Last updated
Origin of the Iller (Photo from an aircraft)
Country Germany
States Bavaria, Baden-Württemberg
Physical characteristics
 - location Northern Limestone Alps
 - location
 - coordinates
48°22′53″N9°58′23″E / 48.38139°N 9.97306°E / 48.38139; 9.97306 Coordinates: 48°22′53″N9°58′23″E / 48.38139°N 9.97306°E / 48.38139; 9.97306
Length145.9 km (90.7 mi) [1]
Basin size2,147 km2 (829 sq mi) [1]
 - average90 m3/s (3,200 cu ft/s)
Basin features
Progression DanubeBlack Sea
İller means provinces in Turkish, see Provinces of Turkey

The Loudspeaker.svg Iller   (ancient name Ilargus) is a river of Bavaria and Baden-Württemberg in Germany. It is a right tributary of the Danube, 146 kilometres (91 mi) long.

Bavaria State in Germany

Bavaria, officially the Free State of Bavaria, is a landlocked federal state of Germany, occupying its southeastern corner. With an area of 70,550.19 square kilometres, Bavaria is the largest German state by land area comprising roughly a fifth of the total land area of Germany. With 13 million inhabitants, it is Germany's second-most-populous state after North Rhine-Westphalia. Bavaria's main cities are Munich and Nuremberg.

Baden-Württemberg State in Germany

Baden-Württemberg is a state in southwest Germany, east of the Rhine, which forms the border with France. It is Germany’s third-largest state, with an area of 35,751 km2 (13,804 sq mi) and 11 million inhabitants. Baden-Württemberg is a parliamentary republic and partly sovereign, federated state which was formed in 1952 by a merger of the states of Württemberg-Baden, Baden and Württemberg-Hohenzollern. The largest city in Baden-Württemberg is the state capital of Stuttgart, followed by Karlsruhe and Mannheim. Other cities are Freiburg im Breisgau, Heidelberg, Heilbronn, Pforzheim, Reutlingen and Ulm.


It is formed at the confluence of the rivers Breitach, Stillach and Trettach near Oberstdorf in the Allgäu region of the Alps, close to the Austrian border. From there it runs northwards, passing the towns of Sonthofen, Immenstadt, and Kempten.

Breitach river in Austria (Vorarlberg) and Germany (Bavaria)

The Breitach is a 24 km long mountain river, the southwestern (left) source of the Iller in the Allgäu Alps, in the states of Vorarlberg (Austria) and Bavaria (Germany).

Stillach river in Germany

Stillach is a river of Bavaria, Germany. At its confluence with the Breitach and the Trettach in Oberstdorf, the Iller is formed.

Trettach river in Germany

Trettach is a river of Bavaria, Germany. At its confluence with the Breitach and the Stillach in Oberstdorf, the Iller is formed.

The Iller near Steinheim [de
] (district of Memmingen) Bij Steinheim, de Iller foto2 2014-07-28 13.39.jpg
The Iller near Steinheim  [ de ] (district of Memmingen)

Between Lautrach near Memmingen and Ulm it forms the border between the two German States Bavaria and Baden-Württemberg for about 50 kilometres (31 mi). The river flows into the Danube in the city centre of Ulm.

Lautrach Place in Bavaria, Germany

Lautrach is a municipality in the district of Unterallgäu in Bavaria, Germany.

Memmingen Place in Bavaria, Germany

Memmingen is a town in Swabia, Bavaria, Germany. It is the economic, educational and administrative centre of the Danube-Iller region. To the west the town is flanked by the Iller, the river that marks the Baden-Württemberg border. To the north, east and south the town is surrounded by the district of Unterallgäu.

