Saint-Sornin (French pronunciation: [sɛ̃ sɔʁnɛ̃]) is a commune in the Charente-Maritime department in southwestern France.

There is only a bar/cafe and a bakery in the village, with the closest shops in Marennes.

There is a small campsite just outside the village on the road to Brue.

The road to Brue is a dead end, but there are some old ruins and a small bird life museum at the end of the road.

This Charente-Maritime geographical article is a stub.