The Irish records in swimming are ratified by Irelands's governing body in swimming, Swim Ireland. 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: 4×50 m freestyle (short course only), 4 × 100 m freestyle, 4 × 200 m freestyle, 4×50 m freestyle (short course only), 4 × 100 m medley
Long course (50 m)
Men
| Event | Time | Name | Club | Date | Meet | Location | Ref | |
|---|---|---|---|---|---|---|---|---|
| 50m freestyle | 21.74 | sf | Tom Fannon | Ireland | 1 August 2024 | Olympic Games | Paris, France | |
| 100m freestyle | 48.39 | sf | Shane Ryan | Ireland | 18 June 2024 | European Championships | Belgrade, Serbia | |
| 200m freestyle | 1:46.66 | rh, = | Jack McMillan | Ireland | 27 July 2021 | Olympic Games | Tokyo, Japan | |
| 200m freestyle | 1:46.66 | h, = | Evan Bailey | Ireland | 28 July 2025 | World Championships | Singapore, Singapore | |
| 400m freestyle | 3:44.35 | Daniel Wiffen | Loughborough University | 13 April 2023 | Swim Open Stockholm | Stockholm, Sweden | ||
| 800m freestyle | 7:38.19 | Daniel Wiffen | Ireland | 30 July 2024 | Olympic Games | Paris, France | ||
| 1500m freestyle | 14:34.07 | Daniel Wiffen | Ireland | 18 February 2024 | World Championships | Doha, Qatar | ||
| 50m backstroke | 24.32 | h | Shane Ryan | Ireland | 3 August 2018 | European Championships | Glasgow, United Kingdom | |
| 100m backstroke | 53.73 | Shane Ryan | National Centre Dublin | 30 March 2019 | Irish Championships | Dublin, Republic of Ireland | ||
| 200m backstroke | 1:56.19 | John Shortt | Ireland | 24 August 2025 | World Junior Championships | Otopeni, Romania | ||
| 50m breaststroke | 26.94 | h | Darragh Greene | Ireland | 23 July 2019 | World Championships | Gwangju, South Korea | |
| 100m breaststroke | 59.76 | h | Darragh Greene | Ncd Longford | 20 April 2021 | Irish National Team Trials | Dublin, Republic of Ireland | |
| 200m breaststroke | 2:10.05 | Darragh Greene | National Centre Dublin | 28 March 2019 | Irish Championships | Dublin, Republic of Ireland | ||
| 50m butterfly | 23.44 | Max McCusker | Dolphin | 20 April 2022 | Irish Championships | Dublin, Republic of Ireland | ||
| 100m butterfly | 51.90 | h | Max McCusker | Dolphin | 23 May 2024 | Irish Championships | Dublin, Republic of Ireland | |
| 200m butterfly | 1:56.55 | sf | Brendan Hyland | Ireland | 23 July 2019 | World Championships | Gwangju, South Korea | |
| 200m individual medley | 2:01.52 | Brendan Hyland | National Centre Dublin | 30 March 2019 | Irish Championships | Dublin, Republic of Ireland | ||
| 400m individual medley | 4:22.57 | Jack Cassin | NCL Dolphin | 2 April 2023 | Irish Championships | Dublin, Republic of Ireland | ||
| 4×50m freestyle relay | 1:34.41 |
| University College Dublin | 21 July 2016 | Portuguese Open Championships | Oeiras, Portugal | ||
| 4×100m freestyle relay | 3:16.88 | h |
| Ireland | 17 May 2021 | European Championships | Budapest, Hungary | |
| 4×200m freestyle relay | 7:12.00 |
| Ireland | 19 May 2021 | European Championships | Budapest, Hungary | ||
| 4×50m medley relay | 1:41.94 |
| University College Dublin | 23 July 2016 | Portuguese Open Championships | Oeiras, Portugal | ||
| 4×100m medley relay | 3:33.81 | h |
| Ireland | 3 August 2024 | Olympic Games | Paris, France |
Legend: # – Record awaiting ratification by Swim Ireland; WR – World record; ER – European record;
Records not set in finals: h – heat;
Records not set in finals: h – heat;
Women
| Event | Time | Name | Club | Date | Meet | Location | Ref | |
|---|---|---|---|---|---|---|---|---|
| 50m freestyle | 24.68 | sf | Danielle Hill | Larne | 25 May 2024 | Irish Championships | Dublin, Republic of Ireland | |
