| Personal Details | |
| Name | Keira Marrin |
| Known As | Keira |
| Year of Birth | 2012 |
| Eligibility Category | Female |
| Membership Details | |||
| Member Number | 1620623 | ||
| Member Status | Current | ||
| Ranked Club | Chester-Le-Street SC | ||
| Country of International Representation | England | ||
| Membership Categories |
| SE Club Compete |
| Clubs & Organisations | |
| Club | Ranked |
| Chester-Le-Street SC | Yes |
| Click For Personal Best | 2024 Short Course | Short Course PB | 2024 Long Course | Long Course PB |
| 50m Freestyle | 36.49 | 36.49 | . | 39.81 |
| 100m Freestyle | 1:19.52 | 1:18.67 | 1:21.31 | 1:21.31 |
| 200m Freestyle | 2:52.03 | 2:51.34 | . | 2:57.91 |
| 400m Freestyle | . | 6:06.93 | 6:05.21 | 6:05.21 |
| 800m Freestyle | . | . | . | . |
| 1500m Freestyle | . | . | . | . |
| 50m Breaststroke | 45.45 | 45.45 | 49.15 | 49.15 |
| 100m Breaststroke | 1:39.95 | 1:39.95 | . | 1:45.13 |
| 200m Breaststroke | 3:44.37 | 3:35.91 | 3:41.63 | 3:41.63 |
| 50m Butterfly | 39.04 | 39.04 | 38.16 | 38.16 |
| 100m Butterfly | 1:33.79 | 1:32.76 | 1:36.44 | 1:36.44 |
| 200m Butterfly | . | 3:32.05 | 3:28.46 | 3:28.46 |
| 50m Backstroke | . | 43.80 | . | . |
| 100m Backstroke | . | 1:40.16 | . | . |
| 200m Backstroke | . | . | . | . |
| 200m Individual Medley | 3:20.83 | 3:18.49 | . | . |
| 400m Individual Medley | . | . | . | . |
| 100m Individual Medley | . | 1:31.16 | . | . |
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