The Green Party of Manitoba ('GPM') is a green provincial political party in Manitoba, Canada, founded on November 11, 1998. The party is legally autonomous from the Green Party of Canada, though for several years many of its members also belonged to the Green Party of Canada in Manitoba, a federal organization established in 1996. The GPM has maintained a position as the fourth largest party in Manitoba since the 2003 election until the 2023 Manitoba general election, both in the number of votes received and candidates run.

The 2003 Manitoba general election was held on June 3, 2003 to elect Members of the Legislative Assembly of the Province of Manitoba, Canada. It was won by the New Democratic Party, which won 35 seats out of 57, securing another term for premier Gary Doer.