The municipality launched a Breton linguistic plan through Ya d'ar brezhoneg on 24 February 2005.

The population has been divided by three since the first world war.

Historical population

Year Pop. ±% p.a. 1793 1,644 —     1800 1,633 −0.10% 1806 1,378 −2.79% 1821 1,220 −0.81% 1831 1,458 +1.80% 1836 1,487 +0.39% 1841 1,630 +1.85% 1846 1,704 +0.89% 1851 1,627 −0.92% 1856 1,582 −0.56% 1861 1,646 +0.80% 1866 1,679 +0.40% 1872 1,609 −0.71% 1876 1,639 +0.46% 1881 1,753 +1.35% 1886 1,782 +0.33% 1891 1,804 +0.25% 1896 1,820 +0.18%	Year Pop. ±% p.a. 1901 1,962 +1.51% 1906 2,055 +0.93% 1911 2,159 +0.99% 1921 2,068 −0.43% 1926 2,088 +0.19% 1931 2,035 −0.51% 1936 1,967 −0.68% 1946 1,800 −0.88% 1954 1,513 −2.15% 1962 1,354 −1.38% 1968 1,208 −1.88% 1975 1,013 −2.48% 1982 881 −1.97% 1990 761 −1.81% 1999 696 −0.99% 2009 654 −0.62% 2014 606 −1.51% 2020 590 −0.44%
Graphs are unavailable due to technical issues. Updates on reimplementing the Graph extension, which will be known as the Chart extension, can be found on Phabricator and on MediaWiki.org.
Source: EHESS and INSEE (1968-2020)

Le Saint is located in the northwestern part of Morbihan, 40 km (25 mi) north of Lorient. Historically, it belongs to Cornouaille. Le Saint is border by Gourin to the west and the north, by Langonnet and Le Faouët to the east and by Guiscriff to the south. The river Inam forms the commune's western border and the river Moulin du Duc forms the commune's eastern border. The two rivers meet at the southern end of the commune at a place called Pont Briand. Apart from the village centre there are about eighty hamlets.

The lords of Faouët, the Bouteville, lived in their castle in Le Saint in the fifteenth century.

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  The church.
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  The chapel of Saint-Méen.
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  Fountain of Saint-Méen.
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  The chapel of Saint-Trémeur.
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  Oratory of Bouthiry.

• Communes of the Morbihan department

Wikimedia Commons has media related to Le Saint.

• Base Mérimée: Search for heritage in the commune, Ministère français de la Culture. (in French)
• Mayors of Morbihan Association (in French)

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