SUPPORT for a republic has slumped to a 16-year low, with more Australians favouring retaining the monarchy for now.

Despite some re-emerging political momentum for the republican cause, voters appear increasingly apathetic about the idea of replacing the Queen and governor-general with an Australia head of state, although many are prepared to accept a republic after Queen Elizabeth's reign ends.

An Age/Nielsen poll taken earlier this month shows support for a republic is now running at 44 per cent. This is the lowest level since 1994, and well down from the peak of 57 per cent in 1999, the year the question was tested in a national referendum.

The national poll of 1400 people found almost half (48 per cent) are now against the idea. Such a level of hostility has not been recorded since the late 1970s, when about 61 per cent were against a republic.

''Australians seem to be saying that they have other things on their minds at the moment,'' Nielsen research director John Stirton said.