The All-Party Parliamentary Humanist Group is a cross-party group of Members of the House of Commons and the House of Lords of all the main parties, including members from the Crossbenches in the Lords.

The Group has grown rapidly, from its first beginnings in the 1960s; in 1996 it had 47 members and at the end of the 2019-24 Parliament it had over 115. Associate membership of the Group is also open to staff of MPs and peers and staff working for the House of Commons or House of Lords. The Group is not part of Humanists UK, but Humanists UK provides the secretariat for the Group.

The Group meets around four times a year to hear speakers and discuss relevant issues, as well as to share information and receive briefings on matters of interest. These matters are wide-ranging and include the promotion of a rational approach to bioethical, medical, and scientific issues; the defence of free speech, civil liberties, and education; constitutional issues and freedom of religion or belief; and other issues of relevance to humanists.

In March 2024, members elected the following individuals as officers. A new election is yet to be held for the new Parliament: