| Iva Grbas | |
| Position: | Power forward / center |
| Height M: | 1.88 |
| Birth Date: | 29 December 1987 |
| Birth Place: | Rijeka, SFR Yugoslavia |
| Nationality: | Croatian |
| Draft League: | WNBA |
| Draft Year: | 2009 |
| Career End: | 2015 |
| Years1: | 2010–2011 |
| Team1: | Novi Zagreb |
| Years2: | 2011–2012 |
| Team2: | Reims Basket Féminin |
| Years3: | 2012–2013 |
| Team3: | Limoges ABC |
| Years4: | 2013–2014 |
| Team4: | Libertas Trogylos Basket |
| Years5: | 2014–2015 |
| Team5: | NB Oberhausen |
Iva Grbas (born 29 December 1987 in Rijeka, SFR Yugoslavia) is a Croatian professional basketball player.