The Welsh Methodist revival was an evangelical revival that revitalised Christianity in Wales during the 18th century. Methodist preachers such as Daniel Rowland, William Williams and Howell Harris were heavily influential in the movement. The revival led eventually to the establishment of the Welsh Calvinistic Methodists as a denomination and it also revitalised older dissenting churches.

Representing 43.6% of the Welsh population in 2021, Christianity is the largest religion in Wales. Wales has a strong tradition of nonconformism, particularly Methodism. From 1534 until 1920 the established church was the Church of England, but this was disestablished in Wales in 1920, becoming the still Anglican but self-governing Church in Wales.