Jean-Yves Rey (born November 24, 1970) is a Swiss ski mountaineer and long-distance runner.

Rey was born in Sierre.

He started ski mountaineering in 1990, competing first in the Patrouille des Glaciers short-distance race.

He was a member of the national team from 1999 to 2006.

Rey won the Zermatt marathon in 2004, the Mont-Blanc marathon in 2008, as well as three times in a row the AlpenMarathon – Marathon des Alpages, where he has held the course record with a total time of 3:07:18 hours since 2005.