The Basel tramway 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 and 6 are in the more rural canton of Basel-Land, whilst line 8 terminates across the frontier in Germany.