Yannick Pelletier (born September 22, 1976 in Biel/Bienne, Switzerland) is a Swiss chess player. He completed his final Grandmaster norm at the 2000 Chess Olympiad in Istanbul and was officially awarded the Grandmaster title in 2001. Pelletier won the Swiss Chess Championship in 1995, 2000, 2002 and 2010.
In 2001 he tied for 1st-4th with Tamaz Gelashvili, Mark Hebden and Vladimir Tukmakov in the 9th Neuchâtel Open and in 2007 tied for 3rd-5th with Judit Polgár and Alexander Grischuk in the 40th Biel chess tournament.
Pelletier also won in Zurich 2001 with a score of 6 1/2 out of 7 and repeated this victory in Zurich 2002 with a score of 6 out of 7.