The Green Party of Prince Edward Island has achieved unprecedented success for a Canadian Green party, forming Official Opposition from 2019-2023 with eight seats. The party emphasizes environmental protection, sustainable development, electoral reform, and grassroots democracy. PEI's small size and engaged electorate have enabled Greens to gain traction difficult to achieve in larger provinces. Green success on PEI has influenced discussions about proportional representation and demonstrated viability of environmental parties in Canadian elections. While no longer Official Opposition after 2023 elections, PEI Greens maintain legislative presence and continue influencing provincial environmental and democratic reform discussions.