Ulm Place in Baden-Württemberg, Germany

Ulm is a city in the federal German state of Baden-Württemberg, situated on the River Danube. The city, whose population is estimated at almost 120,000 (2015), forms an urban district of its own and is the administrative seat of the Alb-Donau district. Founded around 850, Ulm is rich in history and traditions as a former free imperial city. Today, it is an economic centre due to its varied industries, and it is the seat of the University of Ulm. Internationally, Ulm is primarily known for having the church with the tallest steeple in the world, the Gothic minster, and as the birthplace of Albert Einstein.

The Iller has a catchment area of 2,152 square kilometres (831 sq mi). It ranks as the seventh of Bavaria's rivers by water flow, with an average throughput of 75 cubic metres per second (2,600 cu ft/s) at Senden, a short distance upstream from the Danube. The power of the river is used for the production of hydroelectricity via eight power stations with a total net capacity of 51 MW (1998).

Senden Place in Bavaria, Germany

The town of Senden is the second-largest town of the district of Neu-Ulm in Bavaria and is located at the border to Baden-Württemberg. The town belongs to the Donau-Iller-Nahverkehrsverbund. Senden's neighbours are Neu-Ulm in the north, Weißenhorn in the east, Vöhringen in the south and Illerkirchberg in the west.

Hydroelectricity electricity generated by hydropower

Hydroelectricity is electricity produced from hydropower. In 2015, hydropower generated 16.6% of the world's total electricity and 70% of all renewable electricity, and was expected to increase about 3.1% each year for the next 25 years.

A bicycle route follows the Iller, which is also a popular location for rafting and trekking.

See also


International Standard Book Number Unique numeric book identifier

The International Standard Book Number (ISBN) is a numeric commercial book identifier which is intended to be unique. Publishers purchase ISBNs from an affiliate of the International ISBN Agency.

Related Research Articles

Swabia (Bavaria) Regierungsbezirk in Bavaria, Germany

Swabia is one of the seven administrative regions of Bavaria, Germany.

Württemberg, a hilly rather than a mountainous region, forms part of the South German tableland, also referred to as the Swiss plateau. The undulating fertile terraces of Upper and Lower Swabia typify this agricultural region. Estimates of land form proportions count a quarter of the entire area as plain, less than one-third as mountainous, and nearly one-half as hill-country.

Alb-Donau-Kreis is a Landkreis (district) in Baden-Württemberg, Germany. It is bounded by the districts of Biberach, Reutlingen, Göppingen and Heidenheim, the two Bavarian districts Günzburg and Neu-Ulm, and the city of Ulm.

Lech (river) river in Austria and Germany

The Lech is a river in Austria and Germany. It is a right tributary of the Danube 255 kilometres (158 mi) in length with a drainage basin of 3,919 square kilometres (1,513 sq mi). Its source is located in the Austrian state of Vorarlberg, where the river rises from lake Formarinsee in the Alps at an altitude of 1,870 metres (6,120 ft). It flows in a north-north-easterly direction and crosses the German border, forming the Lechfall, a 12-metre-high (39 ft) waterfall; afterwards the river enters a narrow gorge. Leaving the Alps, it enters the plains of the Allgäu at Füssen at an elevation of 790 metres (2,580 ft) in the German state of Bavaria, where it used to be the location of the boundary with Swabia. The river runs through the city of Füssen and through the Forggensee, a man-made lake which is drained in winter. Here, it forms rapids and a waterfall.

Unterallgäu District in Bavaria, Germany

Unterallgäu is a Landkreis (district) in Swabia, Bavaria, Germany. Neighboring districts are Neu-Ulm, Günzburg, Augsburg, Ostallgäu, Oberallgäu, and the districts Ravensburg und Biberach in Baden-Württemberg. The district-free city Memmingen in the west of the district is nearly surrounded by the district. The capital of the district is Mindelheim.

Blaubeuren Place in Baden-Württemberg, Germany

Blaubeuren is a town in the district of Alb-Donau near Ulm in Baden-Württemberg, Germany.

