The canton of Conflans-en-Jarnisy (French: Canton de Conflans-en-Jarnisy) is a former French canton located in the department of Meurthe-et-Moselle in the Lorraine region (now part of Grand Est).

This canton was organized around Conflans-en-Jarnisy in the arrondissement of Briey.

[1] It is now part of the canton of Pays de Briey.

The last general councillor from this canton was Olivier Tritz (PCF), elected in 2011.

[2] The canton of Conflans-en-Jarnisy grouped together 25 municipalities and had 19,232 inhabitants (2012 census without double counts).