The Sieg is a
river
A river is a natural flowing watercourse, usually freshwater
Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. Although the ...
in
North Rhine-Westphalia
North Rhine-Westphalia (german: Nordrhein-Westfalen, ; li, Noordrien-Wesfale ; nds, Noordrhien-Westfalen; ksh, Noodrhing-Wäßßfaale), commonly shortened to NRW (), is a state (''Land'') in Western Germany. With more than 18 million inhab ...
and
Rhineland-Palatinate
Rhineland-Palatinate ( , ; german: link=no, Rheinland-Pfalz ; lb, Rheinland-Pfalz ; pfl, Rhoilond-Palz) is a western state of Germany. It covers and has about 4.05 million residents. It is the ninth largest and sixth most populous of the ...
,
Germany
Germany, officially the Federal Republic of Germany (FRG),, is a country in Central Europe. It is the most populous member state of the European Union. Germany lies between the Baltic and North Sea to the north and the Alps to the sou ...
. It is a
right tributary
A tributary, or affluent, is a stream or river that flows into a larger stream or main stem (or parent) river or a lake. A tributary does not flow directly into a sea or ocean. Tributaries and the main stem river drain the surrounding drainag ...
of the
Rhine
The Rhine ; french: Rhin ; nl, Rijn ; wa, Rén ; li, Rien; rm, label=Sursilvan, Rein, rm, label=Sutsilvan and Surmiran, Ragn, rm, label=Rumantsch Grischun, Vallader and Puter, Rain; it, Reno ; gsw, Rhi(n), including in Alsatian dialect, Al ...
.
The river is named after the
Sicambri. It is in length.
The source is located in the
Rothaargebirge mountains. From here the river runs southwestwards to the city of
Siegen
Siegen () is a city in Germany, in the south Westphalian part of North Rhine-Westphalia.
It is located in the district of Siegen-Wittgenstein in the Arnsberg region. The university town (nearly 20,000 students in the 2018–2019 winter semeste ...
and the hills of
Siegerland, both named after the river. Further west the Sieg valley forms the boundary of the
Bergisches Land (northern) and
Westerwald
The Westerwald (; literally 'Western forest') is a low mountain range on the right bank of the river Rhine in the German federal states of Rhineland-Palatinate, Hesse and North Rhine-Westphalia. It is a part of the Rhenish Massif ( or Rhenish ...
(southern). The river finally runs through a protected area east of the city of
Bonn
The federal city of Bonn ( lat, Bonna) is a city on the banks of the Rhine in the German state of North Rhine-Westphalia, with a population of over 300,000. About south-southeast of Cologne, Bonn is in the southernmost part of the Rhine-Ru ...
.
After passing the cities of
Hennef and
Siegburg
Siegburg (i.e. ''fort on the Sieg river''; Ripuarian: ''Sieburch'') is a city in the district of Rhein-Sieg-Kreis in North Rhine-Westphalia, Germany. It is located on the banks of the rivers Sieg and Agger, 10 kilometres from the former seat ...
, the river flows into the Rhine at the ''Naturschutzgebiet Siegaue'', a protected area immediately to the northeast of the city of Bonn, near
Niederkassel/.
Sieg Spring

The Sieg Spring (german: Siegquelle), the source of the Sieg, is at an elevation of , near the village of , North Rhine-Westphalia. The location was restored in 2013.
Tributaries
The main tributaries of the Sieg are, from source to mouth:
*
Ferndorfbach (right)
*
Weiß
Weiss or Weiß may refer to:
People
* Weiss (surname), including spelling Weiß
* Weiss Ferdl (1883-1949), German actor
Places
* Mount Weiss, Jasper National Park, Alberta, Canada
* Weiss Lake, Alabama
* Weiß (Sieg), a river in North Rhine-West ...
(left)
*
Asdorf (right)
*
Heller (left)
*
Wisser Bach (right)
*
Nister (left)
*
Bröl
The Bröl (also called the Brölbach or the Homburgische Bröl) is a 45.1 km long right tributary of the Sieg in North Rhine-Westphalia, Germany.
The river flows through the districts of Rhein-Sieg-Kreis and Oberbergischer Kreis. The ...
(right)
*
Wahnbach (right)
*
Pleisbach (left)
*
Agger Agger may refer to:
* Agger (surname)
* Agger (ancient Rome), a type of ancient Roman rampart or embankment
* Agger (river), a river in North Rhine-Westphalia, Germany
* Agger nasi, an anatomical feature of the nose
* Agger Rockshelter, in Wisconsi ...
(right)
See also
*
List of rivers of North Rhine-Westphalia
A list of rivers of North Rhine-Westphalia, Germany:
A
* Aa, left tributary of the Möhne
* Aa, left tributary of the Nethe
* Aa, left tributary of the Werre
* Aabach, tributary of the Afte
* Aabach, small river in the Ems river system
*Abbabach ...
*
List of rivers of Rhineland-Palatinate
References
Rivers of North Rhine-Westphalia
Rivers of Rhineland-Palatinate
Rivers of Siegerland
Rivers of the Westerwald
Rivers of Germany
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