/2023 | Yate | L9 | ||
| 100m indoor | 15.12 sec | Sulaiman Ouiles | 19/03/2017 | Birmingham PB | |||
| 150m | 19.8 sec | Troy Turner | 08/07/2023 | Neath | L8 | ||
| 19.02 w3.1 | Troy Turner | 22/07/2023 | Yate | L9 | |||
| 150m indoor | 19.01 sec | Troy Turner | 09/12/2023 | Sheffield | L9 | ||
| 200m | 25.5 sec | Troy Turner | 05/07/2023 | Gloucester | L9 | ||
| 200m indoor | 29.30 sec | Richard Farrow | 23/11/2002 | Cardiff | 4 | ||
| 300m | 46.7 sec | Richard Farrow | 13/08/2002 | Worcester | - | UK age11 BP | |
| 14/08/2002 | Birmingham | ||||||
| 400m | 62.39 sec | Luke Hill | 04/09/2011 | Yate | - | ||
| 400m indoor | 61.91 sec | Ben Coldray | 31/01/2004 | Birmingham | - | UK BP | |
| 600m | 1,42.2 min | Ben Coldray | 12/08/2003 | Worcester | - | ||
| 600m indoor | 1,45.0 min + e # | Richard Farrow | 23/02/2003 | Birmingham | - | UK BP | |
| 800m | 2,15.7 min | Ben Coldray | 18/08/2004 | Watford | 1 | ||
| 800m indoor | 2,15.44 min | Ben Coldray | 15/02/2004 | Birmingham | 1 | UK BP* | |
| 1000m | 2,59.0 min | Ben Coldray | 14/09/2003 | High Wycombe | - | UK 6th | |
| UK age11 BP | |||||||
| 1200m | 3,53.06 min | Toby Brooks | 14/09/2025 | Yate | L7 | ||
| 1500m | 4,31.18 min | Ben Coldray | 06/07/2004 | Manchester, Stretford | 1 | UK 13th | |
| 1500m indoor | 4,44.11 min mx # | Ben Coldray | 07/12/2003 | Cardiff | 1 | UK BP | |
| 4,46.29 min | 04/01/2004 | Cardiff | 1 | UK BP | |||
| 1 mile | 5,10.0 min mx | Ben Coldray | 26/08/2003 | Nottingham | - | UK age11 BP | |
| 3000m | 10,20.5 min | Alex Felce | 28/08/1999 | Gloucester | |||
| 2 miles | 12,11 min | Paul Morgan | 20/09/1983 | Gloucester | - | ||
| 60m H indoor (76.2cm) | 10.6 sec | Sulaiman Ouiles | 19/03/2017 | Birmingham PB | |||
| 75m H* (76.2cm) | 13.6 sec | Sulaiman Ouiles | 05/07/2017 | Cheltenham | 3 | ||
| 75m H indoor (76.2cm) | 13.99 sec | Sulaiman Ouiles | 19/03/2017 | Birmingham PB | 3 | ||
| 80m H (76.2cm) | 16.6 sec | Liam Harding | 14/08/2005 | Yate | 4 | ||
| 4x100m relay | 54.44 sec | Troy Turner, Sam Fortnam, Jacob Andrews, Callum Yates | 03/06/2023 | Yate | - | ||
| 54.5 sec | 08/07/2023 | Neath | - | ||||
| 4x100m mixed relay | 55.8 sec | Troy Turner, Emmi Huitson, Jacob Andrews, Amari Cambridge | 06/08/2023 | Gloucester | - | ||
| 4x200m relay | 1,59.9 min | Stephen Pukas, Scott Bird, A Mirfin, Jonathan Day | __-09-1983 | Cwmbran | - | ||
| 4x400m relay | 4,51.5 min | Lewis Drewett, Joe Langbridge, Samuel Earl, Lewis Nicholls | 21/08/2013 | Gloucester | - | 4,50.0 1982 county champs | |
| 1600m medley relay | 4,55.8 min | Martin Seville, Mark Bowers, Clive Harris, Mark Kelly | 12/08/1986 | Cheltenham | - | ||
| 3x800m relay | 7,57.6 min | Paul Holford, Jason Webb, John Leccacorvi | 05/09/1982 | Cwmbran | - | ||
| High Jump | 1.45 m | Sam Fortnam | 03/06/2023 | Yate | L8 | ||
| Owen Wood | 29/06/2025 | Yate | L8 | ||||
| High Jump indoor | 1.49 m | Sam Fortnam | 03/12/2023 | Cardiff | L8 | ||
| Pole Vault | 1.90 m | Sulaiman Ouiles | 26/07/2017 | Cheltenham | - | ||
| Long Jump | 4.68 m | George James | 05/06/2011 | Cheltenham | 2 | ||
| Long Jump indoor | 4.06 m | Sam Fortnam | 07/01/2024 | Cardiff | L5 | ||
| Triple jump | 9.56 m | Phil Ennis | 06/09/1987 | Swindon | |||
| Shot (3kg)* (01/04/2018 on) | 9.71 m | William Richards-Baldwin | 21/09/2021 | Aberdare | 1 | ||
| Shot (3.25kg) | 8.62 m | Laurence Leat | 19/07/2009 | Yate | 2 | ||
| Shot indoor (3kg)* (01/04/2018 on) | 6.75 m | Jacob Holloway | 01/12/2024 | Cardiff | L2 | ||
| Shot indoor (3.25kg) | 5.50m | Sulaiman Ouiles | 12/02/2017 | Birmingham | |||
| Discus (1kg)* | 24.56 m | Lyndon Medcroft | 04/08/1985 | Cheltenham | |||
| Discus (1.25kg) | 19.74 m | Lyndon Medcroft | 02/06/1985 | Leamington | |||
| Hammer (3kg)* | 28.85 m | Jimmy Coleman | 17/09/2005 | Gloucester | - | ||
| Javelin (400g)* | 31.09 m | Archie Hogan | 02/07/2025 | Gloucester | L7 | ||
| Javelin (600g) | 18.23 m | Sulaiman Ouiles | 07/06/2017 | Basingstoke | |||
| Pentathlon | 1416 points | Theo Myles | 26/09/2021 | Stretford | |||