Gareth Thomas Llewelyn Hughes (born 31 October 1981) is a New Zealand politician and member of the Green Party. He was a member of the New Zealand Parliament for eleven years, from 2010 to 2020. He first took a seat part way through the 49th Parliament as the next person on the Green party list following the retirement of Jeanette Fitzsimons in February 2010. He did not stand for re-election in the 2020 general election.