Federation · IRL
Ireland national best marks
Best marks by Ireland athletes in each event, compiled from the all-time lists we import. Derived national bests — not official national records (see note below).
34
Stored marks
32
Distinct marks shown
Women's 400m
Derived 14 Sep 2026
| # | Athlete | Mark | Date | Venue | Age |
|---|---|---|---|---|---|
| 1 | Rhasidat Adeleke | 49.07 | 10 Jun 2024 | — | 21 |
| 2 | Rhasidat Adeleke | 49.17 | 12 Jul 2024 | — | 21 |
| 3 | Rhasidat Adeleke | 49.20 | 10 Jun 2023 | — | 20 |
| 4 | Rhasidat Adeleke | 49.28 | 9 Aug 2024 | — | 21 |
| 5 | Rhasidat Adeleke | 49.54 | 27 May 2023 | — | 20 |
| 6 | Rhasidat Adeleke | 49.86 | 8 Jun 2023 | — | 20 |
| 7 | Rhasidat Adeleke | 49.87 | 21 Aug 2023 | — | 20 |
| 8 | Rhasidat Adeleke | 49.90 | 15 Apr 2023 | — | 20 |
| 9 | Rhasidat Adeleke | 49.99 | 21 Jul 2023 | — | 20 |
| 10 | Rhasidat Adeleke | 50.00 | 25 Aug 2024 | — | 21 |
| 11 | Rhasidat Adeleke | 50.09 | 5 Aug 2024 | — | 21 |
| 12 | Rhasidat Adeleke | 50.13 | 23 Aug 2023 | — | 20 |
| 13 | Sharlene Mawdsley | 50.14 | 21 Jun 2026 | — | — |
| 14 | Sharlene Mawdsley | 50.17 | 23 May 2026 | — | — |
| 15 | Sharlene Mawdsley | 50.28 | 16 Jun 2026 | — | — |
| 16 | Rhasidat Adeleke | 50.42 | 12 Jun 2025 | — | 22 |
| 17 | Sharlene Mawdsley | 50.43 | 16 Jul 2026 | — | — |
| 18 | Rhasidat Adeleke | 50.48 | 15 Jun 2025 | — | 22 |
| 18= | Sharlene Mawdsley | 50.48 | 28 Jun 2026 | — | — |
| 20 | Sharlene Mawdsley | 50.52 | 20 May 2026 | — | — |
| 21 | Rhasidat Adeleke | 50.53 | 17 Aug 2022 | — | 19 |
| 21= | Rhasidat Adeleke | 50.53 | 25 May 2023 | — | 20 |
| 23 | Rhasidat Adeleke | 50.54 | 9 Jun 2024 | — | 21 |
| 24 | Rhasidat Adeleke | 50.58 | 14 May 2023 | — | 20 |
| 25 | Rhasidat Adeleke | 50.70 | 15 May 2022 | — | 19 |
| 26 | Sharlene Mawdsley | 50.71 | 5 Aug 2024 | — | — |
| 27 | Sharlene Mawdsley | 50.72 | 18 May 2024 | — | — |
| 28 | Joane Cuddihy | 50.73 | 27 Aug 2007 | — | — |
| 29 | Rhasidat Adeleke | 50.80 | 20 Aug 2023 | — | 20 |
| 30 | Rhasidat Adeleke | 50.81 | 20 Jul 2022 | — | 19 |
| 31 | Sharlene Mawdsley | 50.82 | 21 Jun 2024 | — | — |
| 32 | Sharlene Mawdsley | 50.93 | 28 Jun 2025 | — | — |
| 33 | Rhasidat Adeleke | 50.96 | 13 Sep 2024 | — | 22 |
| 34 | Sharlene Mawdsley | 50.99 | 9 Jun 2024 | — | — |
Every mark in scope within the compiled depth. Equal marks share a rank ("1=" style). An athlete with marks for two nations appears under each nation represented at the time (e.g. Obikwelu under Nigeria and Portugal).
About this derivation
These lists are derived from the marks in our database — including the complete legal all-time lists imported from alltime-athletics.com — grouped by the nation the athlete was representing at each mark. They are not official national records: federations ratify national records under their own eligibility rules, and some marks here may not qualify.