This study offers an inventory of elite and public opinion surveys on EU foreign and security policy (EUFSP). It first provides an analytical overview of the most relevant literature and data on the topic while exploring the theme of foreign and security policy from the angle of political elites’ attitudes and beliefs. In the second section, it focuses on the mass level, using public opinion data collected over the last two decades to explore European publics’ support for EUFSP and their willingness to accept more integration in foreign and defence matters.