Ars-sur-Formans (Franco-Provençal: Ârs) is a commune in the Ain department in the Auvergne-Rhône-Alpes region of eastern France.

Ars-sur-Formans is on the Dombes Plateau, while to the west it borders the fertile hills of the Val de Saône.

Long known simply as Ars, the commune changed its name to Ars-sur-Formans by a decree dated 12 October 1956, published in the Official Journal on the 18th of the same month.

[6] Since the mid-19th century, the name of Ars is associated with Jean-Marie Vianney, the former parish priest venerated as a saint by the Catholic Church.

On 6 October 1986, Pope John Paul II travelled to Ars-sur-Formans as part of his third visit to France.