Kottbusser Tor is a Berlin U-Bahn station located on the and . Many Berliners use the affectionate term Kotti.
It is located in central Kreuzberg. The area has a bad reputation for the relatively high, mainly drug-related crime rate, instances of which have recently become quite rare in most other parts of the district.The original Kottbusser Tor was a southern city gate of Berlin; the road through the gate led via the Neukölln suburb to the town of Cottbus.
The station on the first Berlin U-Bahn line from Potsdamer Platz to Stralauer Tor was opened on 18 February 1902 on a viaduct above Skalitzer Straße. When in 1926 the U8 was built, a new two-level station was constructed 100 m westwards to allow both lines to meet in one location, and the original station was demolished.