The State Library of Württemberg is a large library in Stuttgart, Germany, which traces its history back to the ducal public library of Württemberg founded in 1765. It holds c. 3.8 million volumes and is thus the fourth-largest library in the state of Baden-Württemberg (after the university libraries of Freiburg, Heidelberg and Tübingen). The WLB owns an important collection of medieval manuscripts as well as one of the largest bible collections in the world.
The WLB is one of two state libraries of Baden-Württemberg, the other being the Badische Landesbibliothek (BLB) at Karlsruhe. One of the library's main purposes is to collect and archive written literature from and about the Regierungsbezirk (state subdivision) Tübingen and Regierungsbezirk Stuttgart, i.e. roughly the former land of Württemberg. The library is entitled to a legal deposit of every work published in Baden-Württemberg (before 1964: in Württemberg).
The WLB has also been part of the Stuttgart University library system since 1967. As an academic library, it is responsible for the humanities sections of the University of Stuttgart as well as for the Stuttgart College of Music and the Stuttgart Academy of Arts.
While the library offers many catalogues online (including a Baden-Württemberg bibliography), it does not yet make its collections available in digitized form at all.