Josselin (French pronunciation: [ʒɔslɛ̃] ⓘ; Breton: Josilin) is a commune in the Morbihan department in Brittany in northwestern France.

An alternative explanation for the location of the chapel concerns a labourer who in 808 discovered a wooden statue in the brambles which enabled his hitherto blind daughter to see.

A chapel was constructed on the site of this miracle which subsequently grew into a church (parts of which date back to the twelfth century).

In 1351, during the Breton War of Succession (part of the Hundred Years' War), two groups of approximately 30 English knights (led by Robert Bramborough, the English captain of Ploërmel) and Franco-Breton knights (commanded by Jean de Beaumanoir, captain of Josselin) staged an arranged combat at a spot halfway between the Chateau de Josselin and Ploërmel.

The Franco-Breton side eventually won after killing or capturing the English force, including Bramborough.