| Aue | |
| Pushpin Map: | Lower Saxony |
| Pushpin Map Caption: | Location of mouth |
| Subdivision Type1: | Country |
| Subdivision Type2: | Location |
| Subdivision Name2: | Lower Saxony, Germany |
| Subdivision Type3: | Reference no. |
| Subdivision Name3: | DE: 596 |
| Length: | 31.5 km |
| Source1 Location: | near Ahlerstedt |
| Source1 Coordinates: | 53.4116°N 9.4867°W |
| Mouth Location: | In Horneburg at its confluence with the Landwettern to form the Lühe |
| Mouth Coordinates: | 53.5121°N 9.5909°W |
| Basin Landmarks: | Villages: Ahlerstedt, Bargstedt, Harsefeld, Bliedersdorf, Horneburg |
| River System: | Elbe |
| Progression: | Lühe → Elbe → North Sea |
| Tributaries Right: | Brakengraben, Steinbeck, Landwettern, Rellerbach |
| Tributaries Left: | Tiefenbach |
| Custom Label: | References |
The Aue is a river in northern Germany in the district of Stade in Lower Saxony. It has a length of about .
The Aue rises in the vicinity of near Ahlerstedt and flows through the towns and villages of:
to Horneburg, where it changes its name and from there on flows as the Lühe for a further 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.