Dornbirn, town, western Austria, on the Dornbirner Stream, in the Rhine River valley at the foot of the Bregenzer Forest, just south of Bregenz. First mentioned as Torrinpuirron in 895, it belonged to the counts of Montfort from the late 12th century until it passed to Austria in 1380. It received town status in 1901. Notable landmarks are the Neoclassical parish church (1493) with a detached belfry and the Rotes Haus (“Red House”; 1639). The town has a regional nature museum. Dornbirn is the principal centre of the Austrian textile industry. Other economic activities include brewing, the manufacture of electrical machinery and generators, and the working of iron, wood, and plastic. It is the site of an annual international trade fair. Dornbirn is also an important regional centre for trade and services. Pop. (2006) 43,864.