Amarnath Amarasingam is a Canadian extremism researcher.

Amarasingam studied religion and culture at Wilfrid Laurier University from 2007 to 2011. Since September 2011 he teaches as a lecturer at Wilfrid Laurier University, since January 2012 additionally at the University of Waterloo. 2013 he was awarded a PhD with a thesis on social movement activism, his doctoral advisor was Lorne L. Dawson. From May 2014 to May 2016, he conducted research with a grant from the Social Sciences and Humanities Research Council as a postdoctoral fellow at Dalhousie University. He is a senior research fellow at the London Institute for Strategic Dialogue, a fellow in the George Washington University Center for Cyber and Homeland Security extremism program and since January 2017 directs a study on Western Foreign Fighters at the University of Waterloo.

Amarasingam has written for The New York Times,^[1] Politico,^[2] The Atlantic,^[3] Vice News,^[4] The Daily Beast,^[5] Foreign Affairs,^[6] The Huffington Post,^[7] Al Jazeera^[8] and War on the Rocks.^[9] 2016 he participated in the TV-documentation ISIS: Rise of Terror.^[10]

• Pain, Pride, and Politics: Social Movement Activism and the Sri Lankan Tamil Diaspora in Canada. (Thesis) University of Georgia Press 2015 ISBN 978-0-820-34812-4
• Sri Lanka: The Struggle for Peace in the Aftermath of War. C. Hurst & Co. 2017 ISBN 978-1-849-04573-5
• The Stewart/Colbert Effect: Essays on the Real Impacts of Fake News. McFarland & Company 2011 ISBN 978-0-786-45886-8
• Religion and the New Atheism: A Critical Appraisal. Brill Publishers 2010 ISBN 978-90-04-18557-9; Haymarket Books 2012 ISBN 978-1-608-46203-2