Mennonites affirm the classical Trinitarian doctrine of God: one Being existing as Father, Son, and Holy Spirit — three co-equal, co-eternal persons. The Mennonite Confession of Faith (1995) of Mennonite Church USA and Mennonite Church Canada explicitly affirms Trinitarian faith.

The Anabaptist tradition's emphasis on community discernment, Scripture reading, and the presence of the Spirit in the gathered congregation is embedded in a Trinitarian framework: the Father's purposes revealed in Scripture, the Son's example of costly discipleship, and the Spirit's guidance of the community.