| Roles | Competed in Olympic Games |
|---|---|
| Sex | Male |
| Full name | Carl August Herold•Jansson |
| Used name | Herold•Jansson |
| Born | 13 November 1899 in København (Copenhagen), Hovedstaden (DEN) |
| Died | 23 April 1965 in Frederiksberg, Hovedstaden (DEN) |
| Affiliations | Gymnastik- og Svømmeforeningen Hermes, Frederiksberg (DEN) |
| NOC | Denmark |
| Medals | OG |
| Gold | 1 |
| Silver | 0 |
| Bronze | 0 |
| Total | 1 |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1920 Summer Olympics | Diving (Aquatics) | DEN |
Herold Jansson | |||
| Plain High, Men (Olympic) | 6 | |||||
| Artistic Gymnastics (Gymnastics) | DEN |
Herold Jansson | ||||
| Team All-Around, Free System, Men (Olympic) | Denmark | 1 | Gold | |||
| 1924 Summer Olympics | Diving (Aquatics) | DEN |
Herold Jansson | |||
| Plain High, Men (Olympic) | 5 p3 r1/2 |