Grace O'Sullivan (born 8 March 1962) is an Irish politician who has been a Member of the European Parliament (MEP) from Ireland for the South constituency since July 2019.
She is a member of the Green Party, part of the European Green Party.
She previously served as a Senator for the Agricultural Panel from 2016 to 2019.O'Sullivan is also known for her activism during a 20-year career with Greenpeace.
She is a former Irish surfing champion and has worked for a number of years as an environmental education specialist and ecologist.