| Honorific-Prefix: | The Honourable |
| Steve Thomas | |
| Honorific-Suffix: | MLC |
| Nationality: | Australian |
| Office1: | Deputy Leader of the Liberal Party of Western Australia |
| Leader1: | Libby Mettam |
| Term Start1: | 30 January 2023 |
| Term End1: | 28 February 2024 |
| Predecessor1: | Libby Mettam |
| Successor1: | Steve Martin |
| Office2: | Member of the Western Australian Legislative Council for South West Region |
| Term Start2: | 22 May 2017 |
| Assembly3: | Western Australian Legislative |
| Term Start3: | 26 February 2005 |
| Term End3: | 6 September 2008 |
| Predecessor3: | New seat |
| Successor3: | Seat abolished |
| Birth Date: | 1967 10, df=yes |
| Birth Place: | Mansfield, Victoria, Australia |
| Constituency Am3: | Capel |
| Party: | Liberal |
| Profession: | Veterinary Surgeon |
Steven Caldwell Thomas (born 3 October 1967) is an Australian politician. He is a Liberal member of the Western Australian Legislative Council, having represented South West Region since 2017. He served as the party's deputy leader from 2023 to 2024. He was previously a member of the Western Australian Legislative Assembly from 2005 to 2008 representing the electorate of Capel.[1]
Thomas was born in Mansfield, Victoria. Prior to entering politics Thomas was a veterinary surgeon and has a degree in veterinary science.
On entering Parliament Thomas was appointed as acting speaker of the Legislative Assembly (lower house) in March 2005 and was a member of the Public Accounts Committee from April 2005.Thomas was appointed as the shadow minister of the Environment for most of 2006 and from January 2008 acted as the shadow treasurer.[2]
The seat of Capel was abolished and merged with Collie-Wellington and parts of Vasse into the new seat of Collie-Preston. Thomas contested the seat in the 2008 election and lost narrowly to Labor candidate and member for Collie-Wellington, Mick Murray.
Thomas was elected at the 2017 election to represent South West Region in the Legislative Council (upper house), starting from 22 May 2017.[3]
Thomas was elected as deputy party leader in the 30 January 2023 Liberal Party leadership spill.[4] He resigned from this role on 27 February 2024 after The West Australian newspaper revealed he had been in contact with former premier Brian Burke, despite Liberal leader Libby Mettam having claimed none of her frontbenchers had been in contact with Burke.[5] [6] [7]