This guidebook provides information on how interested parties can understand and address prisoner reentry at the local level through mapping and data analysis. The examples and guidance within the report are derived from the experiences of the Reentry Mapping Network (RMN), a collaborative effort by community-based organizations and the Urban Institute designed to create community change through the mapping and analysis of neighborhood-level data on prisoner reentry. This guidebook outlines the concepts and methods underlying the RMN and the lessons learned by RMN partners so that other jurisdictions can learn from these experiences and create more successful reentry strategies in their own communities.