| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:17.41 | SCAR Cindy Nicholas Memorial Meet | 2025-11-01 |
| 100m Breaststroke | 1:24.00 | Scar Pan Am Winter Classic | 2026-01-16 |
| 100m Butterfly | 1:16.97 | 2025 Central Region Div 2 LC Championships | 2025-06-13 |
| 100m Butterfly | 1:07.70 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 100m Freestyle | 1:04.03 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 200m Backstroke | 2:51.60 | 2025 Central Region Div 2 LC Championships | 2025-06-13 |
| 200m Butterfly | 2:48.52 | 2025 Central Region Div 1 LC Championships | 2025-06-20 |
| 200m Butterfly | 2:36.44 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 200m Freestyle | 2:23.36 | Scar Pan Am Winter Classic | 2026-01-16 |
| 200m Freestyle | 2:18.57 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 200m IM | 2:45.15 | 2025 Central Region Div 2 LC Championships | 2025-06-13 |
| 200m IM | 2:31.30 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 400m Freestyle | 5:10.61 | 2025 Central Region Div 2 LC Championships | 2025-06-13 |
| 400m Freestyle | 4:51.42 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 400m IM | 5:30.17 | Scar Pan Am Winter Classic | 2026-01-16 |
| 400m IM | 5:22.18 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 50m Breaststroke | 41.59 | 2025 PTBO Fall Invitational | 2025-10-18 |
| 50m Butterfly | 31.41 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 50m Freestyle | 30.16 | Beast Cup 2026 | 2026-01-10 |
| 800m Freestyle | 10:14.07 | Beast Cup 2026 | 2026-01-10 |
Thomas, Ronan's top personal bests include 100m Backstroke (1:17.41), 100m Breaststroke (1:24.00), 100m Butterfly (1:16.97), 100m Butterfly (1:07.70), 100m Freestyle (1:04.03).
Thomas, Ronan swims for Northumberland Aquatic Club.
Thomas, Ronan has competed in 9 meets.