Forbach (French pronunciation: ​[fɔʁbak], Lorraine Franconian: Fuerboch) is a commune in the department of Moselle in the northeastern French Region of Alsace-Champagne-Ardenne-Lorraine.

It is located on the German border approximately 15 minutes from the center of Saarbrücken, Germany, with which it constitutes a cross-border conurbation, and is part of the Saar-Moselle Eurodistrict. According to the 2011 national census, Forbach had a population of 21,954 inhabitants, which, including its greater urban area, makes it the largest town in the eastern Moselle area.