| Post: | Speaker |
| Body: | the Western Australian Legislative Assembly |
| Insigniasize: | 100px |
| Insigniacaption: | Crowned circlet |
| Incumbent: | Michelle Roberts |
| Incumbentsince: | 29 April 2021 |
| Style: | The Honourable Madam/Mr Speaker |
| Appointer: | The Monarch's representative at the behest of the Legislative Assembly |
| Termlength: | Elected at start of each Parliament |
| Inaugural: | Sir James George Lee-Steere |
| Formation: | 30 December 1890 |
| Deputy: | Stephen Price |
The Speaker of the Western Australian Legislative Assembly is the presiding officer in the Legislative Assembly. The office has existed since the creation of the Legislative Assembly in 1890 under the Constitution Act 1889. The 31st and current Speaker is Labor MLA Michelle Roberts, who has held the role since the 2021 state election.
The Speaker is elected to the position by a ballot of the members of the Legislative Assembly from among its members after being nominated by the Premier of Western Australia. It is generally a partisan position; the governing party almost always installs one of its members in the position. As with the other states and territories, the Speaker continues to attend party meetings and stands at general elections as a party candidate, if they are indeed a member of a party. There is no convention that the Speaker should be unopposed for reelection.
On the other hand, the Speaker is not a political figure like those in the United States. The Speaker does not take part in debates in the House, does not vote in the House except in the (rare) event of a tied vote, and does not speak in public on party-political issues (except at election time in his or her own constituency).
The Speaker's principal duty is to preside over the Assembly. The occupant of the chair must maintain order in the House, uphold the Standing Orders (rules of procedure) and protect the rights of backbench members. The Speaker is expected to conduct the business of the House in an impartial manner, and generally does so. The Speaker is assisted by a member-elected Deputy Speaker, who is usually also of the governing party.
| Order | Speaker | Party | Term begin | Term end | Term of office | Notes | |
|---|---|---|---|---|---|---|---|
| 1 | Ministerial | 30 December 1890 | 30 November 1903 | 1 | |||
| 2 | Opposition | 2 December 1903 | 27 July 1904 | days | 1 | ||
| 3 | Independent | 28 July 1904 | 27 October 1905 | 1 | |||
| 4 | Ministerial | 23 November 1905 | 8 October 1911 | 1 | |||
| 5 | 1 November 1911 | 13 February 1917 | |||||
| 6 | 13 February 1917 | 1 March 1917 | days | ||||
| 7 | Country | 1 March 1917 | 28 June 1917 | days | |||
| 8 | 19 July 1917 | 23 July 1924 | |||||
| 9 | Labor | 24 July 1924 | 29 July 1930 | ||||
| 10 | Country | 30 July 1930 | 17 July 1933 | ||||
| 11 | Labor | 18 July 1933 | 24 March 1938 | ||||
| 12 | Labor | 4 August 1938 | 2 August 1939 | days | |||
| 13 | Labor | 3 August 1939 | 31 July 1947 | ||||
| 14 | 31 July 1947 | 5 August 1953 | |||||
| 15 | Labor | 6 August 1953 | 1 August 1956 | ||||
| 16 | Labor | 2 August 1956 | 29 June 1959 | ||||
| 17 | Liberal | 30 June 1959 | 23 March 1968 | ||||
| 18 | Liberal | 25 July 1968 | 20 February 1971 | ||||
| 19 | Labor | 15 July 1971 | 8 October 1971 | days | |||
| 20 | Labor | 16 November 1971 | 30 March 1974 | ||||
| 21 | Liberal | 22 May 1974 | 19 February 1977 | ||||
| 22 | Liberal | 24 May 1977 | 21 March 1983 | ||||
| 23 | Labor | 22 March 1983 | 8 February 1986 | ||||
| 24 | Labor | 10 June 1986 | 17 June 1993 | ||||
| 25 | Liberal | 17 June 1993 | 14 December 1996 | ||||
| 26 | Liberal | 6 March 1997 | 10 February 2001 | ||||
| 27 | Labor | 1 May 2001 | 6 September 2008 | ||||
| 28 | Nationals | 6 November 2008 | 9 March 2013 | ||||
| 29 | Liberal | 11 April 2013 | 11 March 2017 | ||||
| 30 | Labor | 11 May 2017 | 29 April 2021 | ||||
| 31 | Labor | 29 April 2021 | Incumbent |