| Roles | Competed in Olympic Games | |
|---|---|---|
| Sex | Male | |
| Full name | István•Grózner | |
| Used name | István•Grózner | |
| Born | 22 July 1955 in Nova, Zala |  HUN |
| Died | 16 September 1993 (aged 38 years 1 month 25 days) in Rádiháza, Zala | HUN |
| Measurements | 180 cm / 70 kg | |
| Affiliations | Baki Mezőgazdasági Dolgozók Szakszervezete | |
| NOC | Hungary | HUN |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1980 Summer Olympics | Equestrian Eventing (Equestrian) | HUN |
István Grózner | |||
| Individual, Open (Olympic) | Biboros | 16 | ||||
| Team, Open (Olympic) | Biboros / Hungary | 4 |
