Interfaith marriage is a sensitive and crucial issue for churches in Indonesia and for the religiously plural Indonesian society. This study first deals with the development of civil law, specifically from Marriage Law No. 1/1974. The stances of the churches in Indonesia are wide ranging and include the history of church teaching, biblical interpretation, and church regulations. This contextual church polity study presents a new effort to formulate both a theology of marriage and a family theology, specifically a theology of interfaith marriage, and to formulate a relevant and contextual church order.