John James "Jack" Harris KC (born October 27, 1948) is a former Canadian lawyer and politician from Newfoundland and Labrador.

He won the seat again in the 2019 federal election, becoming the only NDP member of the House of Commons from Atlantic Canada.

Harris first became a member of the House of Commons of Canada after winning a by-election in the riding of St. John's East on July 20, 1987.

[7] Harris retired from provincial politics in 2006 and was succeeded by Lorraine Michael as leader of the party as well as the Member of the House of Assembly for Signal Hill-Quidi Vidi.

Following the election, Harris was appointed as the party's Critic for National Defence, and, on several occasions, has been named one of "The Backbench Top Ten", for his performance in the House of Commons, by Maclean's Magazine.