This study examined adolescents' beliefs about the amount of punishment individuals should receive for violating different laws and whether these beliefs are connected with their informational assumptions (i.e., perceived facts) about crime, laws, and authority. American adolescents (N = 340; M age = 16.64, 58.2% female) reported their judgments concerning the appropriate punishment for violating laws regulating domain-specific behaviors and their informational assumptions regarding the prevalence and causes of crime, beliefs that authority is knowledgeable, and the purpose of punishment. Greater internal attributions for crime was associated with stronger punishment judgments for violating laws that regulate moral and conventional issues. Greater beliefs that punishment teaches right from wrong was associated with stronger punishment judgments for violating laws that regulate drug-related prudential issues, and lower punishment judgments for violating laws that regulate personal issues. Greater beliefs that authorities are more knowledgeable than others was associated with stronger punishment judgments for violating laws that regulate personal issues.Adolescence is a developmental period characterized by substantial gains in sociopolitical understanding and greater contact with social and legal organizations (Moffitt, 1993;Smetana & Villalobos, 2009). During adolescence, youth are forming more nuanced beliefs about the nature and role of social and political systems, including whether certain issues should be subject to social regulation and how authorities should respond if these laws are violated. Adolescents' concepts of law-breaking and punishment are pertinent components of their sociopolitical understanding (Oosterhoff & Metzger, 2017), because they have important implications for social and political attitudes and behavior. For instance, beliefs about punishment for law-breaking are foundational to attitudes concerning social policies and practices involving the criminal justice system, such as length of prison sentences, use of the death penalty, and readiness to criminalize socially disapproved behaviors (Duckitt, 2009). Adolescents' beliefs about punishment may also have implications for their involvement in delinquency, as youth who ascribe greater punishment for law violations are less likely to engage in delinquent behaviors themselves .To date, the majority of research examining beliefs about punishment has utilized adult samples and has focused on support for the death penalty or longer prison sentences. Less is known about youths' ascriptions of punishment for violating laws that regulate different forms of crime and delinquency, or how these beliefs intersect with other facets of their emerging sociopolitical understanding. Social domain scholars propose that variation in social beliefs may be explained by differences in "informational assumptions," which represent an individual's perceived fact-based understanding of social events and behaviors (Wainryb, 1991).