Federal electorate · House of Representatives · VIC
Isaacs
Current member
Mark Dreyfus, Australian Labor Party
Won at the 2025 federal election
Labor
Mark Dreyfus, re-elected
Margin after preferences
14.3 pts
A safe seat
Announced candidates, next election
0
None with a source so far
Next federal election
Candidates publicly announced or preselected so far.
No candidates have been announced for Isaacs yet.
Sitting member
Mark Dreyfus (Australian Labor Party) holds the seat, but no source yet confirms they'll recontest it, so they aren't counted above.
Where Isaacs is
2025 federal election result
Bar colours show each candidate's party.
First preferences
2025 federal election result, first preferences
Fiona Ottey (LIB)30,660 votes,28.3%swing −1.2
Matthew Kirwan (GRN)15,200 votes,14.1%swing +2.0
Geoff McMahon (ONP)4,989 votes,4.6%swing +1.6
Audrey Harmse (FF)3,878 votes,3.6%swing +3.6
Bars show each candidate's share of formal first-preference votes on a 0–100% scale. Swing is the change in share, in percentage points, as published by the AEC.
After preferences (two-candidate preferred)
64.3%35.7%
The vertical line marks 50%.
Margin 14.3 pts (Labor): safe by the AEC's thresholds (under 6 points marginal, 6–10 fairly safe, over 10 safe). This describes this result, not a forecast.
Results as a table
| Candidate | Party | Votes | First pref. | Swing |
|---|---|---|---|---|
| Mark Dreyfus | Australian Labor Party | 53,454 | 49.41% | +6.6 pts |
| Fiona Ottey | Liberal | 30,660 | 28.34% | -1.2 pts |
| Matthew Kirwan | The Greens | 15,200 | 14.05% | +2.0 pts |
| Geoff McMahon | Pauline Hanson's One Nation | 4,989 | 4.61% | +1.6 pts |
| Audrey Harmse | Family First | 3,878 | 3.58% | +3.6 pts |
Source: Australian Electoral Commission