Saint-Étienne-sur-Reyssouze (French pronunciation: [sɛ̃.t‿etjɛn syʁ ʁɛsuz], literally Saint-Étienne on Reyssouze) is a commune in the Ain department in eastern France.

Сент-Етьєн-сюр-Рейссуз є частиною регіону Бресса.

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