There exists also another river named Aurach that is a tributary of the Regnitz, see Aurach (Regnitz, Oberfranken). For other uses, see Aurach (disambiguation).

Aurach
Location of mouth in Bavaria
Location
Country	Germany
State	Bavaria
Physical characteristics
Mouth
• location	Regnitz
• coordinates	49°34′16″N 10°59′00″E / 49.5712°N 10.9834°E / 49.5712; 10.9834
Length	39.3 km (24.4 mi) [1]
Basin size	165 km2 (64 sq mi) [1]
Basin features
Progression	Regnitz→ Main→ Rhine→ North Sea

Aurach (German pronunciation: [ˈaʊ̯ʁax] ^ⓘ; also: Mittlere Aurach) is a river in Bavaria, Germany. It is a tributary of the river Regnitz.

The river Aurach begins in the Franconian Heights to the west of the village of Klausaurach in the municipality of Markt Erlbach. It runs through Aurachtal, the town of Herzogenaurach, and the Erlangen district of Frauenaurach. After crossing under the Main-Danube Canal, it joins the river Regnitz at the Erlangen district of Erlangen-Bruck.

A recreational cycle path runs alongside the river from Herzogenaurach to Erlangen.

• List of rivers of Bavaria