One of the oldest continuously used places of worship in this province. St. John's Church was erected by the Presbyterians of Mt. Stewart and vicinity in 1853. 

In her recent book, "Small Churches of Canada", author Kim Ondaatje declares the structure to be one of the most beautiful buildings of its type in Canada. Architectural features worthy of note include the vertical and horizontal wainscotting of the interior walls, the star-topped gothic windows, the World War I memorial window depicting the Angels of Victory and, of course, the ceiling. 

In 1925 the majority of the St. John's members were joined by the Mt. Stewart Methodists in the formation of a congregation of the United Church of Canada. In 1961 Donaldston became part of the congregation.