The Urban Institute partnered with local research organizations in three sites to learn more about children of incarcerated parents through the merging and analysis of local and state level criminal justice and human services data. The purpose of the project was to better understand the experiences and needs of children of incarcerated parents in each locality and to explore the involvement of affected families with the criminal justice, child welfare, and social welfare systems. This report presents findings from the sites and lessons learned regarding the merging and analysis of administrative data on this population.