The Government of Ontario is the body responsible for the administration of the Canadian province of Ontario. The term Government of Ontario refers specifically to the executive—political ministers of the Crown, appointed on the advice of the premier, and the non-partisan Ontario Public Service, who staff ministries and agencies to deliver government policies, programs, and services—which corporately brands itself as the Government of Ontario, or more formally, His Majesty's Government of Ontario.

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.