| Roles | Competed in Olympic Games | |
|---|---|---|
| Sex | Male | |
| Full name | John Bjørn•Bjørnseth | |
| Used name | Bjørn•Bjørnseth | |
| Born | 28 August 1888 in Oslo, Oslo |  NOR |
| Died | 1 September 1976 (aged 88 years 4 days) in Ullensaker, Akershus | NOR |
| Affiliations | DNOR — ? | NOR |
| NOC | Norway | NOR |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1920 Summer Olympics | Equestrian Eventing (Equestrian) | NOR |
Bjørn Bjørnseth | |||
| Individual, Open (Olympic) | Lydia | |||||
| Team, Open (Olympic) | Lydia / Norway | |||||
| 1936 Summer Olympics | Equestrian Dressage (Equestrian) | NOR |
Bjørn Bjørnseth | |||
| Individual, Open (Olympic) | Invictus | 28 | ||||
| Team, Open (Olympic) | Invictus / Norway | 7 |
