Marriage survey to hit two-thirds return

A senior cabinet minister believes two-thirds of Australians will return their marriage survey forms ahead of the deadline.

Special Minister of State Scott Ryan says he expects a two-thirds return rate of same-sex marriage surveys.

The Australian Bureau of Statistics says to date there has been a 62.5 per cent return.

"I think we could get very comfortably to two-thirds, which is an extraordinary response and a testament to the conduct of the debate and Australians' willingness to participate in the survey," Senator Ryan told Sky News on Tuesday.