Two studies used random sample surveys to test the “contact hypothesis” on intergroup attitudes of Catholics and Protestants in Northern Ireland. In Study 1, archival data from two different surveys in 1989 (N = 310 Catholics, 422 Protestants) and 1991 (N = 319 Catholics, 478 Protestants) showed that contact was positively related to attitudes toward denominational mixing. Study 2 (N = 391 Catholics, 647 Protestants) explored predictors of intergroup forgiveness, and also showed that intergroup contact was positively related to outgroup attitudes, perspective-taking, and trust (even among those who had a worse experience of sectarian conflict). These studies indicate that research in peace psychology can provide a deeper understanding of the conflict in Northern Ireland and, in due course, contribute to its resolution.