SWEG Südwestdeutsche Landesverkehrs-AG

The Südwestdeutsche Landesverkehrs-GmbH (SWEG), in English language Southwest German Transport Company, from its former name, Südwestdeutsche Eisenbahn-Gesellschaft (SEG), is a transport company in southwest Germany that operates railway lines and bus services. It is 100% owned by the federal state of Baden-Württemberg.

On 24 July 2017, a merger between SWEG and the Hohenzollerische Landesbahn (HzL) was approved by the Sigmaringen and Zollernalbkreis district authorities which each hold 14% stakes in HzL. The merger has already been approved by the state of Baden-Württemberg, which besides its ownership of SWEG also owns 72% of HzL. The merger is intended to take effect from the beginning of 2018.

Railway services
SWEG directly owns and operates the following railway lines:


 * Achern – Ottenhöfen (the Achertalbahn)
 * Bad Krozingen – Münstertal (the Münstertalbahn)
 * Biberach (Baden) – Oberharmersbach-Riersbach (the Harmersbachtalbahn)
 * Bühl – Schwarzach – Stollhofen (goods only)
 * Gottenheim – Riegel am Kaiserstuhl – Breisach (the Kaiserstuhlbahn) SWEG Bombardier Talent 3 train at Breisach railway station.jpg'' train at Breisach railway station (March, 2023)]]
 * Freiburg (Breisgau) Hbf – Denzlingen – Elzach (the Elztalbahn)

SWEG's wholly owned Ortenau S-Bahn subsidiary also operates services over lines owned by DB Netz AG in the vicinity of Offenburg. SWEG also has a 50% share-holding in the Breisgau S-Bahn, which operates similar services in the vicinity of Freiburg im Breisgau.