Meslan (French pronunciation: [melɑ̃]; Breton: Mêlann) is a commune in the Morbihan department of Brittany in north-western France.

The river Ellé forms the western border of the commune.

The parish church, placed under the patronage of Saint Mélaine, was rebuilt in 1577.

The oldest surviving parish registers date back to 1678.

The first mayor of Meslan, Louis Trouboul, was murdered by a gang of chouans on the night of January 9 to 10, 1795.