| Thomas Clarkson | |
| Birth Date: | 2000 2, df=yes |
| Birth Place: | Dublin, Ireland |
| Weight: | 124kg (273lb) |
| Ru Position: | Prop |
| Ru Amateurclubs: | Dublin University |
| Ru Clubyears: | 2020– |
| Ru Proclubs: | Leinster |
| Ru Clubcaps: | 47 |
| Ru Clubpoints: | (10) |
| Ru Clubupdate: | 20 November 2024 |
| Repyears1: | 2019–2020 |
| Repteam1: | Ireland U20 |
| Repcaps1: | 13 |
| Reppoints1: | 10 |
| Repyears2: | 2024– |
| Repteam2: | Ireland |
| Repcaps2: | 2 |
| Reppoints2: | 0 |
| Ru Ntupdate: | 23 November 2024 |
| School: | Blackrock College |
| University: | Trinity College Dublin |
Thomas Clarkson (born 22 February 2000) is an Irish rugby union player who plays for Leinster Rugby. He plays as a prop and represents Dublin University in the All-Ireland League.
Born in Dublin, Clarkson attended Blackrock College and won a Leinster Schools Rugby Senior Cup with the school in 2018, alongside fellow Leinster academy member Liam Turner. After leaving school, he joined Dublin University, the club representing Trinity College Dublin, in the amateur All-Ireland League.[1]
Clarkson joined the Leinster academy ahead of the 2019–20 season.[2] He made his senior debut for the province on 29 August 2020 as a 63rd minute replacement for Michael Bent in their 28–10 derby victory against Ulster.[3] [4]
Ever-present as the team's tighthead prop, Clarkson was a key player for the Ireland under-20s team that won a grand slam during the 2019 Six Nations Under 20s Championship.[1] He also represented the team at the 2019 World Rugby Under 20 Championship, and was vice-captain of the side during the 2020 Six Nations Under 20s Championship, where they secured consecutive triple crown's,[5] though the tournament was cancelled with two rounds still to be played due to the COVID-19 pandemic.[6]
In November 2024, he made his debut for Ireland in the 2024 Autumn Nations Series coming off the bench to replace Finlay Bealham in 22-19 win over Argentina.[7]