Guy Serle Goodwin-Gill (born 25 December 1946) is a barrister and a professor of public international law at Oxford University and a Fellow of All Souls College, Oxford.
He currently serves as the acting director of the Andrew and Renata Kaldor Centre for International Refugee Law at the University of New South Wales.
Goodwin-Gill became noted for his contributions to the debate around international law and the Palestine question.
He served as part of the advisory team which presented the Palestinian point of view with regards to the Israeli "Separation Wall" or "Separation Fence" on the Palestinian West Bank, which culminated in a 2004 ruling by the UN-affiliated International Court of Justice that the barrier was illegal.
In 2011, Goodwin-Gill wrote a legal opinion which recommended that the Palestinian National Authority not seek recognition of Palestine as a member state of the United Nations on the grounds that such a move would deprive the considerable Palestinian diaspora of legal representation within the putative state.