The Amish affirm classical Trinitarian doctrine: one God eternally existing as Father, Son, and Holy Spirit. Their primary confessional document, the Dordrecht Confession of Faith (1632), affirms this foundational belief. The Trinity shapes Amish baptismal practice (in the name of the Father, Son, and Spirit) and their understanding of salvation and community life.

The Amish do not engage in elaborate theological speculation about the nature of the Trinity; their focus is on practical obedience and community formation rather than systematic doctrine. But the Trinitarian faith expressed in the Dordrecht Confession is foundational and unquestioned.