Although researchers acknowledge the importance of replication in building scientific knowledge, replication studies seem to be published infrequently. The present study examines the extent to which replications are conducted in criminology. We conduct a content analysis of the five most influential journals in criminology. We also compare the replication rate in criminology with that in the social sciences and natural sciences. The results show that replication research is rarely published in these disciplines. In criminology journals in particular, replication studies constitute just over 2 percent of the articles published between 2006 and 2010. Further, those replication studies that were published in criminology journals in that period tended to conflict with the original studies. These findings call into question the utility of empirical results published in criminology journals for developing theory and policy. Strategies for promoting replication research in criminology are suggested.