| Strokes: | Freestyle |
| Club: | SoIK Hellas |
| Birth Date: | 8 April 1904 |
| Birth Place: | Stockholm, Sweden |
| Death Date: | 26 August 2002 (aged 98) |
| Death Place: | Stockholm, Sweden |
| Show-Medals: | yes |
Karl Oskar Georg Werner (8 April 1904 – 26 August 2002) was a Swedish freestyle swimmer who won bronze medals in the 4 × 200 m relay at the 1924 Olympics and 1926 European Championships.[1]