Population growth and movement is likely to boost the number of federal MPs to 151, a new study shows.
A paper by the Parliamentary Library published on Tuesday predicted the number of seats in South Australia would be reduced by one to 10, and Victoria and the ACT would gain one seat each, based on the latest census data.
The House has had 150 seats since the 2001 election.
SA's seat numbers would be the lowest since 1954 and down from 13 at the 1990 election.
Victoria has experienced annual population growth of 2.4 per cent, the highest of any state, while the ACT's growth was 1.7 per cent.
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Victoria's allocation would lift to 38 while the ACT would go from two to three seats.
The Australian Electoral Commission is currently working on redistributions in Queensland and Tasmania.
A Victorian redistribution is scheduled to start later this year.