| 100m freestyle | 54.80 | Grace Davison | Ireland | 5 July 2025 | European Junior Championships | Šamorín, Slovakia | ||
| 200m freestyle | 1:58.88 | sf | Ellen Walshe | Templeogue | 15 April 2025 | Irish Championships | Dublin, Republic of Ireland | |
| 400m freestyle | 4:07.25 | Michelle Smith | Ireland | 22 July 1996 | Olympic Games | Atlanta, United States | ||
| 800m freestyle | 8:25.04 | Gráinne Murphy | Ireland | 12 August 2010 | European Championships | Budapest, Hungary | ||
| 1500m freestyle | 16:02.29 | Gráinne Murphy | Ireland | 14 August 2010 | European Championships | Budapest, Hungary | ||
| 50m backstroke | 27.64 | Danielle Hill | Larne | 4 May 2024 | Ulster Championships | Bangor, United Kingdom | ||
| 100m backstroke | 59.11 | sf | Danielle Hill | Larne | 22 May 2024 | Irish Championships | Dublin, Republic of Ireland | |
| 200m backstroke | 2:10.75 | Melanie Nocher | Ireland | 22 May 2012 | European Championships | Debrecen, Hungary | ||
| 50m breaststroke | 30.29 | Mona McSharry | Marlins | 3 April 2023 | Irish Championships | Dublin, Republic of Ireland | ||
| 100m breaststroke | 1:05.51 | sf | Mona McSharry | Ireland | 28 July 2024 | Olympic Games | Paris, France | |
| 200m breaststroke | 2:22.49 | h | Mona McSharry | Unattached Tennessee Aquatics | 22 June 2024 | Mel Zajac Jr. International Meet | Vancouver, Canada | |
| 50m butterfly | 26.45 | Danielle Hill | Larne | 12 April 2024 | McCullagh International Meet | Bangor, United Kingdom | ||
| 100m butterfly | 57.96 | Ellen Walshe | Templeogue | 1 April 2023 | Irish Championships | Dublin, Republic of Ireland | ||
| 200m butterfly | 2:07.48 | sf | Ellen Walshe | Ireland | 30 July 2025 | World Championships | Singapore, Singapore | |
| 200m individual medley | 2:10.49 | sf | Ellen Walshe | Ireland | 27 July 2025 | World Championships | Singapore, Singapore | |
| 400m individual medley | 4:35.32 | Ellen Walshe | Templeogue | 2 May 2025 | TYR Pro Swim Series | Fort Lauderdale, United States | ||
| 4×50m freestyle relay | 1:49.96 |
| Ards | 10 April 2016 | Swim Ulster | Bangor, United Kingdom | ||
| 4×100m freestyle relay | 3:41.75 | h |
| Ireland | 23 July 2023 | World Championships | Fukuoka, Japan | |
| 4×200m freestyle relay | 8:07.66 | h |
| Ireland | 28 July 2011 | World Championships | Shanghai, China | |
| 4×50m medley relay | 1:58.85 |
| Ards | 11 November 2017 | - | |||
| 4×100m medley relay | 4:00.12 | h |
| Ireland | 3 August 2024 | Olympic Games | Paris, France |
Legend: # – Record awaiting ratification by Swim Ireland; WR – World record; ER – European record;
Records not set in finals: h – heat;
Records not set in finals: h – heat;
Mixed relay
| Event | Time | Name | Club | Date | Meet | Location | Ref | |
|---|---|---|---|---|---|---|---|---|
| 4×50m freestyle relay | 1:39.52 |
| Ards | 21 July 2016 | Irish Age Group Championships | Dublin, Republic of Ireland | ||
| 4×100m freestyle relay | 3:33.06 | h |
| Ireland | 22 May 2021 | European Championships | Budapest, Hungary | |
| 4×200m freestyle relay | 7:50.41 |
| Ireland | 18 May 2021 | European Championships | Budapest, Hungary | ||
| 4×50m medley relay | 1:49.83 |
| Ireland | 9 September 2015 | ||||
| 4×100m medley relay | 3:49.08 | h |
| Ireland | 20 May 2021 | European Championships | Budapest, Hungary |
Legend: # – Record awaiting ratification by Swim Ireland;
Records not set in finals: h – heat
Records not set in finals: h – heat
Short course (25 m)
Men
| Event | Time | Name | Club | Date | Meet | Location | Ref | |
|---|---|---|---|---|---|---|---|---|
| 50m freestyle | 21.07 | h | Shane Ryan | Ireland | 14 December 2024 | World Championships | Budapest, Hungary | |
