The Oberhausen-Osterfeld Süd–Hamm railway, also called the Hamm-Osterfeld line, is a 76-kilometre long double-track electrified main line railway at the northern edge of the Ruhr in the German state of North Rhine-Westphalia.

Hamm (Westf) Hauptbahnhof (often abbreviated Hamm (Westf) or simply Hamm (W)) is a railway station situated in the city of Hamm in the German state of North Rhine-Westphalia. It is notable for its station building inspired by art deco and Gründerzeit building styles. The station is one of the important InterCityExpress rail hubs in the eastern Ruhr area and is among the high-profile buildings of Hamm. Until the decline of rail freight after the Second World War, it featured one of Europe's largest marshalling yards.