Kermorvan lighthouse, Coastal navigation lighthouse in Le Conquet, France

Kermorvan lighthouse is a square granite tower about 20 metres tall, rising from a rock at the tip of the Kermorvan peninsula in Le Conquet. Its grey-brown stone shaft has a projecting gallery with a crenellated parapet, above which sits a glazed lantern under a black dome. A granite bridge links the rock to the mainland.

Construction began in 1847 and the lighthouse entered service in 1849 on a rock at the tip of the Kermorvan peninsula. It links the lighthouses of Saint-Mathieu and Trézien along the Chenal du Four, the passage between the mainland and the Molène archipelago. The peninsula was fortified from the Middle Ages; batteries near the tower were built to Vauban's plans at the end of the 17th century, and casemates and concrete works date from the German occupation in the Second World War.

The tower is aligned with the Lochrist, Trézien and Saint-Mathieu lighthouses to mark the Helle and Four channels, the sea route between the mainland and the Molène archipelago. The peninsula itself was fortified from the Middle Ages; near the lighthouse stand batteries built to Vauban's plans at the end of the 17th century, later extended against English and British naval attacks. Casemates and concrete structures were added by Organisation Todt and German troops in World War II. In 2005 the site served as a filming location for the TF1 television series Dolmen.

The tower stands on a rock at the tip of the Kermorvan peninsula, reached by a granite bridge from the mainland. The peninsula is a protected site managed by the Conservatoire du littoral. The lighthouse has been open to visitors since 1 July 2022; it is telecontrolled from Brest.

The tower is the westernmost lighthouse on the French mainland, and since 1994 it has been remotely controlled from Brest. Its light reaches 22 nautical miles, linking the lighthouses of Saint-Mathieu and Trézien along the Chenal du Four. In 2005 it appeared in the TF1 television series Dolmen.