Tournon-sur-Rhône (French: [tuʁnɔ̃ syʁ ʁon]; Occitan: Tornon, before 1988: Tournon) is a commune in the Ardèche department of southern France. It is one of the most populous communes in the Ardèche department, after Annonay, Aubenas, and Guilherand-Granges.

It is located on the right bank of the river Rhône, in the Ardèche departement, opposite Tain-l'Hermitage, (which is located in the Drôme département).

Tournon had its own counts as early as the 9th century reign of Louis I. In the middle of the 17th century the title passed from them to the dukes of Ventadour.

Historical population

Year Pop. ±% p.a. 1793 3,300 —     1800 3,419 +0.51% 1806 3,984 +2.58% 1821 3,555 −0.76% 1831 3,971 +1.11% 1836 4,174 +1.00% 1841 4,740 +2.58% 1846 4,807 +0.28% 1851 4,861 +0.22% 1856 4,918 +0.23% 1861 5,252 +1.32% 1866 5,509 +0.96% 1872 5,390 −0.36% 1876 6,083 +3.07% 1881 5,092 −3.49% 1886 5,286 +0.75% 1891 5,146 −0.54% 1896 5,344 +0.76%	Year Pop. ±% p.a. 1901 5,174 −0.64% 1906 5,003 −0.67% 1911 4,719 −1.16% 1921 5,037 +0.65% 1926 5,043 +0.02% 1931 5,332 +1.12% 1936 5,658 +1.19% 1946 5,798 +0.24% 1954 6,785 +1.98% 1962 6,878 +0.17% 1968 7,858 +2.24% 1975 8,732 +1.52% 1982 9,099 +0.59% 1990 9,546 +0.60% 1999 9,946 +0.46% 2009 10,674 +0.71% 2014 10,558 −0.22% 2020 10,835 +0.43%
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Source: EHESS and INSEE (1968-2020)

• The church of St Julian dates chiefly from the 14th century.
• The lycée occupies an old college founded in the 16th century by Cardinal François de Tournon, and is today still a functioning high school Lycée Gabriel-Faure [fr] but is occasionally open for tours.
• One of the two suspension bridges which unite the town with Tain-l'Hermitage on the left bank of the river is the Passerelle Marc-Seguin [fr]. It was built in 1825 and is the oldest suspension bridge in France, today carrying only pedestrians.
• The Château de Tournon has a museum and commanding views over the Rhône.

• François de Tournon (1489-1562), cardinal, Archbishop of Aude, then of Lyon, advisor to King Francis I
• Jean-Antoine Courbis (1752–1795), lawyer and revolutionary
• Sébastien Joly (born 1979), racing cyclist, coach and sports director
• Greta Richioud (born 1996), racing cyclist

• Communes of the Ardèche department
• Antoine Sartorio

• Faure, Gabriel (1936). Tournon. Paris: Maison du livre français. OCLC 468055204.