Bas-Rhin
A former French department in Alsace, now incorporated into the European Collectivity of Alsace.
Last updated August 24, 2026
AI crawler reads
No AI crawler has read this profile since Oct 28, 2026.
Overview
Bas-Rhin, meaning “Lower Rhine,” was a French department in the historic region of Alsace and later in the Grand Est region. Its name referred to its position downstream and at a lower elevation than Haut-Rhin, the other French department traditionally associated with Alsace. The Rhine formed its eastern boundary, while the Vosges foothills shaped much of its western landscape. Strasbourg, the department’s prefecture and largest city, was also an important European political and cultural centre, hosting the European Parliament and the Council of Europe. The department was created during the French Revolution on 4 March 1790 as one of France’s original 83 departments. Its borders changed repeatedly as a result of revolutionary annexations, the Napoleonic period, the Franco-Prussian War, and the treaties that followed the First and Second World Wars. In 1871, following the Treaty of Frankfurt, Bas-Rhin was transferred to the German Empire and became part of the Reichsland Elsaß-Lothringen under the German designation Bezirk Unterelsass. It returned to France under the Treaty of Versailles in 1919. The territory also experienced occupation and administrative changes during the Second World War; the Natzweiler-Struthof concentration camp operated in the department between 1941 and 1944. Bas-Rhin was one of France’s more populous and densely settled departments. Its population was reported at 1,163,810 in 2023, with Strasbourg serving as the principal urban and administrative centre. The department contained five arrondissements—Haguenau-Wissembourg, Molsheim, Saverne, Sélestat-Erstein, and Strasbourg—and 23 cantons. Its economy combined manufacturing, food processing, construction, commerce, agriculture, services, cross-border employment, and tourism. The Rhine corridor, Strasbourg Airport, proximity to Germany, and the area’s position within the Upper Rhine region supported substantial economic and transport links. The area’s identity reflects French, German, and Alsatian influences. It is known for historic castles, Strasbourg Cathedral, Mont Sainte-Odile, museums, traditional costumes, stork symbolism, village festivals, and Alsatian food and wine culture. Alsace and the neighbouring Moselle department also retain several local-law arrangements inherited from the period of German administration, including distinctive provisions affecting religious institutions, social rights, local government, and other matters. Bas-Rhin ceased to exist as a separate departmental council on 1 January 2021, when the former departmental councils of Bas-Rhin and Haut-Rhin were merged into the European Collectivity of Alsace. The territory remains a recognizable administrative and cultural area, and the state prefecture website continues to provide public information for the Bas-Rhin arrondissement and wider northern Alsace area.
History
Bas-Rhin was established on 4 March 1790 during the French Revolution, when the former provinces of France were reorganized into departments. The new department covered the northern part of Alsace, with Strasbourg as its administrative capital. Its early boundaries were not stable. Revolutionary France incorporated several neighbouring territories, including the County of Sarrewerden, the County of Drulingen, the lordship of Diemeringen, parts of the Palatinate, and other areas. In 1795, the Schirmeck area was transferred to the Vosges department because of its linguistic and administrative circumstances. During the Napoleonic era, France temporarily controlled territory east of the Rhine, including Kehl, which was attached to Bas-Rhin in 1808. After Napoleon’s defeat, the treaties of 1814 and 1815 redrew the frontier. France gained some territory north of the Lauter after the First Treaty of Paris but subsequently lost the Rhine territories and the lands north of the Lauter. Bas-Rhin was occupied by allied forces from 1815 until 1818. The Franco-Prussian War produced another major constitutional change. Under the Treaty of Frankfurt in 1871, Bas-Rhin was annexed by the German Empire and incorporated into the Reichsland Alsace-Lorraine as Bezirk Unterelsass. German administration influenced the region’s institutions, infrastructure, legal arrangements, and cultural life. After Germany’s defeat in the First World War, the Treaty of