Katharine Gelber is a Professor in the School of Political Science and International Studies at the University of Queensland, a Fellow of the Academy of Social Sciences Australia, and a former ARC Future Fellow (2012-2015). Her expertise is in freedom of speech and speech regulation, with research projects into the operation of hate speech laws (with Prof Luke McNamara), and the ways in which counter-terrorism policies have limited freedom of speech. She has published 'Free Speech After 9/11' (Oxford University Press, 2016), and her 2011 book, Speech Matters, was shortlisted by the Australian Human Rights Commission in the 2011 Human Rights Award Literature (Non-Fiction) Category. She is a former president of the Australian Political Studies Association.
In 2011 she was invited by the United Nations to be the Australian expert witness at a regional meeting examining states' compliance with the free speech and racial hatred provisions of international law. In 2009 she presented the Mitchell Oration in Adelaide on the topic "Freedom of Speech and its Limits".