The sudden ballot for the Labor Party leadership split the party's MPs in the ACT.
Even before the ballot, ACT Senator and Sports Minister Kate Lundy, and Member for Fraser Andrew Leigh, said they would vote for Julia Gillard.
Kevin Rudd dropped Senator Lundy from Labor's frontbench after the 2007 election. She was promoted to the ministry by Ms Gillard in March last year.
Dr Leigh, recently appointed as parliamentary secretary to the Prime Minister, described Ms Gillard as an extraordinary person.
''She has an ability to get people working as a team together,'' he said. ''I think she can lead us to victory at the next election.''
After the ballot, the member for Canberra, Gai Brodtmann, said she supported Mr Rudd. ''I voted for Kevin Rudd to give Labor a fighting chance,'' she said. ''I made my decision thinking about the future of Canberra , the future of the Labor Party and the future of the nation.''
The Minister for Defence Materiel, Mike Kelly, who holds the bellwether seat of Eden-Monaro based on Queanbeyan, did not respond to questions by late Wednesday about his support.
Meanwhile, ACT Chief Minister Katy Gallagher said Ms Gillard's loss to politics was a loss to the nation.
''Julia Gillard was an excellent Prime Minister who managed to implement significant national reforms during her time in office. Anyone who worked with her saw and understood her skills and capabilities, and I'm very sorry about the way she has been treated and about the events that have led to her loss tonight.
''Federal Labor must now unite and focus on challenging the federal opposition to a real discussion about the country's future. That's what the electorate wants.''