This paper elucidates Arab public opinion towards the international aerial campaign against ISIL (the “Islamic State in Iraq and the Levant”) in Iraq and Syria, based on the findings of a dedicated opinion survey. The survey included representative, randomized samples in seven countries: Tunisia, Egypt, Palestine, Jordan, Saudi Arabia and Lebanon, in addition to communities of Syrian refugees in three host countries (Lebanon, Jordan and Turkey). Respondents were asked the extent of their support for the aims of the international campaign as well as the conduct of the airstrikes. Survey questions also take in respondents’ views on a number of related issues. The findings show that the vast majority of Arabs are firmly opposed to ISIL, with only 11% of respondents expressing views which are positive, to varying extents, towards the group.