It comprised (broadly speaking) the present:
- North Rhine-Westphalia, Rhineland-Palatinate, Saarland (Germany)
- Lorraine, Alsace (France)
Lotharingia did not survive its king and became the duchy of Lorraine; it was subdivided and became the object of territorial disputes between France and Germany. The name survives today in the name derived from it: Lorraine (in German: Lothringen).