| Sebastián Martínez | |
| Birth Date: | 4 December 1978 |
| Birth Place: | Vienna, Austria |
| Position: | Midfielder |
| Youthclubs1: | Club Deportivo Motagua |
| Years1: | 1999–2000 |
| Years2: | 2000–2003 |
| Years3: | 2003–2006 |
| Years4: | 2006–2008 |
| Years5: | 2008–2009 |
| Years6: | 2009–2012 |
| Clubs5: | Wiener Neustadt |
| Clubs6: | First Vienna |
| Caps1: | 0 |
| Caps2: | 79 |
| Caps3: | 100 |
| Caps4: | 48 |
| Caps5: | 26 |
| Caps6: | 33 |
| Goals1: | 0 |
| Goals2: | 35 |
| Goals3: | 13 |
| Goals4: | 8 |
| Goals5: | 3 |
| Goals6: | 5 |
| Nationalyears1: | 2005 |
| Nationalteam1: | Austria |
| Nationalcaps1: | 2 |
| Nationalgoals1: | 0 |
| Club-Update: | 17 July 2011 |
| Nationalteam-Update: | 15 December 2008 |
Sebastián Martínez (born 4 December 1977) is an Austrian former footballer.
Martínez was born in Austria, to the Uruguayan footballer Alberto Martínez. Martínez spent his early childhood in Uruguay, and holds dual citizenship.[1]