| London Overground | |
|---|---|
A London Overground class 378 train at Canonbury | |
| Overview | |
| Owner | Transport for London |
| Locale | London, Greater London |
| Transit type | Commuter rail |
| Number of lines | 6 |
| Number of stations | 113 |
| Daily ridership | 135 million |
| Operation | |
| Began operation | 2007 |
| Operator(s) | Arriva Rail London |
| Reporting marks | LO (National Rail) |
| Technical | |
| System length | 123.6 km (76.8 mi) |
| Track gauge | Standard |

The London Overground (LO) is a suburban rail system in London, with Arriva Rail London running train services as a concession for Transport for London (TFL). It uses a mixture of both TFL and Network Rail infrastructure.
Established in 2007 to take over Silverlink Metro routes, the London Overground is currently made up of 113 stations on the six lines that make up the network which it serves in a lot of Greater London.
All lines can be used with the Oyster card used across London. The London Overground has received praise for its transformation of long-neglected lines into clean and reliable services, with passenger usage increasing sharply such that the British Rail Class 378 trains had to be extended from 3 cars in 2007 to 5 cars in 2015. In the autumn 2011 National Passenger Survey, London Overground received an overall satisfaction rating of 92%, a 7% improvement on the previous survey.