Despite a growing body of research on sexual violence in Irish history, and on recently reported historic sexual offences, few studies have focused on sex offenders who were prosecuted and convicted contemporaneously in the early decades of the Irish Free State. This article examines hitherto restricted archival files on sixty-five offenders who were convicted of unlawful carnal knowledge under the Criminal Law Amendment Act 1885, and, in doing so, constitutes the first comprehensive analysis of convicted sex offenders during the formative years of the independent Irish state. The findings reveal the modus operandi of these perpetrators and that the majority of the victims were exploited by someone who was known to them. The article also challenges the view that there was little recognition of child sexual abuse as a societal problem in the early years of the state and demonstrates that there was an awareness of predatory individuals within Irish communities during this period.