Studies confirm differences between participants and nonparticipants in voluntary organizations in general as well as those for crime prevention. Participants are more stable, longer residents, and attached residents with better socioeconomic status. Yet, previous studies have not thoroughly considered neighborhood conditions. A few studies show the overall participation-rate differences across neighborhoods without considering whether individuals residing in neighborhoods with different conditions show dissimilar patterns of participation. In addition, studies rarely consider the crime-related problems of communities. This study examines the differences between participants and nonparticipants in neighborhood crime-prevention associations with particular attention paid to the neighborhood-related factors, including crime problems. In addition, whether individual-related characteristics show the same or similar impact on participation when the community social context is in consideration is another question to be answered. It is revealed that individual- and neighborhood-related factors differentiate the residents’ participation. In particular, crime problems of the neighborhood affect participation in crime-prevention associations.