The Basel tramway network (German: Basler Strassenbahn-Netz) is a network of tramways forming part of the public transport system in Basel, Switzerland, and its agglomeration - it also reaches into adjacent suburbs in Germany and France.

Its green trams operate mostly in the city, although termini of its lines 3, 6, 8 and 14 are across the cantonal or country border.

It owns the tram infrastructure in Basel-Land und runs the lines 10, 11 and 17 who are passing through Basel on BVB-tracks.

In 1900, the Basel tramway network acquired an international dimension, when a new cross-border line was opened to Sankt-Ludwig (now Saint-Louis, Haut-Rhin), in the then German Empire.

But that Birsigthalbahn (Birsig Valley Railway) would be joined to the general tram network of Basel as late as in 1984.

During the two World Wars, services were suspended on the parts of the line extending beyond Switzerland's borders.

Construction started in 2015 to extend Line 3 from its then-terminus at Bourgfelden Grenze to Saint-Louis station in France.

[9] Late-night services on the cross-border line were suspended in 2019 due to a series of attacks in which laser pointers were used to obstruct the vision of tram operators.