This chapter examines innovative participatory processes for establishing a social license for reusing data as a global public good. While data reuse creates societal value, it can raise concerns and reinforce power imbalances when individuals and communities lack agency over how their data is reused. To address this, the chapter explores participatory approaches that go beyond traditional consent mechanisms. By engaging data subjects and stakeholders, these approaches aim to build trust and ensure data reuse benefits all parties involved. The chapter presents case studies of participatory approaches to data reuse from various sectors. This includes The GovLab’s New York City “Data Assembly,” which engaged citizens to set conditions for reusing cell phone data during the COVID-19 response. These examples highlight both the potential and challenges of citizen engagement, such as the need to invest in data literacy and other resources to support meaningful public input. The chapter concludes by considering whether participatory processes for data reuse can foster digital self-determination.