| Order: | 11th |
| Office: | Supreme Court of FinlandPresident of the Supreme Court of Finland |
| Term Start: | 1 January 2002 |
| Term End: | 31 December 2005 |
| Predecessor: | Olavi Heinonen |
| Successor: | Pauliine Koskelo |
| Order1: | 1st |
| Office1: | EFTA CourtPresident of the European Free Trade Association Court |
| Term Start1: | 1994 |
| Term End1: | 1995 |
| Predecessor1: | Office established |
| Successor1: | Bjørn Haug |
| Birth Date: | 31 October 1941 |
| Birth Place: | Helsinki, Finland |
| Nationality: | Finnish |
| Alma Mater: | University of Helsinki |
Leif Jörgen Arvidsson Sevón (born 31 October 1941) is a Finland-Swedish jurist and judge.
Sevón holds a Licentiate in Laws degree from the University of Helsinki. His positions include a directorate at the Ministry of Justice, the presidency of the EFTA Court, a seat in the European Court of Justice, and an advisory position at the Ministry of Foreign Affair's Trade Directorate. He left the European Court in 2002 after his appointment as President of the Supreme Court of Finland. In 2005 he retired from the presidency of the Supreme Court.