The Evangelical Union was formed in 1843 by James Morison with a controversial doctrinal stance which held that people had considerably more free will in relation to Christian salvation than described by Calvinism which was a highly influential worldview in post-Reformation Scotland.

An Evangelical Union congregation was formed in Langholm around 20 years later, in 1862. A leading participant and financial supporter was Walter Scott who owned a tannery and provided the church’s first meeting room in his bark-house (a storage area for tree bark used in the tanning process).

The church’s own building, designed by local architect James Burnet, was constructed on the corner of Drove Road and Kirk Wynd and opened in 1870 by James Morison.

The Evangelical Union denomination joined the Congregational Union of Scotland in 1896, after which the Langholm congregation became known as the EU Congregational Church. Its combined traditions resulted in emphases on mission and temperance.

In 1915, the leader as minister-to-be was Mr Richard Smith, who was appointed in 1916 and served for three years. His predecessor, Robert MacQueen, served from 1900 to 1913, after studying in Edinburgh and Glasgow.

The church celebrated its centenary in 1970 but closed the year afterwards.