The United Church of Christ (UCC) is a mainline Protestant Christian denomination based in the United States, with historical and confessional roots in the Anabaptist, Congregational, Continental Reformed, Lutheran, and Restorationist traditions, and with approximately 4,600 churches and 712,000 members. The UCC is a historical continuation of the General Council of Congregational Christian churches founded under the influence of New England Puritanism. Moreover, it also subsumed the third largest Calvinist group in the country, the German Reformed. Notably, its modern members have theological and socioeconomic stances which are often very different from those of its predecessors.
The Evangelical and Reformed Church, General Council of the Congregational Christian Churches, and the Afro-Christian Convention, united on June 25, 1957, to form the UCC. The Evangelical and Reformed Church and the General Council of Congregational Christian Churches were themselves the result of earlier unions and had their roots in Congregational, Lutheran, Evangelical, and Reformed denominations. At the end of 2014, the UCC's 5,116 congregations claimed 979,239 members, primarily in the U.S. In 2025, Pew Research estimated that 0.4 percent of the U.S. population, or 1.1 million adult adherents, self-identified with the United Church of Christ.
