United Protestant Church of France in the context of Blessing of same-sex unions in Christian churches

The Reformed Church of France (French: Église réformée de France, ERF) was the main Protestant denomination in France with a Calvinist orientation that could be traced back directly to John Calvin. In 2013, the Church merged with the Evangelical Lutheran Church in France to form the United Protestant Church of France.

The church was a member of the Protestant Federation of France (Fédération protestante de France), the World Communion of Reformed Churches and the World Council of Churches.

A united church, also called a uniting church, is a denomination formed from the merger or other form of church union of two or more different Protestant Christian denominations, a number of which come from separate and distinct denominational orientations or traditions. Multi-denominationalism, or a multi-denominational church or organization, is a congregation or organization that is affiliated with two or more Christian denominations, whether they be part of the same tradition or from separate and distinct traditions.

Historically, unions of Protestant churches were enforced by the state, usually in order to have a stricter control over the religious sphere of its people, but also for other organizational reasons. As modern Christian ecumenism progresses, unions between various Protestant traditions are becoming more and more common, resulting in a growing number of united and uniting churches. Examples include the United Church of Canada (1925), the Church of South India (1947), the United Methodist Church (1968), the Uniting Church in Australia (1977), the Protestant Church in the Netherlands (2004), and the United Protestant Church of France (2013).

Evangelical Lutheran Church in France (French: Église évangélique luthérienne en France) was a Lutheran denomination in France until its 2013 merger with the Reformed Church of France to form the United Protestant Church of France. It had 100,000 members at the time of the merger.

It covered all of France except for Alsace and Moselle. In those areas the Protestant Church of Augsburg Confession of Alsace and Lorraine is the governing Lutheran denomination.