A large rail yard was built in the municipality following the construction of a railway in 1860, now part of the Simplon Railway. Between 1898 and 1940, the power plant Bois Noir, supplied the city of Lausanne with electricity. However, the municipality was not industrialized until much later. The first major industrial plant was a cement factory that was in operation from the 1950s until 1986. In 1934 the Saint-Augustin printing house opened in town. The newspaper "valaisan Nouvelliste" (New Valais) was founded in 1903 in Saint-Maurice. It was renamed the "Feuille d'Avis Nouvelliste et du Valais" in 1968. The "Echos de Saint-Maurice" was first published in 1899, and in 2000 became the "Nouvelles de l'Abbaye". The "La Patrie Valaisanne" was published between 1927 and 1969. It then became the CVP party newspaper under the title "Valais Demain" until it closed in 1997.