Peter Charles Tabuns is a Canadian politician who served as the interim leader of the Ontario New Democratic Party and the leader of the Opposition from 2022 to 2023. He is a member of the Legislative Assembly of Ontario, first elected in a 2006 by-election to represent the riding of Toronto—Danforth.

The Legislative Assembly of Ontario is the legislative chamber of the Canadian province of Ontario. Its elected members are known as Members of Provincial Parliament (MPPs). Bills passed by the Legislative Assembly are given royal assent by the lieutenant governor of Ontario to become law. Together, the Legislative Assembly and Lieutenant Governor make up the unicameral Legislature of Ontario or Parliament of Ontario. The assembly meets at the Ontario Legislative Building at Queen's Park in the provincial capital of Toronto.