Julia Lily Ann Lonergan (born 14 January 1961)[1] is an Australian judge who was appointed to the Supreme Court of New South Wales in March 2017.
She appeared as a junior barrister for the plaintiff in Simpson v Diamond, which resulted in the highest medical negligence verdict in New South Wales history, leading to changes in the legislation relating to civil liability.
From 2013 to 2014, she was counsel assisting a Special Commission of Inquiry into child sex abuse allegations in the Roman Catholic Diocese of Maitland-Newcastle.
[3] She was elected to the Council of the NSW Bar Association for 2016 in a result that helped block a conservative effort to oust the incumbent members.
[4][5] Lonergan has served on the equal opportunity committees of both the Law Council of Australia and the New South Wales Bar Association.