Thomas Albert Cromwell (born May 5, 1952) is a Canadian jurist and former Puisne Justice on the Supreme Court of Canada.
After eleven years on the Nova Scotia Court of Appeal, Cromwell was nominated to succeed Michel Bastarache and occupy the seat traditionally reserved for Atlantic provinces on the Supreme Court of Canada by Prime Minister Stephen Harper,.
and assumed office on December 22, 2008.
Cromwell retired in September 2016, and was succeeded by Malcolm Rowe.
Known as a centrist on Canada's highest court, his reasoning as a provincial appellate judge in R v Marshall; R v Bernard was adopted by unanimous decision in the landmark Aboriginal title case of Tsilhqot'in Nation v British Columbia in 2014 during his tenure.