Bierbach an der Blies is a part (Stadtteil) of Blieskastel, Saarland, Germany. It is part of the Bliesgau and was founded on the right river bank of the Blies. As a consequence of the , Bierbach ceased to be an independent municipality and became a part of the town of Blieskastel and incorporated within the district Saarpfalz-Kreis of which Homburg is the administrative seat.