First Congregational Church is a member of the Metropolitan Boston Association in the Massachusetts Conference of the United Church of Christ.
The United Church of Christ is the largest Protestant denomination in Massachusetts. The UCC was formed in 1957 in Cleveland, Ohio, when the Evangelical and Reformed Church (who had merged 23 years prior), and the Congregational Christian Churches (who had merged 26 years prior) joined together to form the United Church of Christ. This new church embodied the essence of both parents, a complement of freedom with order, of the English and European Reformations with the American Awakenings, of separatism with 20th-century ecumenism, of Presbyterian with Congregational polities, of nonorthodox with liberal theologies. On that day, two million members joined hands. There are more that 5,000 UCC churches in the United States.
The United Church of Christ continues to balance religious tradition with new ideas for religion that is relevant. God is still speaking.