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).
15
Stored marks
13
Distinct marks shown
Men's 400mH
Derived 14 Sep 2026
| # | Athlete | Mark | Date | Venue | Age |
|---|---|---|---|---|---|
| 1 | Thomas Barr | 47.97 | 18 Aug 2016 | — | — |
| 2 | Thomas Barr | 48.26 | 1 Aug 2021 | — | — |
| 3 | Thomas Barr | 48.31 | 9 Aug 2018 | — | — |
| 4 | Thomas Barr | 48.39 | 16 Aug 2016 | — | — |
| 4= | Thomas Barr | 48.39 | 7 Jun 2021 | — | — |
| 6 | Thomas Barr | 48.65 | 4 Jun 2015 | — | — |
| 7 | Thomas Barr | 48.71 | 23 Aug 2015 | — | — |
| 8 | Thomas Barr | 48.78 | 10 Jul 2015 | — | — |
| 9 | Thomas Barr | 48.79 | 20 Jun 2024 | — | — |
| 10 | Thomas Barr | 48.90 | 14 Jun 2014 | — | — |
| 11 | Thomas Barr | 48.93 | 15 Aug 2016 | — | — |
| 12 | Thomas Barr | 48.94 | 11 Jul 2014 | — | — |
| 13 | Thomas Barr | 48.95 | 15 Jun 2017 | — | — |
| 14 | Thomas Barr | 48.99 | 15 May 2015 | — | — |
| 14= | Thomas Barr | 48.99 | 21 Jul 2018 | — | — |
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.