Research on civil conflict focuses primarily on identifying underlying and proximate causes while leaving many questions of subsequent social consequences unanswered. Few studies have systematically examined how these conflicts affect public opinion, especially tolerance attitudes. Additionally, cross-national comparisons reveal significant differences in political tolerance levels but few explanations accounting for this variation. In this study, I bring together these disparate literatures and demonstrate the negative, independent effects of civil conflict on political tolerance levels across thirty-two countries. Examining data from the 1995–97 World Values Survey using several statistical techniques to ameliorate problems with endogeneity and multilevel data, I find that civil conflict dampens the public’s willingness to extend basic civil liberties to nonconformist groups. By assessing the extent of domestic intolerance generated by various forms of civil conflict, this study makes important contributions to existing literatures and, more importantly, identify another obstacle to sustained peace in postconflict societies.