Lubiąż [ˈlubjɔ̃ʂ] (German: Leubus) is a village on the east bank of the Odra (Oder) River, in the administrative district of Gmina Wołów, within Wołów County, Lower Silesian Voivodeship, in south-western Poland. It lies approximately 14 kilometres (9 mi) south-west of Wołów, and 42 kilometres (26 mi) west of the regional capital Wrocław. The village has a population of 2,300.
From the 11th century Lubiąż belonged to various Silesian principalities ruled by dukes of the Silesian branch of the Piast dynasty. In 1201 Bolesław I the Tall was the first of the Silesian Piast dynasty interred in Lubiąż. The region passed to the Crown of Bohemia and became part of the Holy Roman Empire, later dominated by Austria. On 30 June 1432 the Hussites invaded the village, devastating and burning the monastery. The area was heavily affected by the Thirty Years' War. In 1632 it was plundered by the Saxons, and in 1639 was occupied by Swedish forces. In 1740 Silesia (and so Lubiąż) was taken from Austria by the Kingdom of Prussia. From 1871 until 1945 Lubiąż belonged to unified Germany. It then passed to Poland along with the bulk of Silesia (see Territorial changes of Poland after World War II).
The village is mainly known for its large Abbatia Lubensis abbey. The Abbey was built by the Benedictines in 1150, and occupied by Cistercians in 1163 until 1810.
Built over centuries, the abbey – the largest Cistercian abbey in the world – is rated in the highest class ("0") of landmarks of world's cultural heritage.
Lubiąż is also known in Poland for its regional psychiatric hospital.