There is limited research examining community and neighborhood influences on prosociality in children and youth. In this chapter we outline three relevant theories that address how neighborhood and community processes influence prosocial behavior and review the empirical literature on the topic. Our review suggests that measures of neighborhood socioeconomic status, demography, and disorder have little direct association with prosociality in children and youth but that adolescent prosocial behavior is linked to social capital and collective efficacy. The community intervention evidence shows that providing increased opportunities for prosocial involvement may support greater prosocial behavior of adolescents, possibly by boosting community social capital. Further development of more specific theoretical models and further empirical research is required to better understand the complex neighborhood and community mechanisms across neighborhoods, cities, nations, and cultures.