| Roles | Competed in Olympic Games | |
|---|---|---|
| Sex | Male | |
| Full name | Knut•Østby | |
| Used name | Knut•Østby | |
| Nick/petnames | Balder | |
| Born | 12 November 1922 in Modum, Viken |  NOR |
| Died | 6 August 2010 (aged 87 years 8 months 24 days) in Sandvika, Bærum, Viken | NOR |
| Affiliations | Bærum KK — Bærum, Viken | NOR |
| NOC | Norway | NOR |
| Medals | OG |
| Gold | 0 |
| Silver | 1 |
| Bronze | 0 |
| Total | 1 |
Knut Østby had the following podium finishes at the Flatwater World Championships: 2nd 1950 K2 1000 m (with Ivar Mathisen).
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1948 Summer Olympics | Canoe Sprint (Canoeing) | NOR |
Knut Østby | |||
| Kayak Doubles (K2), 1,000 metres, Men (Olympic) | Ivar Mathisen | 4 | ||||
| Kayak Doubles (K2), 10,000 metres, Men (Olympic) | Ivar Mathisen | 2 | Silver | |||
| 1952 Summer Olympics | Canoe Sprint (Canoeing) | NOR |
Knut Østby | |||
| Kayak Doubles (K2), 1,000 metres, Men (Olympic) | Ivar Mathisen | 5 | ||||
| Kayak Doubles (K2), 10,000 metres, Men (Olympic) | Ivar Mathisen | 5 | ||||
| 1956 Summer Olympics | Canoe Sprint (Canoeing) | NOR |
Knut Østby | |||
| Kayak Singles (K1), 1,000 metres, Men (Olympic) | 4 h1 r1/2 | |||||
| Kayak Singles (K1), 10,000 metres, Men (Olympic) | 8 |
