As the energy transition accelerates across all 50 states, policymakers are recognizing the inherent value of carbon-free, reliable nuclear energy. Governors, legislators and regulators play a critical role in shaping policies that can enhance the development, demonstration and commercial deployment of a wide array of nuclear technologies. As state officials consider measures that address the changing energy mix, the Nuclear Energy Institute has produced a compendium providing a state-by-state overview of legislation, executive orders, and regulations that have supported nuclear energy since the early 2000s.