Sundbyberg Municipality is a municipality in Stockholm County in east central Sweden, just north of the capital Stockholm. Sundbyberg is wholly within the Stockholm urban area and has a 100% urban population.

Stockholm commuter rail is the commuter rail system in Stockholm County, Sweden. The system is an important part of the public transport in Stockholm, and is controlled by Storstockholms Lokaltrafik. The tracks are state-owned and administered by the Swedish Transport Administration, while the operation of the Stockholm commuter rail services itself has been contracted to MTR Nordic since December 2016.