The Kondopoga Bay (Russian: Кондопожская губа, Kondopozhskaya Bay) is a bay (length 32 km, width over 8 km, max depth 78m) in the northwestern part of the Karelian part of the Onega Lake, Russia .
The Kondopoga Bay is deeply carved in the land by glacial process. The upper part of the bay receives about 90% of the waters of the Suna River via the Nigozersky (Kondopozhsky) Canal. The bay also receives waste water, most of which comes from the Kondopoga paper mill.
A city of Kondopoga is by the northern tip of the bay.
The bay has numerous rock islands, the largest being Suisari.
Coordinates: 62°01′18″N 34°35′25″E / 62.0217°N 34.5903°E