| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:32.29 | 2025 Friesen Plastics LASC Fall Challenge | 2025-10-24 |
| 100m Butterfly | 1:34.24 | 2026 Sask Open Short Course Junior Provincials | 2026-02-27 |
| 100m Freestyle | 1:08.76 | 2026 Fernie Fox Invitational | 2026-04-17 |
| 100m IM | 1:22.00 | Maverick Madness 2026 | 2026-01-30 |
| 200m Backstroke | 3:08.32 | 2026 Pronghorn Classic | 2026-03-13 |
| 200m Freestyle | 2:28.03 | Maverick Madness 2026 | 2026-01-30 |
| 200m IM | 3:16.50 | 2025 Friesen Plastics LASC Fall Challenge | 2025-10-24 |
| 400m Freestyle | 5:23.24 | Maverick Madness 2026 | 2026-01-30 |
| 50m Backstroke | 40.02 | Pugsley's Plunge 2026 | 2026-01-16 |
| 50m Breaststroke | 45.72 | 2026 Sask Open Short Course Junior Provincials | 2026-02-27 |
| 50m Butterfly | 37.91 | Maverick Madness 2026 | 2026-01-30 |
| 50m Freestyle | 32.05 | 2026 Fernie Fox Invitational | 2026-04-17 |
Miller, Jonathan's top personal bests include 100m Backstroke (1:32.29), 100m Butterfly (1:34.24), 100m Freestyle (1:08.76), 100m IM (1:22.00), 200m Backstroke (3:08.32).
Miller, Jonathan swims for Medicine Hat Waves.
Miller, Jonathan has competed in 8 meets.