ST., a town of France, in the department of Ille-et-Vilaine, on the south side of the harbour of St Malo, at the mouth of the Rance, in the English Channel. It is a suburb of St Malo, and a favourite watering-place. The most remarkable building is an isolated tower, now used as a prison. This edifice stands on a rock, between the two harbours, and is approached by a drawbridge. One of the harbours is suitable for large, the other for small vessels. Shipbuilding is carried on here; many of the inhabitants are employed in cod-fishing; and there is a considerable trade in beer, wine, brandy, ship-biscuits, cordage, &c. Pop. 10,257.