Silja Kosonen
| Personal information | |
|---|---|
| Nationality | Finland | 
| Born | 16 December 2002 Raisio, Finland  | 
| Sport | |
| Sport | Athletics | 
Silja Kosonen (born 16 December 2002) is a Finnish hammer thrower. She competed in the 2020 Summer Olympics. She won the World U20 Championship in Hammer Throw held in Nairobi, Kenya.