This study, based on a survey of 4,505 households in metropolitan New York, demonstrates a relationship between divorce and group commitment. The findings indicate that Jews who have a greater group commitment on a variety of variables are consistently less likely ever to have been divorced. Although the religious basis for group commitment has the largest impact, the ethnic component is also influential, even among those low in religious involvement. Further analyses reveal that the preexisting level of group commitment has an effect on marital stability. These findings are discussed within the framework of individualism, the family, and social integration.