Andrew James William Copson OBE (born 19 November 1980) is a British humanist leader, civil society activist, and writer. He is the Chief Executive of Humanists UK, a former President and current Ambassador of Humanists International, and the author of a number of books on humanism and secularism. He was appointed an Officer of the Order of the British Empire (OBE) in the 2025 Birthday Honours for services to the Non-Religious Community.

Copson was born on 19 November 1980 in Nuneaton, Warwickshire, to David Copson and Julia Heather Cunningham. He was educated at King Henry VIII School, Coventry, a private school which he describes as secular in its outlook. Coming from a working-class background, he went to the school as part of the government Assisted Places Scheme. He was brought up entirely without religion; as well as having non-religious parents, neither his grandparents nor his great-grandparents were religious and never had been. At secondary school, he first encountered Christianity, but rejected it when he did not see any truth in it.

He attended Balliol College, University of Oxford, initially studying Classics, then graduating with a first class Bachelor of Arts degree in Ancient and Modern History in 2004. He began volunteering for both the British Humanist Association and the Citizenship Foundation, an organisation which aimed to address democratic inequality on social, moral and political issues, after graduating from Oxford.

Copson first joined Humanists UK, known at the time as the British Humanist Association (BHA), in 2002 while at university: his mother had already been a member for some time. This was in response to a campaign Humanists UK was running at the time against the increase in the number of state schools run by religious organisations, or creationist academies.

In 2005 Copson started working at Humanists UK as director of education and public affairs. In December of the same year he won an award at the 2005 UK Young Education Programme, an organisation which promotes communication skills and rewards open debate on issues affecting society. In his role at the BHA he was responsible for campaigning for a secular state and promoting awareness of Humanism in schools and colleges and to the wider public.

In 2010 he became Humanists UK's youngest ever Chief Executive at the age of 29, having been appointed by the Board of Trustees the previous November, a position which he described at the time as "obviously a daunting one", saying that he felt "a huge responsibility to build on the BHA's many successes."

He is a former director of the European Humanist Federation, and has acted as representative of Humanist organisations to the United Nations, the Foreign and Commonwealth Office and the Organization for Security and Co-operation in Europe.

Copson served on the board of Humanists International (formerly the International Humanist and Ethical Union, or IHEU) for fifteen years, from 2010 to 2025. In 2015, Copson was elected President taking over from the award-winning Belgian Humanist Sonja Eggerickx and served in that role for a decade, stepping down at the organization's General Assembly in Luxembourg in July 2025. He was succeeded as President by the American humanist Maggie Ardiente.