The canton of Montiers-sur-Saulx () is a former French canton located in the department of Meuse in the Lorraine region (now part of Grand Est). This canton was organized around Montiers-sur-Saulx in the arrondissement of Bar-le-Duc. It is now part of the canton of Ligny-en-Barrois.
The last general councillor from this canton was Daniel Ruhland (DVD), elected in 2008.
The canton of Montiers-sur-Saulx grouped together 14 municipalities and had 2,754 inhabitants (2012 census without double counts).