Metiria Leanne Agnes Stanton Turei is a New Zealand academic and former politician. She was a Member of Parliament from 2002 to 2017 and the female co-leader of the Green Party of Aotearoa New Zealand from 2009 to 2017. Turei resigned from the co-leader position on 9 August 2017 amid a political controversy arising from her admission to lying to the Ministry of Social Development to receive higher payments when she was on the Domestic Purposes Benefit and later, to being enrolled to vote in an electorate where she was not eligible when she was 23.

The co-leaders of the Green Party of Aotearoa New Zealand are the dual highest-ranking members of the Green Party caucus, chosen by the party membership to represent the party. The current co-leaders are Marama Davidson and Chlöe Swarbrick.