Tübingen is a traditional university city in central Baden-Württemberg, Germany. It is situated 30 km south of the state capital, Stuttgart, and developed on both sides of the Neckar and Ammer rivers. As of 2014 about one in three of the 90,000 people living in Tübingen is a student. As of the 2018/2019 winter semester, 27,665 students attend the Eberhard Karls University of Tübingen. The city has the lowest median age in Germany, in part due to its status as a university city; as of December 31, 2015, the average age of a citizen of Tübingen is 39.1 years.
Immediately north of the city lies the Schönbuch, a densely wooded nature park. The Swabian Alb mountains rise about 13 km to the southeast of Tübingen.
The Ammer and Steinlach rivers are tributaries of the Neckar river, which flows in an easterly direction through the city, just south of the medieval old town. Large parts of the city are hilly, with the Schlossberg and the Österberg in the city centre and the Schnarrenberg and Herrlesberg, among others, rising immediately adjacent to the inner city.