This document summarizes the results of an online poll conducted by Ipsos in December 2014 on US public opinion regarding the International Criminal Court. The poll interviewed 1,004 adults and included questions on knowledge of and attitudes toward the ICC, as well as US participation and support for ICC prosecution of individuals for ISIS war crimes. Key findings include: 64% of respondents said they knew nothing at all about the ICC, while support for US involvement or membership in the ICC ranged from 37-42% depending on the question.