ALP 15.8%
Incumbent MP
Chris Tallentire, since 2017. Previously member for Gosnells 2008-2017.
Geography
Southern Perth. Thornlie covers the suburb of Thornlie and part of Gosnells. The entire seat lies in Gosnells council area.
Redistribution
No change.
History
Thornlie was created in its current form in 2017, and primarily replaced Gosnells, which was created in 2008. The seat name was previously used from 1977 to 1989. The seat has always been won by Labor.
Gosnells was created with a notional 11.4% margin for the ALP, which was cut to 5.5% at the 2008 election, when the seat was won by Labor candidate Chris Tallentire.
Tallentire won a second term in 2013 with a 2.9% margin, and then a third term in 2017 with a much larger margin.
Candidates
- Chris Tallentire (Labor)
- Rachael Hall (No Mandatory Vaccination)
- JS Masih (Waxit)
- Madeleine Goiran (Australian Christians)
- Kevin McDonald (Liberal)
- Rachel Wright (Greens)
Assessment
Thornlie is a safe Labor seat.
2017 result
| Candidate | Party | Votes | % | Swing |
| Chris Tallentire | Labor | 11,983 | 52.6 | +9.1 |
| Rob Coales | Liberal | 5,682 | 25.0 | -14.2 |
| Sandy Baraiolo | One Nation | 1,747 | 7.7 | +7.7 |
| Donna McAleese | Greens | 1,563 | 6.9 | +1.1 |
| Madeleine Goiran | Australian Christians | 798 | 3.5 | -0.3 |
| Gary Hammond | Shooters, Fishers & Farmers | 526 | 2.3 | +2.3 |
| Sibel Bennett | Micro Business | 309 | 1.4 | +1.4 |
| Andrew van Dam | Flux | 160 | 0.7 | +0.7 |
| Informal | 1,451 | 6.0 |
2017 two-party-preferred result
| Candidate | Party | Votes | % | Swing |
| Chris Tallentire | Labor | 14,965 | 65.8 | +14.0 |
| Rob Coales | Liberal | 7,781 | 34.2 | -14.0 |
Booth breakdown
Booths have been divided into two parts: east and west
Labor won a majority of the two-party-preferred vote in both areas, with 65% in the west and 69% in the east.
| Voter group | ALP 2PP % | Total votes | % of votes |
| West | 65.1 | 8,266 | 36.3 |
| East | 69.1 | 6,725 | 29.5 |
| Pre-poll | 63.6 | 3,132 | 13.8 |
| Other votes | 63.5 | 4,645 | 20.4 |
Two-party-preferred votes in Thornlie at the 2017 WA state election