| Roles | Competed in Olympic Games |
|---|---|
| Sex | Male |
| Full name | Ernst Hjalmar•Karlsson |
| Used name | Hjalmar•Karlsson |
| Born | 1 March 1906 in Örebro, Örebro (SWE) |
| Died | 2 April 1992 (aged 86 years 1 month 1 day) in Ekerö, Stockholm (SWE) |
| Affiliations | KSSS, Saltsjöbaden, Nacka (SWE) |
| NOC |  Sweden |
| Medals | OG |
| Gold | 1 |
| Silver | 0 |
| Bronze | 0 |
| Total | 1 |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1956 Summer Olympics | Sailing | SWE |
Hjalmar Karlsson | |||
| 5.5 metres, Open (Olympic) | Rush V | 1 | Gold |
