Róisín Shortall (born 25 April 1954) is an Irish Social Democrats politician who has been joint leader of the Social Democrats since June 2015. She has been a Teachta Dála (TD) for the Dublin North-West constituency since 1992. She previously served as Minister of State for Primary Care from 2011 to 2012. A member of the Labour Party until 2012, she sat as an Independent from 2012 to 2015, until she co-founded the Social Democrats in July 2015. In August 2022, she became the longest serving female TD in the history of the State, overtaking Mary Harney.