Montoir-de-Bretagne (French pronunciation: [mɔ̃twaʁ də bʁətaɲ] , literally Montoir of Brittany; Gallo: Montoér or Montouèrr, Breton: Mouster-al-Loc'h) is a commune in the Loire-Atlantique department in western France.

The population data given in the table below refer to the commune of Montoir-de-Bretagne in its geography at the given years. In 1913 the commune of Trignac was created from part of Montoir-de-Bretagne, in 1925 Saint-Malo-de-Guersac was created from part of Montoir-de-Bretagne.

Historical population

Year Pop. ±% p.a. 1793 3,119 —     1800 3,149 +0.14% 1806 3,577 +2.15% 1821 3,871 +0.53% 1831 3,985 +0.29% 1841 4,500 +1.22% 1846 4,572 +0.32% 1851 5,023 +1.90% 1856 5,269 +0.96% 1861 5,388 +0.45% 1866 4,527 −3.42% 1872 4,859 +1.19% 1876 4,603 −1.34% 1881 5,412 +3.29% 1886 7,225 +5.95% 1891 6,942 −0.80% 1896 8,277 +3.58% 1901 10,272 +4.41%	Year Pop. ±% p.a. 1906 9,756 −1.03% 1911 10,739 +1.94% 1921 6,285 −5.22% 1926 3,860 −9.29% 1931 3,698 −0.85% 1936 3,592 −0.58% 1946 3,681 +0.25% 1954 4,695 +3.09% 1962 4,658 −0.10% 1968 5,171 +1.76% 1975 5,352 +0.49% 1982 5,772 +1.09% 1990 6,585 +1.66% 1999 6,204 −0.66% 2007 6,298 +0.19% 2012 6,950 +1.99% 2017 7,088 +0.39%
Source: EHESS and INSEE (1968-2017)

• Brière
• Communes of the Loire-Atlantique department