| Santiago Ostolaza | |
| Fullname: | Santiago Javier Ostolaza Sosa |
| Birth Date: | 10 July 1962 |
| Birth Place: | Dolores, Soriano, Uruguay |
| Height: | 1.90 m |
| Position: | Midfielder |
| Currentclub: | Uruguay U17 (Head Coach) |
| Years1: | 1980–1986 |
| Years2: | 1986–1990 |
| Years3: | 1990–1992 |
| Years4: | 1992 |
| Years5: | 1992–1993 |
| Years6: | 1994 |
| Years7: | 1995 |
| Years8: | 1995 |
| Years9: | 1996 |
| Years10: | 1997 |
| Years11: | 1998–1999 |
| Years12: | 1999 |
| Years13: | 2000 |
| Clubs13: | Montevideo Wanderers |
| Caps3: | 72 |
| Goals3: | 8 |
| Caps4: | 38 |
| Goals4: | 2 |
| Caps5: | 13 |
| Goals5: | 3 |
| Caps9: | 20 |
| Goals9: | 1 |
| Caps11: | 24 |
| Goals11: | 0 |
| Caps13: | 18 |
| Goals13: | 1 |
| Nationalyears1: | 1985–1993 |
| Nationalteam1: | Uruguay |
| Nationalcaps1: | 43 |
| Nationalgoals1: | 6 |
| Manageryears1: | 2001 |
| Manageryears2: | 2001 |
| Manageryears4: | 2004 |
| Manageryears7: | 2009 |
| Manageryears8: | 2011 |
| Manageryears9: | 2014– |
| Managerclubs9: | Uruguay U17 |
Santiago Javier Ostolaza Sosa (born 10 July 1962 in Dolores, Soriano) is a Uruguayan former football midfielder and the current manager of the Uruguayan U-17 national team. Among others clubs, he was manager for Nacional of Uruguay. He played for the same team when he was a player, and in 1988 he received the prize as man of the match after the Intercontinental Cup final against PSV Eindhoven, in which he scored two goals.[1]
Ostolaza made 43 appearances for the Uruguay national football team from 1985 to 1993[2] and played at the 1990 FIFA World Cup.
He has a son, also named Santiago Ostolaza, who currently plays for Montevideo Wanderers.