There are two railway South London Lines, both operated by Southern — the "inner" and "outer" lines, both running from London Victoria to London Bridge.

The "inner" line has the following stations:

• London Victoria
• Battersea Park
• Wandsworth Road
• Clapham High Street
• Denmark Hill
• Peckham Rye
• Queen's Road Peckham
• South Bermondsey
• London Bridge

The entirety of the route, apart from the London termini, is in Zone 2.

The "outer" line describes a greater area, following the Brighton mainline for a while. It has the following stations:

• London Victoria
• Battersea Park
• Clapham Junction
• Wandsworth Common
• Balham
• Streatham Hill
• West Norwood
• Gipsy Hill
• Crystal Palace
• Sydenham
• Forest Hill
• Honor Oak Park
• Brockley
• New Cross Gate
• London Bridge

This line covers Zones 1 to 4.

Each of the two lines will form part of the proposed East London Line southern extensions - the inner line from Surrey Quays tube station to Clapham High St. (and on to Clapham Junction) and the outer line from New Cross Gate to Crystal Palace.