Jassans-Riottier (French pronunciation: [ʒasɑ̃ ʁjɔtje]), known colloquially as Jassans, is a commune in the Ain department in eastern France.

Jassans is located in the south-western part of the Ain department in the fertile Val de Saône some 35 km north of Lyon and 2 km east of Villefranche-sur-Saône.

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