Barcelona Underground
- Known as: Metro
- Lines: 11
- Stations: 165
- Length: 123,5 kms
- Automated trains: Yes (from 2009)
- Web: www.tmb.cat
- Passengers/day: 1,127 millions
- Operator: Transportes Metropolitanos de Barcelona y Ferrocarriles de la Generalidad de Cataluña (TMB y FGC)
- Opening: 1924