A citation analysis of two preeminent terrorism journals ("Terrorism and Political Violence" and "Studies in Conflict and Terrorism") was used to identify 37 additional social science journals of significant importance to terrorism research. Citation data extracted from the "Web of Science" database was used to investigate the impact of the two journals on the social science journal literature. The impact of the two journals was also analyzed in terms of SSCI subject categories. This study could provide useful information for collection development librarians interested in the social sciences.