Saarlouis is located in this historical German region of Lothringen. Today, Saarlouis is located in the German State of Saarland. Names Saarlouis, Kr. Saarlouis, Saarland Surnames Grefeldinger Scherer (Sewald) Ludwigskirche in Saarlouis (2006). Source: Wikipedia Commons. 49.316667, 6.75 Volga Colonies Chasselois Louis Liebental Sewald Hölzel Marienberg