| Mario Grgić | |
| Birth Date: | 1991 9, df=yes |
| Birth Place: | Banja Luka, SFR Yugoslavia |
| Height: | 1.78 m |
| Currentclub: | Kapfenberger SV (academy coach) |
| Position: | Midfielder |
| Youthclubs1: | KSV 1919 |
| Youthyears2: | 1999–2009 |
| Youthclubs2: | ASC Rapid Kapfenberg |
| Years1: | 2009–2015 |
| Caps1: | 106 |
| Goals1: | 8 |
| Years2: | 2015–2019 |
| Caps2: | 31 |
| Goals2: | 3 |
| Years3: | 2020–2023 |
| Caps3: | 72 |
| Goals3: | 4 |
| Manageryears1: | 2023– |
| Managerclubs1: | Kapfenberger SV (academy) |
Mario Grgić (born 10 September 1991) is an Austrian professional football coach and a former player who works with the academy of Kapfenberger SV. He was born in Banja Luka, Bosnia and Herzegovina.