# List of Welsh records in swimming

Welsh records in swimming are ratified by Wales' governing body in swimming, Swim Wales. Records can be set in long course (50 metres) or short course (25 metres) swimming pools, with records currently recorded in the following events for both men and women.
* Freestyle: 50 m, 100 m, 200 m, 400 m, 800 m, 1500 m
* Backstroke: 50 m, 100 m, 200 m
* Breaststroke: 50 m, 100 m, 200 m
* Butterfly: 50 m, 100 m, 200 m
* Individual medley: 100 m (short course only), 200 m, 400 m
* Relays: 4 × 100 m freestyle, 4 × 200 m freestyle, 4 × 100 m medley
Records can be set at intermediate distances in an individual race and for the first leg of a relay race.
Records which have not yet been fully ratified are marked with a '#' symbol in these lists, and all records were achieved in finals unless otherwise noted.

## Long Course (50 m)
### Men

| Event | Time | Name | Club | Date | Meet | Location |
| 50 m freestyle | 21.83 | Matthew Richards | Millfield | 6 April 2024 | British Championships | London, United Kingdom |
| 100 m freestyle | | | | |
| 200 m freestyle | | | | |
| 400 m freestyle | | | | |
| 800 m freestyle | | | | |
| 1500 m freestyle | | | | |
| 50 m backstroke | | | | |
| 100 m backstroke | | | | |
| 200 m backstroke | | | | |
| 50 m breaststroke | | | | |
| 100 m breaststroke | | | | |
| 200 m breaststroke | | | | |
| 50 m butterfly | | | | |
| 100 m butterfly | | | | |
| 200 m butterfly | | | | |
| 200 m individual medley | | | | |
| 400 m individual medley | | | | |
| 4×100 m freestyle relay | | | | | |
| 4×200 m freestyle relay | | | | | |
| 4×100 m medley relay | | | | | |

### Women

* Event
* 50 m freestyle
* 100 m freestyle
* 200 m freestyle
* 400 m freestyle
* 800 m freestyle
* 1500 m freestyle
* 50 m backstroke
* 100 m backstroke
* 200 m backstroke
* 50 m breaststroke
* 100 m breaststroke
* 200 m breaststroke
* 50 m butterfly
* 100 m butterfly
* 200 m butterfly
* 200 m individual medley
* 400 m individual medley
* 4×100 m freestyle relay
* 4×200 m freestyle relay
* 4×100 m medley relay

## Short Course (25 m)
### Men

| Event | Time | | Name | Club | Date | Meet | Location |
| 50 m freestyle | | | | | |
| 100 m freestyle | | | | | |
| 200 m freestyle | | | | | |
| 400 m freestyle | | | | | |
| 800 m freestyle | | | | | |
| 1500 m freestyle | | | | | |
| 50 m backstroke | | | | | |
| 100 m backstroke | | | | | |
| 200 m backstroke | | | | | |
| 50 m breaststroke | 27.37 | † | Lewis Fraser | Swansea University | 28 October 2023 | Neath ASC Open Meet | Swansea, United Kingdom |
| 100 m breaststroke | 58.79 | | Lewis Fraser | Swansea University | 28 October 2023 | Neath ASC Open Meet | Swansea, United Kingdom |
| 200 m breaststroke | | | | | |
| 50 m butterfly | 22.94 | | Lewis Fraser | Swansea University | 20 November 2022 | British Universities & Colleges (BUCS) Championships | Sheffield, United Kingdom |
| 100 m butterfly | | | | | |
| 200 m butterfly | | | | | |
| 100 m individual medley | | | | | |
| 200 m individual medley | | | | | |
| 400 m individual medley | | | | | |
| 4×100 m freestyle relay | | | | | | |
| 4×200 m freestyle relay | | | | | | |
| 4×100 m medley relay | | | | | | |

### Women

* Event
* 50 m freestyle
* 100 m freestyle
* 200 m freestyle
* 400 m freestyle
* 800 m freestyle
* 1500 m freestyle
* 50 m backstroke
* 100 m backstroke
* 200 m backstroke
* 50 m breaststroke
* 100 m breaststroke
* 200 m breaststroke
* 50 m butterfly
* 100 m butterfly
* 200 m butterfly
* 100 m individual medley
* 200 m individual medley
* 400 m individual medley
* 4×100 m freestyle relay
* 4×200 m freestyle relay
* 4×100 m medley relay