The Protestant Church in Germany (Evangelische Kirche in Deutschland, EKD), formerly known in English as the Evangelical Church in Germany, is a federation of twenty Lutheran, Reformed (Calvinist) and United (e.g. Prussian Union) Protestant regional churches and denominations in Germany, collectively encompassing the country's vast majority of Protestants. In 2020, the EKD had a membership of 20,236,000 members, or 24.3% of the German population. It constitutes one of the largest Protestant bodies in the world. Church offices managing the federation are located in Herrenhausen, Hanover, Lower Saxony. Many of its members consider themselves Lutherans.
Historically, the first formal attempt to unify German Protestantism occurred during the Weimar Republic era in the form of the German Protestant Church Confederation, which existed from 1922 until 1933. Earlier, there had been successful royal efforts at unity in various German states, beginning with Prussia and several minor German states (e.g. Duchy of Nassau) in 1817. These unions resulted in the first united and uniting churches, a new development within Protestantism which later spread to other parts of the world. When Adolf Hitler came to power in 1933, his administration tried to reorganize the old confederation into a unified German Evangelical Church as Hitler wanted to use a single Protestant church to further his own ambitions. However, a division emerged between the Reichskirche, led by the pro-government German Christians, and the Confessing Church, which opposed state control of the church. Other Protestant churches aligned themselves with one of these groups, or stayed neutral in this church strife. The postwar church council issued the Stuttgart Declaration of Guilt on 19 October 1945, confessing guilt and declaring remorse for indifference and inaction of German Protestants in the face of atrocities committed by Hitler's regime. In 1948, the Protestant Church in Germany was organized in the aftermath of World War II to function as a new umbrella organization for German Protestant churches.