The 2021 Western Australian state election was held on Saturday, March 13, to elect members to the Parliament of Western Australia, where all 59 seats in the Legislative Assembly and all 36 seats in the Legislative Council were up for election.

The Parliament of Western Australia is the bicameral legislature of the Australian state of Western Australia, which constitutes the legislative branch of the state's political system. The parliament consists of the King, the Legislative Council and the Legislative Assembly. The two Houses of Parliament sit in Parliament House in the state capital, Perth.