Southern Germany as a region has no exact boundary but is generally taken to include the areas in which Upper German dialects are spoken. That corresponds roughly to the historical stem duchies of Bavaria and Swabia or, in a modern context, to Bavaria and Baden-Württemberg within the Federal Republic of Germany, to the exclusion of the areas of the modern states of Austria and Switzerland. The Saarland and the southern parts of Hesse and Rhineland-Palatinate are sometimes included as well and correspond to the historical Franconia.

Upper Swabia

Upper Swabia is a region in Germany in the federal states of Baden-Württemberg and Bavaria. The name refers to the area between the Swabian Jura, Lake Constance and the Lech. Its counterpart is Lower Swabia (Niederschwaben), the region around Heilbronn.

Ulm Hauptbahnhof railway station in Ulm, Germany

Ulm Hauptbahnhof is the main station in the city of Ulm, which lies on the Danube, on the border of the German states of Baden-Württemberg and Bavaria in the Danube-Iller region.

Ludwig South-North Railway first railway line to be constructed by Royal Bavarian State Railways

The Ludwig South-North railway (Ludwig-Süd-Nord-Bahn), built between 1843 and 1854, was the first railway line to be constructed by Royal Bavarian State Railways. It was named after the king, Ludwig I, whose infrastructure priorities had earlier been focused less on railway development than on his Main-Danube canal project.

Danube River in Central Europe

The Danube is Europe's second longest river, after the Volga. It is located in Central and Eastern Europe.

History of railways in Württemberg aspect of history

The history of railways in Württemberg describes the beginnings and expansion of rail transport in Württemberg from the first studies in 1834 to today.

Alb (Upper Rhine) tributary to Rhine river

The Alb is a river in the Northern Black Forest in Germany. It is a tributary of the Rhine, and flows through the cities of Karlsruhe, Ettlingen and Bad Herrenalb.

Argen river in Baden-Württemberg, Germany

The Argen is a river in Baden-Württemberg, Germany. It flows into Lake Constance between Kressbronn am Bodensee and Langenargen as the third largest tributary to the lake. It is 23.4 kilometres (14.5 mi) long; if one includes the Obere Argen and its source river Seelesgraben, the combined length is 73.2 kilometres (45.5 mi).

Obere Argen river in Germany

The Obere Argen is a river in southwestern Bavaria and southeastern Baden-Württemberg in Germany.

Schwarzenbach is a river of Baden-Württemberg and of Bavaria, Germany.

Untere Argen river in Germany

Untere Argen is a river of Baden-Württemberg and Bavaria, Germany. Its source is near the village Börlas in southwestern Bavaria. It passes along Isny im Allgäu and Wangen im Allgäu. At its confluence with the Obere Argen near Neukirch, the Argen is formed.

Adelegg mountain range

The Adelegg is a forested, mountain range, up to 1,129 m above sea level (NN) and 112 km² in area, which is part of the northern foothills of the Alps, within the Westallgäu in the south German districts of Ravensburg and Oberallgäu.

Kißlegg–Hergatz railway railway line

The Kißlegg–Hergatz railway is an 18.589 km long standard gauge main line in the Allgäu in the German states of Baden-Württemberg and Bavaria. It runs from Kißlegg via Wangen to Hergatz and connects the Württemberg Allgäu Railway with the Bavarian Allgäu Railway. The line is not electrified and is all single-track. It is operated by Deutsche Bahn and is shown in its timetable as part of route number 753 from Aulendorf to Hergatz, which is alternatively called the Württemberg-Allgäu-Bahn and part of route number 971 from Augsburg to Lindau. The Kißlegg–Wangen section is also integrated in the network of the Bodensee-Oberschwaben Verkehrsverbund.

Leutkirch–Memmingen railway railway line

The Leutkirch–Memmingen railway is a 31.540 km long, single-track, non-electrified railway in the German state of Baden-Württemberg, which connects Leutkirch and Memmingen.


  1. 1 2 Complete table of the Bavarian Waterbody Register by the Bavarian State Office for the Environment (xls, 10.3 MB)