Policies are an important part of public health interventions, including in the area of sexually transmitted disease (STD) prevention. Similar to other tools used in public health, policies are often evaluated to determine their usefulness. Therefore, we conducted a nonsystematic review of policy evidence for STD prevention. Our review considers assessments or evaluations of STD prevention–specific policies, health care system policies, and other, broader policies that have the potential to impact STD prevention through social determinants of health. We also describe potential policy opportunity in these areas. It should be noted that we found gaps in policy evidence for some areas; thus, additional research would be useful for public health policy interventions for STD prevention.