2019–20 Regionalliga Südwest

The 2019–20 Regionalliga is the elventh season of the Regionalliga, the seventh under the new format, as the fourth tier of the German football league system.

18 teams from Baden-Württemberg, Hesse, Rhineland-Palatinate and Saarland compete in the eighth season of the Regionalliga Südwest. VfR Aalen was relegated from the 2018–19 3. Liga. Rot-Weiß Koblenz was promoted from the 2018–19 Oberliga Rheinland-Pfalz/Saar, Bahlinger SC was promoted from the 2018–19 Oberliga Baden-Württemberg and FC Gießen was promoted from the 2018–19 Hessenliga.