| Sebastián Trillini | |
| Fullname: | Sebastián Martin Junior Trillini |
| Birth Date: | 16 April 1994 |
| Role: | Rider |
| Ridertype: | Pursuitist (track) |
| Amateuryears1: | 2014 |
| Amateurteam1: | Hagens Berman U23 |
| Amateuryears2: | 2016 |
| Amateuryears3: | 2018 |
| Amateurteam3: | SAT |
| Amateuryears4: | 2022 |
| Amateurteam4: | Super Froiz |
| Amateuryears5: | 2022 |
| Amateurteam5: | Lafranfox[1] |
| Amateuryears6: | 2024 |
| Amateurteam6: | Náutico Boca del Cufré |
| Proyears1: | 2015 |
| Proyears2: | 2017 |
| Proyears3: | 2023 |
| Show-Medals: | no |
Sebastián Martin Junior Trillini (born 16 April 1994) is an Argentine road and track cyclist, who last rode for UCI Continental team . He competed in the team pursuit event at the 2015 UCI Track Cycling World Championships.[2] He won the silver medal in the under-23 time trial at the 2015 Pan American Road Cycling Championships.[3]