Dionay (French pronunciation: [djɔnɛ]) is a former commune in the Isère department in southeastern France. On 31 December 2015, it was merged into the new commune of Saint-Antoine-l'Abbaye.

Historical population

Year Pop. ±% 1793 424 —     1806 444 +4.7% 1821 495 +11.5% 1831 450 −9.1% 1841 492 +9.3% 1846 477 −3.0% 1851 519 +8.8% 1861 483 −6.9% 1872 409 −15.3% 1881 360 −12.0% 1891 369 +2.5% 1901 468 +26.8% 1911 322 −31.2%

Year Pop. ±% 1921 239 −25.8% 1931 235 −1.7% 1946 221 −6.0% 1954 193 −12.7% 1962 180 −6.7% 1968 147 −18.3% 1975 128 −12.9% 1982 124 −3.1% 1990 103 −16.9% 1999 107 +3.9% 2009 125 +16.8% 2011 120 −4.0%

Dionay is twinned with:

• Sermoneta, Italy, since 2007

• Communes of the Isère department