Saint-Didier-sur-Chalaronne

Saint-Didier-sur-Chalaronne is a commune. It is in the Auvergne-Rhône-Alpes region in the Ain department in east France.
Geography.
The Chalaronne (a long river) flows west through the southern part of the commune. It then flows into the Saône, which is part of the commune's south-western border.