Ars-sur-Formans is a commune. It is found in the Auvergne-Rhône-Alpes region in the Ain department in the east of France. In 2009, 1,326 people lived in the commune. The inhabitants are the "Arsois". The most important monuments in the commune are the Ars basilica, built in 1862, and the "Presbytère du curé d'Ars", located at the side of the basilica, and which contains a relic (his heart) of Jean-Marie Vianney, "curé" of Ars in the 19th century. The commune is twinned with Freihalden in Germany since 1977.