| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:09.70 | OSC J.P. Fiset Invitational | 2025-12-11 |
| 100m Breaststroke | 1:27.19 | Nose Creek Invitational 2026 | 2026-03-14 |
| 100m Butterfly | 1:22.49 | AB PPAC PZDA 2025 | 2025-10-18 |
| 100m Freestyle | 1:02.46 | Nose Creek Invitational 2026 | 2026-03-14 |
| 100m IM | 1:12.36 | Nose Creek Invitational 2026 | 2026-03-14 |
| 200m Backstroke | 2:30.19 | OSC J.P. Fiset Invitational | 2025-12-11 |
| 200m Freestyle | 2:20.11 | Nose Creek Invitational 2026 | 2026-03-14 |
| 200m IM | 2:44.31 | OSC J.P. Fiset Invitational | 2025-12-11 |
| 50m Backstroke | 32.23 | Nose Creek Invitational 2026 | 2026-03-14 |
| 50m Breaststroke | 39.34 | Nose Creek Invitational 2026 | 2026-03-14 |
| 50m Butterfly | 32.21 | Nose Creek Invitational 2026 | 2026-03-14 |
| 50m Freestyle | 27.97 | Nose Creek Invitational 2026 | 2026-03-14 |
Agafonov, Sergey's top personal bests include 100m Backstroke (1:09.70), 100m Breaststroke (1:27.19), 100m Butterfly (1:22.49), 100m Freestyle (1:02.46), 100m IM (1:12.36).
Agafonov, Sergey swims for Sylvan Lake Nauticals.
Agafonov, Sergey has competed in 4 meets.