It is the third-largest suburb of the city of Nantes, and is adjacent to it on the southeast, across the river Loire. It has two railway stations on the line to Clisson: Saint-Sébastien-Pas-Enchantés and Saint-Sébastien-Frêne-Rond.

The territory of the commune was occupied at the earliest 3,000 years before our era.

During the Revolution, despite its proximity to Nantes, the commune sided massively against the Republic and joined the Vendée insurrection of March 1793.

Historical population

Year Pop. ±% p.a. 1793 2,507 —     1800 1,353 −8.43% 1806 1,377 +0.29% 1821 1,573 +0.89% 1831 1,605 +0.20% 1841 1,886 +1.63% 1846 1,985 +1.03% 1851 2,016 +0.31% 1856 1,976 −0.40% 1861 2,066 +0.89% 1866 2,349 +2.60% 1872 2,260 −0.64% 1876 2,340 +0.87% 1881 2,315 −0.21% 1886 2,419 +0.88% 1891 2,440 +0.17% 1896 2,497 +0.46% 1901 2,498 +0.01%	Year Pop. ±% p.a. 1906 2,610 +0.88% 1911 2,740 +0.98% 1921 3,096 +1.23% 1926 3,584 +2.97% 1931 4,534 +4.81% 1936 5,113 +2.43% 1946 6,637 +2.64% 1954 8,427 +3.03% 1962 11,830 +4.33% 1968 14,159 +3.04% 1975 17,326 +2.93% 1982 17,825 +0.41% 1990 22,202 +2.78% 1999 25,223 +1.43% 2007 24,724 −0.25% 2012 25,655 +0.74% 2017 26,838 +0.91%
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 (1968-2017)

Saint-Sébastien-sur-Loire is twinned with:

• Cernavodă, Romania
• Glinde, Germany
• Kaposvár, Hungary
• Kati, Mali
• Porthcawl, Wales

• Héloïse Adelaïde Letissier(born 1 June 1988) (age 31), professionally known as Christine and the Queens or simply Chris, is a French singer, songwriter and producer.
• Clara Hervouet
• Giovanni Sio (born 31 March 1989), footballer
• Nates Geovannie, rugby player

• Communes of the Loire-Atlantique department

• Official website Archived 3 March 2016 at the Wayback Machine (in French)

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