The value of using administrative records for operational and evaluation purposes has been well established in health and human services. However, these records typically reflect the reach of a single government agency or program and fail to capture the experiences of individuals as they engage with different agencies or programs over time. Thus, the potential for these data to improve everyday operations, coordinate services, develop targeted interventions, and advance the science behind broader social policies has yet to be fully realized. A first step toward realizing that potential is to transition from an agency-centered to a client- or person-centered organization of data. We systematically linked tens of millions of records across California’s largest health and human services programs. Our results underscore how the integration of records can help shift discussions from the programs that administer services to the people who are served.