The centre of the town is the place de la République, which contains an 18th century town hall and a covered market. The neighbouring square, contains a 17th century church dedicated to Saint Gildas with a Renaissance porch.
The harbour area of Saint Goustan contains half-timbered 15th and 16th century houses built around cobbled streets, and a 17th century stone bridge (Called Pont Neuf - New Bridge) crossing the River Loch.
As of the census of 1999, the town has a population of .
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