Collaborative partnerships can be an effective strategy for crime prevention, especially in disorganized communities. Using ordinary least squares regression with 414 American cities, this article finds that police departments with many collaborative partnerships are able to promote informal social control within their communities and capitalize on the resources available to them with the help of other groups. This contention is supported by the effects of collaborative partnerships on crime rates in disorganized communities in comparison to well-organized communities. Thus, collaborative partnerships of public organizations with other groups may insulate disorganized communities from the effects of community disorganization on levels of crime.