Große Aa (disambiguation)
The Große Aa is a tributary of the Ems in Lower Saxony, Germany. Große Aa may also refer to:

Gross Aa (Sempachersee), a tributary of Lake Sempach in the canton of Lucerne, Switzerland
Große Aa (Aabach), a tributary of the Aabach in North Rhine-Westphalia, Germany
Große Aa, an alternative name for the middle course of the Aabach (Afte), a tributary of the Afte in North Rhine-Westphalia, Germany

See also
 AA (disambiguation)