Baselland Transport AG (BLT) is a Swiss public transport operator in the cantons of Basel-Land, Basel-Stadt, Solothurn and in France. The BLT was founded in 1974, and is owned by the Canton of Basel-Land, located to the south of the city. It transports some 48 million passengers per year, using a fleet of 64 buses and 100 trams over a network of 165 kilometres (103 mi) of bus routes and 65 kilometres (40 mi) of tram routes.

The BLT jointly operates the Basel tram network with Basler Verkehrs-Betriebe (BVB), owned by the canton of Basel-Stadt. Whilst the BVB owns and operates the inner-city network, the BLT owns the infrastructure for five longer suburban routes and operates four of these itself, leaving the fifth to the BVB to operate. All the BLT routes operate over BVB infrastructure in the inner-city. Both are part of the integrated fare network Tarifverbund Nordwestschweiz (TNW), which in itself is part of the three countries-integrated fare network triregio. It also owns and operates the 750 mm (2 ft 5+1⁄2 in) Waldenburg railway.

The BLT's suburban routes include the 25.6 kilometres (15.9 mi) long international route 10, which connects Basel with Rodersdorf in the canton of Solothurn, passing through the French commune of Leymen en route.