The Leader of His Majesty's Opposition in Victoria is the leader of the largest political party in parliament but not in government. They are always a member of the Legislative Assembly.

The Parliament of Victoria is the bicameral legislature of the Australian state of Victoria that follows a Westminster-derived parliamentary system. It consists of the King, represented by the governor of Victoria, the Legislative Assembly and the Legislative Council. It has a fused executive drawn from members of both chambers. The parliament meets at Parliament House in the state capital Melbourne. The current Parliament was elected on 26 November 2022, sworn in on 20 December 2022 and is the 60th parliament in Victoria.