The first settlers, mainly from Saint-Pierre-du-Portage (L’Assomption) and Saint-Sulpice, cleared the territory gradually.

In April 1922, the more urban sector of Conversion-de-Saint-Paul split away to form the new village municipality of Saint-Paul.

Meanwhile the rural Conversion-de-Saint-Paul would eventually change its name to only Saint-Paul, in 1954, to become the current municipality.

There are major artistic pieces there, notably the canvas illustrating the preaching is the work of the painter Louis Dulongpré.

In addition, a good part of the ornamentation with gold leaf, the sounding board as well as the Easter candlestick are the work of the sculptor Pierre Guibord who was also the first mayor of Saint-Paul.