Saint-Jean-d'Étreux (French pronunciation: [sɛ̃ ʒɑ̃ detʁø]) is a former commune in the Jura department in the Bourgogne-Franche-Comté region in eastern France. On 1 January 2019, it was merged into the commune Les Trois-Châteaux.

Historical population

Year Pop. ±% 1793 577 —     1806 215 −62.7% 1821 224 +4.2% 1831 376 +67.9% 1841 355 −5.6% 1851 353 −0.6% 1861 312 −11.6% 1872 308 −1.3% 1881 301 −2.3% 1891 264 −12.3% 1901 252 −4.5% 1911 228 −9.5%

Year Pop. ±% 1921 183 −19.7% 1931 165 −9.8% 1946 171 +3.6% 1954 166 −2.9% 1962 166 +0.0% 1968 146 −12.0% 1975 159 +8.9% 1982 133 −16.4% 1990 137 +3.0% 1999 126 −8.0% 2008 142 +12.7% 2013 159 +12.0%

• Communes of the Jura department