Policy surveillance is the ongoing, systematic collection, analysis, and dissemination of data about laws and policies. There is a long tradition of conducting “50 state surveys” to identify laws of public health signiﬁcance, but the methods for creating these surveys are largely unscientific. Unlike this traditional legal research, policy surveillance uses systematic quantitative and qualitative coding to create scientific datasets and track policies over time. Throughout the past year the Robert Wood Johnson Foundation’s Public Health Law Research program, the Network for Public Health Law, ChangeLab Solutions and the CDC Public Health Law Program have been exploring policy surveillance through a Delphi process and within their programs. This webinar will present the findings from that Delphi study and will explore the role of policy surveillance in understanding the impact of law on public health.