The Alsace bossue (Alemannic and Frankish: S'Gromme/S'Krumme Elsass, German: das krumme Elsass/ Krummes Elsass), is a territory of Bas-Rhin in Alsace, which includes the three former cantons of Sarre-Union, Drulingen and La Petite-Pierre (today all part of the canton of Ingwiller).
Just like nearby parts of Lorraine, the Alsace bossue is linguistically predominantly located into the Rhine Franconian area.