| Personal Details | |
| Name | Marc Williams |
| Known As | Marc |
| Year of Birth | 1989 |
| Eligibility Category | Open/Male |
| Membership Details | |||
| Member Number | 49598 | ||
| Member Status | Current | ||
| Ranked Club | City of Bristol SC | ||
| Country of International Representation | England | ||
| Membership Categories |
| SE Club Compete |
| Clubs & Organisations | |
| Club | Ranked |
| City of Bristol SC | Yes |
| Swim England Talent Club | |
| Click For Personal Best | 2024 Short Course | Short Course PB | 2024 Long Course | Long Course PB |
| 50m Freestyle | . | 24.94 | . | 25.72 |
| 100m Freestyle | . | 53.54 | . | 56.21 |
| 200m Freestyle | . | 2:02.85 | . | 2:05.56 |
| 400m Freestyle | . | 4:40.23 | . | . |
| 800m Freestyle | . | . | . | . |
| 1500m Freestyle | . | 18:55.13 | . | . |
| 50m Breaststroke | . | 30.88 | . | 31.76 |
| 100m Breaststroke | . | 1:08.20 | . | 1:11.34 |
| 200m Breaststroke | . | 2:35.24 | . | 2:45.21 |
| 50m Butterfly | . | 28.49 | . | . |
| 100m Butterfly | . | 1:07.39 | . | . |
| 200m Butterfly | . | . | . | . |
| 50m Backstroke | . | 31.85 | . | . |
| 100m Backstroke | . | 1:09.19 | . | . |
| 200m Backstroke | . | . | . | . |
| 200m Individual Medley | . | 2:22.56 | . | 2:28.71 |
| 400m Individual Medley | . | . | . | . |
| 100m Individual Medley | . | 1:03.40 | . | . |
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