| 100m freestyle | 46.68 | r | Shane Ryan | Ncd Athlone | 12 December 2019 | Irish Championships | Dublin, Republic of Ireland | |
| 100m freestyle | 46.23 | h, # | Shane Ryan | Ireland | 11 December 2024 | World Championships | Budapest, Hungary | |
| 200m freestyle | 1:41.48 | Evan Bailey | Ireland | 4 December 2025 | European Championships | Lublin, Poland | ||
| 400m freestyle | 3:35.47 | Daniel Wiffen | Ireland | 5 December 2023 | European Championships | Otopeni, Romania | ||
| 800m freestyle | 7:20.46 | WR | Daniel Wiffen | Ireland | 10 December 2023 | European Championships | Otopeni, Romania | |
| 1500m freestyle | 14:09.11 | Daniel Wiffen | Ireland | 7 December 2023 | European Championships | Otopeni, Romania | ||
| 50m backstroke | 22.56 | Shane Ryan | Ireland | 13 December 2024 | World Championships | Budapest, Hungary | ||
| 100m backstroke | 50.10 | John Shortt | Ireland | 5 December 2025 | European Championships | Lublin, Poland | ||
| 200m backstroke | 1:47.89 | John Shortt | Ireland | 3 December 2025 | European Championships | Lublin, Poland | ||
| 50m breaststroke | 26.35 | Alexander Murphy | Ireland | 2 December 2015 | European Championships | Netanya, Israel | ||
| 100m breaststroke | 57.69 | h | Alexander Murphy | Ireland | 15 December 2017 | European Championships | Copenhagen, Denmark | |
| 200m breaststroke | 2:05.89 | sf | Eoin Corby | Ireland | 4 December 2025 | European Championships | Lublin, Poland | |
| 200m breaststroke | 2:05.76 | # | Eoin Corby | Limerick | 13 December 2025 | Irish Championships | Dublin, Republic of Ireland | |
| 50m butterfly | 22.80 | Shane Ryan | Toronto Titans | 10 November 2020 | International Swimming League | Budapest, Hungary | ||
| 100m butterfly | 50.53 | Shane Ryan | Toronto Titans | 24 October 2020 | International Swimming League | Budapest, Hungary | ||
| 200m butterfly | 1:53.19 | h, = | Brendan Hyland | Ireland | 11 December 2018 | World Championships | Hangzhou, China | |
| 200m butterfly | 1:53.19 | h, = | Jack Cassin | Ireland | 12 December 2024 | World Championships | Budapest, Hungary | |
| 100m individual medley | 53.09 | Jack McMillan | Bangor | 6 November 2021 | Ulster Championships | Belfast, United Kingdom | ||
| 200m individual medley | 1:56.74 | Brendan Hyland | Ncd Tallaght | 12 December 2019 | Irish Championships | Dublin, Republic of Ireland | ||
| 200m individual medley | 1:55.80 | # | John Shortt | Bluefin | 12 December 2025 | Irish Championships | Dublin, Republic of Ireland | |
| 400m individual medley | 4:11.05 | Daniel Wiffen | Loughborough | 9 December 2022 | Scottish Championships | Edinburgh, United Kingdom | ||
| 4×50m freestyle relay | 1:27.06 | h |
| Ireland | 4 December 2019 | European Championships | Glasgow, United Kingdom | |
| 4×100m freestyle relay | 3:10.19 |
| Ncd Athlone | 12 December 2019 | Irish Championships | Dublin, Republic of Ireland | ||
| 4×200m freestyle relay | 6:59.54 |
| Ireland | 19 December 2021 | World Championships | Abu Dhabi, United Arab Emirates | ||
| 4×50m medley relay | 1:34.14 | h |
| Ireland | 8 December 2019 | European Championships | Glasgow, United Kingdom | |
| 4×100m medley relay | 3:26.60 |
| Ncd Tallaght | 15 December 2019 | Irish Championships | Dublin, Republic of Ireland |
Legend: # – Record awaiting ratification by Swim Ireland; WR – World record; ER – European record;
Records not set in finals: h – heat;
Records not set in finals: h – heat;
Women
| Event | Time | Name | Club | Date | Meet | Location | Ref | |
|---|---|---|---|---|---|---|---|---|
| 50m freestyle | 24.00 | Danielle Hill | Larne | 16 December 2023 | Irish Winter Championships | Dublin, Republic of Ireland | ||
