Up to 90 asylum seekers have rejected an offer to move to the United States, prompting claims from Peter Dutton that they are waiting for a Labor government before attempting to resettle in Australia.

Wednesday's figures show a further 20 have declined the US offer since November, when they were told they would not receive welfare in the US, according to the Home Affairs Minister's office.

Describing the 90 who had rejected the US resettlement offer as a "significant number," Mr Dutton accused the asylum seekers of being ungrateful political opportunists.

"If you are a legitimate refugee I think like millions before you would be happy to go to the US," he said.