Ferrocarril General Manuel Belgrano
Ferrocarril General Manuel Belgrano (FCGMB), named after the Argentine politician and military leader Manuel Belgrano, was one of the six state-owned Argentine railway companies formed after President Juan Perón's nationalisation of the railway network in 1948. The six companies were managed by Ferrocarriles Argentinos which was later broken up during the process of railway privatisation beginning in 1991 during Carlos Menem's presidency.
- Córdoba Central Railway, which had been bought by the Argentine government in 1939.
- Transandine Railway
- Buenos Aires Midland Railway
- Ferrocarril Compañía General en la Provincia de Buenos Aires
- Ferrocarril Provincial de Santa Fe
- Ferrocarril Central Norte
- Ferrocarril Provincial de Buenos Aires
The main lines departed from Estación Retiro in Buenos Aires to the north through the provinces of Buenos Aires, Santa Fe, Córdoba, Santiago del Estero, Tucumán, Chaco, Formosa, Salta, Jujuy, San Luis, Mendoza, San Juan, La Rioja and Catamarca.
Suburban branches 
Línea Belgrano Norte
In the metropolitan sector of the City of Buenos Aires there is a diesel commuter branch that operates from the Retiro railway terminus in the city-centre to the town of Villa Rosa the northern suburbs of Buenos Aires.
Línea Belgrano Sur
On the southern sector of the City of Buenos Aires two diesel commuter lines operate to the southern suburbs of Buenos Aires.
- H.R.Stones, British Railways in Argentina 1860-1948, P.E.Waters & Associates, Bromley, Kent, England, 1993.