| Siril Helljesen | |
| Fullname: | Siril Wethal Helljesen |
| Birth Place: | Oslo, Norway |
| Sport: | Equestrian |
| Club: | Siril Helljesen Dressage, Norway |
| Turnedpro: | 2003 |
| Olympics: | London 2012 |
| Show-Medals: | yes |
Siril Helljesen (born 14 October 1978) is a Norwegian equestrian. She was born in Oslo. She finished 31st in the individual dressage at the 2012 Summer Olympics in London.[1] She became the first Norwegian to compete in dressage event at the Olympics since 1952 Summer Olympics in Helsinki, Finland.[2]