Continued growth in the number of individuals with dementia residing in assisted living (AL) raises concerns about their safety and protection. However, unlike federally-regulated nursing facilities, AL is state-regulated and there is a high degree of variation among policies designed to protect persons with dementia. Despite the important role these protection policies have in shaping the quality of life of persons with dementia residing in AL, little is known about their formation. In this research, we examined the adoption of AL protection policies pertaining to staffing, the physical environment, and the use of chemical restraints. For each protection policy type, we modeled policy rigor using an innovative point-in-time approach, incorporating variables associated with state contextual, institutional, political, and external factors. We found that the rate of state AL protection policy adoptions remained steady over the study period, with staffing policies becoming less rigorous over time. Variables reflecting institutional policymaking, including legislative professionalism and bureaucratic oversight were associated with the rigor of state AL dementia protection policies. As we continue to evaluate the mechanisms contributing to the rigor of AL protection policies, it seems organized advocacy efforts might expand their role in educating state policymakers about the importance of protecting persons with dementia residing in AL and moving to advance appropriate policies.