The political future of Liberal Sophie Mirabella in the Victorian seat of Indi may become clear later on Monday with only a small number of votes to be counted.
Independent Cathy McGowan leads Mrs Mirabella by 515 votes, with 91.96 per cent of the vote counted as of 9.40am (AEST) on Monday.
There are more than 3500 votes yet to be counted with a result expected to become clearer later in the day.
"I'll imagine they'll get through these today," AEC spokesman Dan Doherty said.
"We certainly might get a closer indication by the end of the day."
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Mrs Mirabella has held the seat since 2001 and went to this month's federal election with a nine per cent lead.
In the seat of McEwen, Labor incumbent Rob Mitchell is still leading Liberal challenger Donna Petrovich by 97 votes, with 87 per cent of the vote counted.
There are more than 9100 votes still to be tallied in central Victorian electorate.
