Federal minister Christopher Pyne will learn today (13/04) whether his seat of Sturt will be recommended for abolition, sparking a battle with Liberal colleagues.
South Australia is due to lose one seat, going from 11 to 10, because its share of the national population is slowing.
The Australian Capital Territory and Victoria will each gain a seat, taking the total number of M-Ps in the House of Representatives to 151.
Labor has proposed to the Australian Electoral Commission that Mr Pyne's seat should be absorbed into surrounding seats.
But the Liberal Party says the seat of Adelaide, which is held by the retiring Labor M-P Kate Ellis, should be abolished.