| Games: | World Aquatics Championships |
| Nf: | IRL |
| Nfname: | Swim Ireland |
| Year: | 2019 |
| Flagcaption: | Flag of Ireland |
| Location: | Gwangju, South Korea |
| Gold: | 0 |
| Silver: | 0 |
| Bronze: | 0 |
| Appearances: | auto |
Ireland competed at the 2019 World Aquatics Championships in Gwangju, South Korea from 12 to 28 July.
See main article: Diving at the 2019 World Aquatics Championships.
Ireland entered three divers.[1]
| Athlete | Event | Preliminaries | Semifinals | Final | |||
|---|---|---|---|---|---|---|---|
| Points | Rank | Points | Rank | Points | Rank | ||
| align=left rowspan=2 | Oliver Dingley | 1 m springboard | 314.40 | 27 | Did not advance | ||
| 3 m springboard | 417.95 | 10 Q | 358.95 | 18 | Did not advance | ||
| Athlete | Event | Preliminaries | Semifinals | Final | ||||
|---|---|---|---|---|---|---|---|---|
| Points | Rank | Points | Rank | Points | Rank | |||
| align=left rowspan=2 | Clare Cryan | 1 m springboard | 240.70 | 5 Q | 237.05 | 11 | ||
| 3 m springboard | 250.25 | 23 | Did not advance | |||||
| Tanya Watson | 10 m platform | 237.00 | 29 | Did not advance | ||||
See main article: Swimming at the 2019 World Aquatics Championships.
Ireland entered 10 swimmers.[2]
| Athlete | Event | Heat | Semifinal | Final | ||||
|---|---|---|---|---|---|---|---|---|
| Time | Rank | Time | Rank | Time | Rank | |||
| Curtis Coulter | 100 m freestyle | 50.86 | 61 | Did not advance | ||||
| align=left rowspan=2 | Conor Ferguson | 50 m backstroke | 25.60 | 28 | Did not advance | |||
| 200 m backstroke | 2:02.37 | 33 | Did not advance | |||||
| align=left rowspan=3 | Darragh Greene | 50 m breaststroke | 26.94 | 8 Q | 27.14 | 10 | Did not advance | |
| 100 m breaststroke | 59.82 | 17 | Did not advance | |||||
| 200 m breaststroke | 2:10.61 | 17 | Did not advance | |||||
| align=left rowspan=2 | Brendan Hyland | 200 m butterfly | 1:57.09 | 14 Q | 1:56.55 | 11 | Did not advance | |
| 200 m individual medley | Did not advance | |||||||
| align=left rowspan=2 | Shane Ryan | 50 m backstroke | 25.10 | 11 Q | Did not advance | |||
| 100 m backstroke | 54.24 | 21 | Did not advance | |||||
| Jordan Sloan | 200 m freestyle | 1:48.60 | =27 | Did not advance | ||||
| Shane Ryan Robert Powell Jordan Sloan Jack McMillan | 4×100 m freestyle relay | 3:17.38 | 20 | Did not advance | ||||
| Jack McMillan Robert Powell Jordan Sloan Brendan Hyland | 4×200 m freestyle relay | 7:13.91 NR | 16 | Did not advance | ||||
| Shane Ryan Darragh Greene Brendan Hyland Jordan Sloan | 4×100 m medley relay | 3:35.86 NR | 14 | Did not advance | ||||
| Athlete | Event | Heat | Semifinal | Final | ||||
|---|---|---|---|---|---|---|---|---|
| Time | Rank | Time | Rank | Time | Rank | |||
| align=left rowspan=3 | Niamh Coyne | 50 m breaststroke | 32.12 | 30 | Did not advance | |||
| 100 m breaststroke | 1:10.16 | =33 | Did not advance | |||||
| 200 m breaststroke | Did not advance | |||||||
| Ellen Walshe | 100 m butterfly | 1:00.85 | 35 | Did not advance | ||||