Boulay-Moselle (; , Moselle Franconian: Bolchin) is a commune in the Moselle department in Grand Est in northeastern France. The former commune of Halling-lès-Boulay (German: Hallingen) was incorporated in the commune in January 1973. Until 2015, Boulay-Moselle was a subprefecture of the Moselle department.
The population data in the table below refer to the commune of Boulay-Moselle proper, in its geography at the given years.