The Council of Australian Humanist Societies (CAHS) facilitates cooperation among Australia’s state Humanist societies, to pursue projects and campaigns of wider interest or application than the local or particular focus of each separate organisation. CAHS also supports researching and developing the historic, philosophical, social, psychological, political, ethical and practical sources and potentials of Humanism. Projects might include seminars, think-tanks, articles and monographs, specialised journals, affinity groups, essay awards and the like.

Australia's National Secular Lobby provides a strong and active voice for the nation's secular majority.

The NSL is pro-secular rather than anti-religious. They work towards the separation of religion and state, and the removal of undue religious privilege in legislation.

The Rationalist Society of Australia champions reason & evidence as the basis of public policy.

Rationalists believe all decisions should be based on reason and evidence. Their mission is to campaign for rational public policy and promote reason in Australia, something they’ve been doing since 1906.