Saint-Martin-au-Laërt (French pronunciation: [sɛ̃ maʁtɛ̃ o laʁ]; West Flemish: Sint-Maartens-Aard) is a former commune in the Pas-de-Calais department in northern France.

On 1 January 2016, it was merged into the new commune Saint-Martin-lez-Tatinghem.

[2] Saint-Martin-au-Laërt is a farming and light industrial suburb to the northwest of Saint-Omer on the D928 and D923 roads.

The inhabitants are called Saint-Martinois.

This Pas-de-Calais geographical article is a stub.