Versailles returned Bas-Rhin to France in 1919. The department retained the former Vosges cantons of Schirmeck and Saales that Germany had taken in 1871. The Second World War brought German occupation and severe persecution. The Natzweiler-Struthof concentration camp operated in the Vosges area of the department from 1941 to 1944. Kehl was temporarily attached to Bas-Rhin after the war, but it was returned to Germany in 1953. In 1982, Bas-Rhin became part of the newly created Alsace administrative region. A 2013 referendum considered creating a single Alsatian territorial authority by combining the region with Bas-Rhin and Haut-Rhin, but the proposal did not take effect at that time. Later institutional reform produced the European Collectivity of Alsace. On 1 January 2021, the departmental councils of Bas-Rhin and Haut-Rhin merged, and Bas-Rhin ceased to be an independent departmental authority. The former territory remained part of the Grand Est region and continued to function through state administration, local communes, intercommunal bodies, and the new collectivity. Historically, the department’s economic and cultural development was closely tied to the Rhine, the Upper Rhine cross-border region, Strasbourg, and the foothills of the Vosges. Its economy included industry, small and medium-sized enterprises, agriculture, food production, construction, commerce, services, education, tourism, and cross-border employment. Strasbourg also became a major centre of European institutions and higher education. The department’s heritage includes medieval castles, religious monuments, museums, Alsatian villages, traditional festivals, and distinctive local-law practices that reflect its alternating French and German political history.
- 2021
Creation of the European Collectivity of Alsace
[1]Bas-Rhin and Haut-Rhin departmental councils were merged into the European Collectivity of Alsace, ending Bas-Rhin’s separate departmental-council status.
- 2013
Alsace institutional merger referendum
[1]Voters considered, but did not approve, a plan to combine the Alsace region and its two departments into one territorial authority.
- 1982
Joined the Alsace region
[1]Bas-Rhin became part of the newly established Alsace administrative region.
- 1941
Natzweiler-Struthof camp begins operation
[1]The Natzweiler-Struthof concentration camp operated in the department during the German occupation.
- 1919
Return to France
[1]The Treaty of Versailles returned Bas-Rhin to French sovereignty after the First World War.
- 1871
Annexation by the German Empire
[1]The Treaty of Frankfurt transferred Bas-Rhin to Germany, where it became part of the Reichsland Alsace-Lorraine.
- 1808
Kehl and other Rhine territories attached
[1]French control east of the Rhine led to the temporary incorporation of Kehl and surrounding territories.
- 1793
Revolutionary territorial expansions
[1]Several neighbouring territories, including Sarrewerden and Drulingen, were incorporated into the department during the revolutionary period.
- 1790
Department created during the French Revolution
[1]Bas-Rhin was established on 4 March 1790 as one of France’s original departments, with Strasbourg as its capital.
Products and positioning
Former French administrative department and historical Alsatian territory
Brand decisions
2021
Merge the Bas-Rhin and Haut-Rhin departmentsStrategyBackground
Alsace’s two departmental authorities had long shared historical, cultural, and cross-border characteristics, while earlier proposals for a single Alsatian institution had been debated publicly.
Action taken
The departmental councils were replaced by the European Collectivity of Alsace on 1 January 2021.
Aftermath
Bas-Rhin no longer exists as a separate department-level local authority, although its former territory remains an identifiable arrondissement and historical area within France’s Grand Est region.
Recent events
- 2023
Bas-Rhin records population of more than 1.16 million[1]
Other
Official demographic figures cited for 2023 placed Bas-Rhin’s population at 1,163,810, making it one of France’s more populous departments before its institutional merger.
- 2021
Bas-Rhin and Haut-Rhin councils merge into the European Collectivity of Alsace[1]
Other
The two former departmental councils were replaced by a unified European Collectivity of Alsace, ending Bas-Rhin’s status as a separate departmental authority.
Sources3 sources
Cite this profile: Cite the canonical profile. /brand-wiki/bas-rhin · Editorial policy · How profiles are compiled