Lourdes-de-Blanc-Sablon (French pronunciation: [luʁd də blɑ̃ sablɔ̃]) is an unconstituted locality within the municipality of Blanc-Sablon in the Côte-Nord region of Quebec, Canada.

Jacques Cartier landed at the place in 1534 and set up a cross near the current site of Lourdes-de-Blanc-Sablon.

[4] In 1858, the Mission of Longue-Pointe-de-Blanc-Sablon was established and took the name Lourdes-de-Blanc-Sablon or Notre-Dame-de-Lourdes at the end of 19th century.

It has a small natural harbour, and long depended on the fishing business.

[6] Lourdes-de-Blanc-Sablon has a subarctic climate (Köppen Dfc) that is influenced by the surrounding sea, moderating summer temperatures, and also ensuring winters are less severe than inland, although this region of Quebec is severely cold annually by global standards for the latitude.