Kleine Aa may refer to:
Chli Aa (Schwyz), a river in canton of Schwyz, Switzerland Chli Aa (Sempachersee), a tributary of Lake Sempach in the canton of Lucerne, Switzerland Kleine Aa (Aabach), a tributary of the Aabach in North Rhine-Westphalia, Germany Kleine Aa (Someren), headwater stream of the Aa (Meuse) in the province of North Brabant, Netherlands
See also AA (disambiguation)