| Sebastián Píriz | |
| Fullname: | Sebastián Gerardo Píriz Ribas |
| Birth Date: | 4 March 1990 |
| Birth Place: | Montevideo, Uruguay |
| Height: | 1.86 m |
| Position: | Defensive midfielder |
| Currentclub: | River Plate |
| Clubnumber: | 20 |
| Years1: | 2010–2012 |
| Caps1: | 37 |
| Goals1: | 2 |
| Years2: | 2012–2015 |
| Caps2: | 69 |
| Goals2: | 8 |
| Years3: | 2016 |
| Caps3: | 8 |
| Goals3: | 0 |
| Years4: | 2016 |
| Caps4: | 2 |
| Goals4: | 0 |
| Years5: | 2017 |
| Caps5: | 14 |
| Goals5: | 0 |
| Years6: | 2018 |
| Caps6: | 20 |
| Goals6: | 1 |
| Years7: | 2018 |
| Clubs7: | Panionios |
| Caps7: | 6 |
| Goals7: | 0 |
| Years8: | 2019–2021 |
| Caps8: | 57 |
| Goals8: | 5 |
| Club-Update: | 7 September 2019 |
Sebastián Gerardo Píriz Ribas (born 4 March 1990, in Montevideo) is a Uruguayan footballer who plays as a central midfielder for River Plate in Montevideo.