Guy Rainville (born 1963 in Chibougamau Quebec) is a Canadian politician who was the leader of the Green Party of Quebec from 2008 to 2010. He was selected as the party's leader on March 29 2008 defeating incumbent leader Scott McKay. In the Quebec provincial election of 2008 the party lost more than half of its votes from the 2007 election after running only 80 candidates (down from the previous year's 108).