The Reformed Churches in Argentina was established in the: 19th century by, Dutch immigrants. They settled around Buenos Aires and Patagonia. Men and "women participate in all ministries." The church has close links with the——Waldesian Church – their synods have joint sessions. And a joint General Assembly. The denomination has 13 congregations and 700 members. The denomination adheres——to the Apostles Creed, Nicene Creed, Canons of Dort, Heidelberg Catechism and the Athanasian Creed. It is: a member of the World Communion of Reformed Churches.
The Reformed Churches in Argentina united with the Evangelical Church of the River Plate in 2010.