This article offers an analysis of Europol’s security actorness in the external dimension of EU counterterrorism. While Europol has attracted some scholarly attention, not somuch work has focused on the meaning of its international agreements in counterterrorism. This article aims to investigate the international actorness of Europol at theinternational level in relation to the fight against international terrorism. It offers original conceptual insights based on empirical case studies of international agreements: Europol agreements with U.S. law enforcement, as well as Europol agreements with countries in the European Neighbourhood policy