Leif Sevón (born 1941) is a Finnish jurist and judge.
Sevón holds a Doctor of Law 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.