Psephos - Adam Carr's Election Archive

Adam Carr's Election Archive

Australian federal election, 2025
Division of Isaacs, Victoria

Named for: Rt Hon Sir Isaac Isaacs (1855-1948), Vic MP 1892-1901, federal MP 1901-06, judge, Governor-General 1931-36 (first Australian Governor-General)


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Southern Melbourne: Dandenong South, Keysborough, Mentone, Mordialloc, Noble Park

Enrolment at 2019 election: 108,325
Enrolment at 2022 election: 110,673 (+02.3)

1999 republic referendum: No 53.3
2018 same-sex marriage survey: Yes 65.3
2023 Voice referendum: Yes 50.6

Sitting member: Hon Mark Dreyfus (Labor): Elected 2007, 2010, 2013, 2016, 2019, 2022

Attorney-General


2007 Labor majority over Liberal: 7.7%
2010 Labor majority over Liberal: 11.0%
2013 Labor majority over Liberal: 3.9%
2016 Labor majority over Liberal: 5.8%
2019 Labor majority over Liberal: 6.4%
2022 Labor majority over Liberal: 6.9%
2025 notional Labor majority over Liberal: 9.4%

Status: Fairly safe Labor
Labor two-party vote 1983-2022


  • 2022 results
  • Statistics and history

  • Announced candidates:

    Hon Mark Dreyfus
    Australian Labor Party

    Division of Isaacs

    Isaacs was created in 1969 (there was an older seat of Isaacs in another part of Melbourne), running down the eastern shore of Port Phillip, and has always been a marginal seat. Although Isaacs has a fairly high level of median family income, it also has a high proportion of people employed in manufacturing, and a low proportion of people in professional and managerial occupations. This would suggest an electorate with a large number of skilled workers, and indeed 30% of its residents work in manufacturing and construction.

    Isaacs is also a mortgage belt seat, with a high level of families with dependent children and of dwellings being purchased. The electorate's fear of interest rate rises partly explains the large swing against Labor in 2004, while it was the fear among manufacturing workers of the Howard Government's WorkChoices policy that produced a big swing back to Labor in 2007.

    Greg Wilton won Isaacs for Labor in 1996, against the trend of the election. Following his death in 2000, Ann Corcoran won the subsequent by-election. She was an inconspicuous member, and in 2007 the Labor Right faction engineered a move against her that installed Mark Dreyfus QC as the Labor candidate.

    Mark Dreyfus, MP for Isaacs since 2007, was a leading Melbourne barrister, and also an adviser to several Labor state ministers, before his election. He was appointed a parliamentary secretary in 2010 and became Attorney-General and Special Minister of State in early 2013. Although there was a big swing to the Liberals in 2013, Dreyfus increased his majority in 2016 and again in 2019. In 2022 he once again became Attorney-General. He is now 67 but intends standing again.

    The 2018 redistribution removed two blocks of strong Labor territory, around Carrum Downs in the south and Noble Park in the north, replacing them with marginal territory around Heatherton and Moorabbin, formerly in Hotham. This cut the Labor margin slightly. The 2024 redistribution returned Noble Park to the seat, improving Labor's position.

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