Le Merlerault (French pronunciation: [lə mɛʁləʁo] ) is a former commune in the Orne department in north-western France. On 1 January 2025, it was merged into the new commune of Merlerault-le-Pin.

The Commune is one of 30 communes that make up the Natura 2000 protected area of Bocages et vergers du sud Pays d'Auge.

Le Merlerault along with another 70 communes is part of a 20,593 hectare, Natura 2000 conservation area, called the Haute vallée de l'Orne et affluents.

• Ensemble castral remains of a medieval residence with a circular mound, it was registered as a Monument historique 1989.

• Foulques du Merle - (1239 - 1314) was Seigneur of Gacé and Bellou-en-Houlme, and Baron of Le Merlerault, Briouze and Messei.
• François Pouqueville - (1770 – 1838) a French diplomat, writer, explorer, physician and historian, and member of the Institut de France was born here.
• Léon Labbé - (1832 – 1916) a French surgeon and politician was born here.

The arms of Le Merlerault are blazoned : Argent, a blackbird sable, on a chief azure a heart argent between 2 fleurs de lys Or.

Le Merlerault is twinned with:

• Collingbourne Ducis, United Kingdom (since 1992)

• Communes of the Orne department