The Criminal Justice Sectoral Strategy 2022 – 2024 highlights the importance of data as a driver. Specifically, it highlights the importance of data in order to identify new and emerging trends as well as inform the development of evidenced based policy. Across the Criminal Justice System there is a significant volume of information held that could be used to drive such insights and policy formation. Indeed, one of the challenges is to actually be fully aware of the breadth of information that is captured on system spanning An Garda Síochána, the Office of the Director of Public Prosecutions, the Courts Service, the Irish Prison Service and the Probation Service. This document provides a high level data catalogue of key Criminal Justice data bases through a data catalogue.