The Aue is a river in northern Germany in the district of Stade in Lower Saxony. It has a length of about 30 km (19 mi).

The Aue rises in the vicinity of Klethen [de; nds] near Ahlerstedt and flows through the towns and villages of:

• Ahrensmoor-West,
• Ahrenswohlde,
• Bokel,
• Klethen,
• Oersdorf,
• Kakerbeck,
• Bargstedt/Klein Hollenbeck,
• Harsefeld,
• Issendorf and
• Bliedersdorf

to Horneburg, where it changes its name and from there on flows as the Lühe for a further 12.7 km (7.9 mi) to the River Elbe.

In August 2002 a flood, caused by a long period of heavy rain in the catchment area of the river, broke through the dykes at Horneburg and caused considerable damage there. Horneburg responded to the threat of further flooding by building a stronger quay wall within the village and renovating the dykes.

• 
  The Aue in Ahrensmoor
• 
  The Aue near Ahrenswohlde
• 
  The Aue in Oersdorf
• 
  The Aue in Klethen
• 
  The Aue in Kakerbeck
• 
  Source of the Aue near Ahrensmoor-Nord
• 
  The Aue near Harsefeld (June 2017)

• List of rivers of Lower Saxony