Thomas Oliver Newnham QSO (20 November 1926 – 15 December 2010) was a New Zealand political activist and educationalist. He was involved in several left wing causes: attacking institutional racism in New Zealand, and opposing the 1981 Springbok Tour and apartheid in general (both carried out in his role as Secretary of CARE). In the 1988 Queen's Birthday Honours, Newnham was appointed a Companion of the Queen's Service Order for community service. Newnham died on 15 December 2010 from cancer, aged 84, at Elizabeth Knox Hospital, Epsom.