Montmerle-sur-Saone is a Saone River cruise port and town in Ain department (eastern France), with population around 4,000.
- The town runs along the river for 3,5 km (2 ml). It is surrounded by the neighboring communities Francheleins Belleville, Montceaux, Guereins, Lurcy, and Saint-Georges-de-Reneins.
- Popular tourist attractions include Chapel Les Minimes (part of former palace demolished in the 19th century, with remaining tower and park), Park La Batellerie, Ile de Montmerle (river island).
- Since 1606, each year In September the town organizes Horses Fair (aka Montmerle Fair).