| Gaston Diamé | |
| Birth Date: | 16 November 1971 |
| Birth Place: | Dakar, Senegal |
| Position: | Striker |
| Years1: | 1991–1996 |
| Clubs1: | Saint-Christophe Châteauroux |
| Years2: | 1996–1997 |
| Clubs2: | SO Romorantin |
| Years3: | 1997–1998 |
| Clubs3: | US Joué-lès-Tours |
| Caps3: | 21 |
| Goals3: | 2 |
| Years4: | 1998–2001 |
| Clubs4: | FC Bourges |
| Years5: | 2001–2003 |
| Clubs5: | Reims |
| Caps5: | 25 |
| Goals5: | 7 |
| Years6: | 2003–2004 |
| Clubs6: | Angoulême CFC |
| Caps6: | 16 |
| Goals6: | 1 |
| Years7: | 2004–2005 |
| Clubs7: | AS Yzeure |
| Caps7: | 16 |
| Goals7: | 4 |
| Years8: | 2005–2007 |
| Clubs8: | Imphy Decize |
| Nationalyears1: | 2003 |
| Nationalteam1: | Mauritania |
| Nationalcaps1: | 2 |
| Nationalgoals1: | 0 |
| Manageryears2: | 2013 |
| Managerclubs2: | Paris |
| Manageryears1: | 2010–2012 |
| Managerclubs1: | Imphy Decize |
Gaston Diamé (born 16 November 1971) is a Mauritanian former international footballer who played as a striker.
Born in Dakar, Senegal, Diamé spent his entire club career in France, playing for Saint-Christophe Châteauroux, SO Romorantin, US Joué-lès-Tours, FC Bourges, Reims, Angoulême CFC, AS Yzeure and SNID.
He also earned two international caps for Mauritania in 2003, both of which came in FIFA World Cup qualifying games.