Andover Newton Seminary maintains active ties with denominational leaders in the American Baptist Churches (USA) and the United Church of Christ. Due to shared history and current practices, Andover Newton also collaborates with the Unitarian Universalist Association, the Alliance of Baptists, the Christian Church (Disciples of Christ), the Cooperative Baptist Fellowship (CBF), and the National Association of Congregational Chiristian Churches (NACCC).

By attending national gatherings of these traditions and their affiliates, Andover Newton builds bridges students can use to connect with the traditions in which they seek to minister.