| 100m freestyle | 53.03 | Danielle Hill | Larne | 14 December 2023 | Irish Championships | Dublin, Republic of Ireland | ||
| 200m freestyle | 1:55.94 | sf | Victoria Catterson | Ireland | 9 December 2023 | European Championships | Otopeni, Romania | |
| 200m freestyle | 1:53.72 | # | Ellen Walshe | Templeogue | 13 December 2025 | Irish Championships | Dublin, Republic of Ireland | |
| 400m freestyle | 4:02.86 | Gráinne Murphy | Ireland | 27 November 2010 | European Championships | Eindhoven, Netherlands | ||
| 800m freestyle | 8:18.03 | Gráinne Murphy | Ireland | 17 December 2011 | Duel in the Pool | Atlanta, United States | ||
| 1500m freestyle | 16:32.73 | Antoinette Neamt | Tallaght | 14 December 2014 | Irish Championships | Lisburn, United Kingdom | ||
| 50m backstroke | 26.33 | Danielle Hill | Ireland | 8 December 2023 | European Championships | Otopeni, Romania | ||
| 100m backstroke | 56.96 | Lottie Cullen | Ulster | 14 November 2025 | BUCS Championships | Sheffield, United Kingdom | ||
| 200m backstroke | 2:04.29 | Melanie Nocher | Ireland | 11 December 2011 | European Championships | Szczecin, Poland | ||
| 50m breaststroke | 29.58 | Mona McSharry | Ireland | 25 October 2025 | World Cup | Toronto, Canada | ||
| 100m breaststroke | 1:03.84 | Mona McSharry | Ireland | 24 October 2025 | World Cup | Toronto, Canada | ||
| 200m breaststroke | 2:18.27 | Mona McSharry | Ireland | 23 October 2025 | World Cup | Toronto, Canada | ||
| 50m butterfly | 25.65 | h | Ellen Walshe | Ireland | 10 December 2024 | World Championships | Budapest, Hungary | |
| 50m butterfly | 25.45 | sf, # | Ellen Walshe | Ireland | 10 December 2024 | World Championships | Budapest, Hungary | |
| 100m butterfly | 55.50 | sf | Ellen Walshe | Ireland | 13 December 2024 | World Championships | Budapest, Hungary | |
| 200m butterfly | 2:02.36 | Ellen Walshe | Ireland | 23 October 2025 | World Cup | Toronto, Canada | ||
| 100m individual medley | 58.19 | sf | Ellen Walshe | Ireland | 3 December 2025 | European Championships | Lublin, Poland | |
| 200m individual medley | 2:04.75 | Ellen Walshe | Ireland | 25 October 2025 | World Cup | Toronto, Canada | ||
| 400m individual medley | 4:22.97 | Ellen Walshe | Ireland | 24 October 2025 | World Cup | Toronto, Canada | ||
| 4×50m freestyle relay | 1:42.31 | h |
| Ireland | 12 December 2008 | European Championships | Rijeka, Croatia | |
| 4×100m freestyle relay | 3:41.09 |
| Larne | 12 December 2019 | Irish Championships | Dublin, Republic of Ireland | ||
| 4×200m freestyle relay | 8:07.86 |
| Kilkenny | 13 December 2019 | Irish Championships | Dublin, Republic of Ireland | ||
| 4×50m medley relay | 1:49.31 | h |
| Ireland | 8 December 2019 | European Championships | Glasgow, United Kingdom | |
| 4×100m medley relay | 3:59.95 |
| Ncd Tallaght | 15 December 2019 | Irish Championships | Dublin, Republic of Ireland |
Legend: # – Record awaiting ratification by Swim Ireland; WR – World record; ER – European record;
Records not set in finals: h – heat;
Records not set in finals: h – heat;
Mixed relay
| Event | Time | Name | Club | Date | Meet | Location | Ref | |
|---|---|---|---|---|---|---|---|---|
| 4×50m freestyle relay | 1:31.86 |
| Ireland | 7 December 2019 | European Championships | Glasgow, United Kingdom | ||
| 4×50m medley relay | 1:41.00 | h |
| Ireland | 5 December 2019 | European Championships | Glasgow, United Kingdom | |
| 4×50m medley relay | 1:40.54 | h, # |
| Ireland | 3 December 2025 | European Championships | Lublin, Poland |
Legend: # – Record awaiting ratification by Swim Ireland;
Records not set in finals: h – heat
Records not set in finals: h – heat
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