Unterelsaß (Lower Alsace) was the name for a district ("Bezirk") in the northern part of Elsaß-Lothringen (Alsace-Lorraine) when it was part of the German Empire

German Empire

The German Empire refers to Germany during the "Second Reich" period from the unification of Germany and proclamation of Wilhelm I as German Emperor on 18 January 1871, to 1918, when it became a federal republic after defeat in World War I and the abdication of the Emperor, Wilhelm II.The German...

 from 1871 to 1918.

The capital of the district was Straßburg

Strasbourg

Strasbourg is the capital and principal city of the Alsace region in eastern France and is the official seat of the European Parliament. Located close to the border with Germany, it is the capital of the Bas-Rhin département. The city and the region of Alsace are historically German-speaking,...

. It comprised the subdistricts ("Kreise") of

1. Erstein
   Erstein
   Erstein is a commune in the Bas-Rhin department in the Alsace region in France.-History:Erstein was known in Alsace in the Middle Age for its Benedictine Abbey...
   
   
2. Hagenau
   Haguenau
   -Economy:The town has a well balanced economy. Centuries of troubled history in the buffer lands between France and Germany have bequeathed to Haguenau a rich historical and cultural heritage which supports a lively tourist trade. There is also a thriving light manufacturing sector centred on the...
   
    (Haguenau)
3. Molsheim
   Molsheim
   Molsheim is a commune in the Bas-Rhin department in Alsace in north-eastern France. The total population in 2006 was 9,382. Molsheim had been a very fast growing city between the French censuses of 1968 and 1999, passing from 5,739 to 9,331 inhabitants, but this increase came to a noticeable halt...
   
   
4. Schlettstadt
   Sélestat
   Sélestat is a commune in the Bas-Rhin department in Alsace in north-eastern France.In 2006, Sélestat had a total population of 19,459. The Communauté de communes de Sélestat et environs had a total population of 35,397.-Geography:...
   
    (Sélestat)
5. Straßburg, Land (county of Straßburg) (Strasbourg)
6. Weißenburg
   Wissembourg
   Wissembourg is a commune in the Bas-Rhin department in Alsace in northeastern France.It is situated on the little River Lauter close to the border between France and Germany approximately north of Strasbourg and west of Karlsruhe. Wissembourg is a sub-prefecture of the department...
   
    (Wissembourg)
7. Zabern
   Saverne
   Saverne is a commune in the Bas-Rhin department in Alsace in north-eastern France. It is situated on the Rhine-Marne canal at the foot of a pass over the Vosges Mountains, and 45 km N.W...
   
    (Saverne)
8. Illkirch-Graffenstaden
   Illkirch-Graffenstaden
   -Geography:The larger adjacent communes, like Illkirch-Graffenstaden, are effectively outer suburbs of the Strasbourg conurbation. These include Strasbourg-Meinau, Ostwald and Geispolsheim...
   
   

The district of Unterelsaß corresponds exactly to the current département of Bas-Rhin

Bas-Rhin

Bas-Rhin is a department of France. The name means "Lower Rhine". It is the more populous and densely populated of the two departments of the Alsace region, with 1,079,013 inhabitants in 2006.- History :...

.

The flag is a white bar in a red field decorated on each side with a white lace motif. The union of this flag with that of Oberelsaß forms the flag of modern Alsace.