| Roles | Competed in Olympic Games | 
|---|---|
| Sex | Male | 
| Full name | Jens Birger•Knudtzon | 
| Used name | Birger•Knudtzon | 
| Born | 19 February 1936 in Oslo, Oslo (NOR) | 
| Measurements | 181 cm / 83 kg | 
| Affiliations | Bærum Roklubb, Sandvika, Bærum (NOR) | 
| NOC |   Norway | 
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1964 Summer Olympics | Rowing |  NOR | 
Birger Knudtzon | |||
| Coxed Fours, Men (Olympic) | Norway | 9 |