The Aavoja Reservoir (, also known as ) is a lake in Estonia. It is located in the villages of Vikipalu and ÃÂlejõe in Anija Parish, Harju County, on the Aavoja River.
The reservoir is part of the Tallinn water supply system and is connected to the Jägala, Pirita, and Soodla rivers via canals.
The lake has an area of . The lake has an average depth of and a maximum depth of . It is long, and its shoreline measures . It has a volume of .
Construction of the reservoir took place between 1980 and 1983.