Overground could refer to:
Overground - German Boy Band
Overground - A single released by Siouxsie & the Banshees
Overground Network - Brand Names of suburban railways in south London
London Overground - a London suburban railway run by Transport for London from 2007
In everyday speech in London, UK, the word "overground" is often used informally to refer to National Rail services in London, to distinguish them from Underground services. As of 2007, the official brand name Overground is being used to specifically refer to the new London Overground service, but this does not include National Rail services.