Per Magnus Ranstorp, (b. 13 March 1965 in Hästveda) is a Swedish scholar who has written about Hizballah, Hamas, al-Qaeda and other militant Islamic movements. He is the Research Director of the Centre for Asymmetric Threat Studies at the Swedish National Defence College, directing a project on Strategic Terrorist Threats to Europe which focuses on radicalisation and recruitment of salafist-jihadist terrorists across Europe and the convergence between Chemical, Biological, Radioactive and Nuclear Weapons and Terrorism. Ranstorp graduated from Gustavus Adolphus College in Saint Peter, Minnesota in 1985.
He was previously the Director of Centre for the Study of Terrorism and Political Violence (CSTPV) at the University of St Andrews, Scotland. He is the author of Hizballah in Lebanon as well as several articles and monographs on terrorism and counter-terrorism. He is on the international editorial advisory board of the academic journal Studies in Conflict and Terrorism and on the editorial boards of two newly launched peer-reviewed journals published by Taylor & Francis: Dynamics of Asymmetric Conflict and Critical Studies on Terrorism. In 2003 he was invited to testify before the first hearing of the 9/11 Commission. He was a member of an Advisory Panel on Terrorism in Europe advising the EU counter-terrorism coordinator. In 2005 he was a contributor to the George C. Marshall Center directed project on "Ideological War on Terror: Synthesizing Strategies Worldwide" (funded by the Office of the US Secretary of Defense). In 2006 Ranstorp was invited to join the European Commission Expert Group on Violent Radicalisation, an official advisory body on all matters relating to violent radicalisation and recruitment of extremists within the EU.
During the early stages of the 22 July 2011 terror attacks in Norway, Ranstorp claimed that the attacks could only have been the work of a network of al-Qaeda operatives, something which was later shown to be false, as the attacks were in fact carried out by a lone, white supremacist perpetrator.
- "Terrorekspert tror Al-Qaida står bak". NRK.no. Retrieved 2 December 2015.