Lézardrieux is a commune in the Côtes-d'Armor department of Brittany in northwestern France.
The village is situated near the mouth of the estuary of the Trieux river - the suspension bridge across the river at this point is a French national monument. There is a marina with moorings for several hundred pleasure boats and the tidal range experienced is remarkable
There are a variety of shops and other commercial enterprises - including two bakeries, a butcher and several restaurants and bars.