DSB, an abbreviation of Danske Statsbaner (Danish State Railways), is the largest Danish train operating company, and the largest in Scandinavia. While DSB is responsible for passenger train operation on most of the Danish railways, goods transport and railway maintenance are outside its scope. DSB runs a commuter rail system, called S-train, in the area around the Danish capital, Copenhagen, that connects the different areas and suburbs in the greater metropolitan area.
DSB was founded in 1885 when the government-owned companies De jysk-fynske Statsbaner and De sjællandske Statsbaner merged.
On September 1, 1867, the Danish state took over Det danske Jernbane-Driftsselskab (The Danish Railway Operation Company), the major railway company in Jutland and Funen, and consequently, De jysk-fynske Statsbaner (The State Railways of Jutland and Funen) were formed.
The Danish state took over Det sjællandske Jernbaneselskab (The Railway Company of Zealand) on January 1, 1880, forming De sjællandske Statsbaner (The State Railways of Zealand). With the majority of railways on both sides of the Great Belt thus owned by the Danish state, it was not until October 1, 1885 that the companies of Jutland/Funen and Zealand merged into one national railway company, De danske Statsbaner (The Danish State Railways), the merger being finalised on April 1, 1893.