Hartzviller (German: Harzweiler) is a commune in the Moselle department in Grand Est in north-eastern France.

It has less than 1,000 inhabitants since the beginning of the 21st century but forms a small agglomeration with the communes of Troisfontaines and Walscheid, frequently referred to as the "Bièvre Valley", with 4,000 inhabitants.

This commune is located in the historic region of Lorraine.

The Hartzviller train station is nowadays closed.

This Arrondissement of Sarrebourg-Château-Salins geographical article is a stub.