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
Ref
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
Legend: # – Record awaiting ratification by Swim Wales;WR – World record;ER – European record;CR – Commonwealth record; Records not set in finals: h – heat;sf – semifinal;r – relay 1st leg;rh – relay heat 1st leg;b – B final;† – en route to final mark;tt – time trial
Women
Event
Time
Name
Club
Date
Meet
Location
Ref
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
Legend: # – Record awaiting ratification by Swim Wales;WR – World record;ER – European record;CR – Commonwealth record; Records not set in finals: h – heat;sf – semifinal;r – relay 1st leg;rh – relay heat 1st leg;b – B final;† – en route to final mark;tt – time trial
Legend: # – Record awaiting ratification by Swim Wales;WR – World record;ER – European record;CR – Commonwealth record; Records not set in finals: h – heat;sf – semifinal;r – relay 1st leg;rh – relay heat 1st leg;b – B final;† – en route to final mark;tt – time trial
Women
Event
Time
Name
Club
Date
Meet
Location
Ref
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
Legend: # – Record awaiting ratification by Swim Wales;WR – World record;ER – European record;CR – Commonwealth record; Records not set in finals: h – heat;sf – semifinal;r – relay 1st leg;rh – relay heat 1st leg;b – B final;† – en route to final mark;tt – time trial