The Basel tramway network (German: Basler Strassenbahn-Netz) is a network of tramways forming part of the public transport system in Basel, Switzerland, and the Swiss part of its agglomeration. It consists of 13 lines. Due to its longevity (the network is now more than a century old), it is part of Basel's heritage and, alongside the Basel Minster, is one of the symbols of the city.
The trams on the network are operated by two transport providers: Basler Verkehrs-Betriebe (Basel Transport Service) (BVB) and Baselland Transport (BLT). Both operators are part of the integrated fare network Tarifverbund Nordwestschweiz (TNW), which in itself is part of the three countries-integrated fare network triregio.BVB is owned by, and operates in, Basel-Stadt, the small canton comprising the city of Basel and two smaller municipalities, both situated right of the Rhine. Its green trams operate mostly in the city, although the termini of its lines 3, 6, and 14 are in the more rural canton of Basel-Land, line 8 terminates across the frontier in Germany, and line 3 in France.
BLT is owned by Basel-Land, and its yellow and red trams operate in the outer suburbs to the south of Basel, and at one point pass through the territory of France. However, the three lines it operates, lines 10, 11 and 17, all also run over BVB track in central Basel. In addition line 14, while owned by BLT, is operated by BVB well into Basel-Land.