Langenlois is a town in the district of Krems-Land in the Austrian state of Lower Austria. It lies on the Kamp river in the Kamptal, a valley region of Lower Austria.
The town is known for its wine production, which is its most notable characteristic. It is also home to the Loisium, a centre dedicated to celebrating and advertising the local wine. The Loisium was built by the American deconstructionist architect Steven Holl.