ALMOST 15,000 people have joined an Atheist Foundation of Australia push to mark "no religion" on the August 9 census.

The foundation has begun unveiling billboards across the country urging people to join their campaign to take the religion out of politics.

In Queensland there are two billboards - on Breakfast Creek Rd, Newstead and Fairfield Rd, Yeerongpilly.

Thousands have also pledged to mark "no religion" in a Facebook campaign asking Australians to question whether they hold religious beliefs.

AFA president David Nicholls said many people simply marked down the religion they were born into, despite not now being religious people at all.

He said the transfer of taxpayer money to religious organisations was justified on the basis of the census results, as were special concessions and exemptions including the right to discriminate against some groups.

"There are religious lobby groups out there who pressure the government on the basis of the census," Mr Nicholls said.

"They say '60 per cent of Australians are Christian so we would like you to do XYZ' even though the leading nature of the religion question on the census can skew the statistics."

More than 70,000 people declared themselves members of Star Wars' Jedi order in 2001 but Mr Nicholls said the joke was over.

"If you put down Jedi, you are marked no response and all you are doing is handing religion your power over yourself," he said.

Starting next week, census collectors will begin delivering to every household in Australia.

Australians can either complete the census via the paper form or online using eCensus.