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The Alzette river in Luxembourg City
Countries  France,  Luxembourg
 - left Mess, Pétrusse, Mamer, Eisch, Attert, Wark
Cities Audun-le-Tiche, Esch-sur-Alzette, Luxembourg City, Ettelbruck
Source Étang de l'Alzette
 - location Thil, Meurthe-et-Moselle, France
 - elevation 305 m (1,001 ft)
 - coordinates 49°27′46″N 5°54′41″E / 49.46278°N 5.91139°E / 49.46278; 5.91139
 - location Sauer, Ettelbruck, Luxembourg
 - elevation 193 m (633 ft)
 - coordinates 49°50′53″N 6°06′43″E / 49.84806°N 6.11194°E / 49.84806; 6.11194
Length 73 km (45 mi)
Basin 1,172 km² (453 sq mi)
 - average 10.7 /s (378 cu ft/s)

The Alzette (Luxembourgish: Uelzecht, German: Alzig) is a river in France and Luxembourg. It is a right tributary of the Sauer river, and so it is part of the drainage basin of the Rhine river.

The Alzette river is sung in Ons Heemecht, the national anthem of Luxembourg (Luxembourgish: Wou d'Uelzécht durech d'Wisen zéit,..., French: Où l'Alzette arrose champs et prés..., German: Wo die Alzette durch die Wiesen zieht,...).


The Alzette river has a length of 73 km (45 mi) but only 2.7 km (1.7 mi) of them are in France. Its drainage basin has an area of 1,172 km2 (453 sq mi), most of it in Luxembourg.


The Alzette has its source in France in the territory of the commune of Thil in the department of Meurthe-et-Moselle (Lorraine), at an altitude of about 305 m (1,001 ft). It passes through the French communes of Villerupt (Luxembourgish: Weller) and Audun-le-Tiche (German: Deutsch-Oth, Luxembourgish: Däitsch-Oth.

After a few kilometers, the Alzette enters Luxembourg, flowing through the city of Esch-sur-Alzette (Luxembourgish: Esch-Uelzecht, German: Esch-an-der-Alzette or Esch-an-der-Alzig, French: Esch-sur-Alzette). At Lameschmillen (near Bergem) it is joined by the Mess river.

It flows on a wide floodplain before getting into a narrow valley near Hesperange. Then it flows through the Luxembourgish cities of Luxembourg (where it is joined by the Pétrusse river) and Mersch (where is joined by the Mamer and Eisch rivers). It joins, as a right tributary, the Sauer river near Ettelbruck, at about 193 m (633 ft) of altitude.

Main tributaries

The main tributaries of the Alzette rivers are left tributaries; those that join the river by the right side are very small streams.

  • Left tributary
    • Mess - 13.7 km
    • Pétrusse - 12.8 km
    • Mamer - 25.6 km
    • Eisch - 23.2 km
    • Attert - 30.5 km
    • Wark - 30.5 km


Related pages

See also

Kids robot.svg In Spanish: Río Alzette para niños

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Alzette Facts for Kids. Kiddle Encyclopedia.