The Bliesgau is a district of the Saarland in Germany. It is named for the River Blies, a tributary of the Saar, and lies near the border with France.
Blieskastel is the principal town of the district. Other towns in the area include Gersheim, Mandelbachtal and Wolfersheim. The region forms part of the larger Muschelkalk geological zone.
Historically the district is first recorded in the 10th century when it formed part of the lands of the Bishopric of Metz, along with neighbouring Sankt Ingbert. It was ruled by Counts of Bliesgau.