The Großer Kellenberg is a hill, 211 m above sea level (NHN), in the Wiehen range in northern Germany.

It is exactly the same height as the hill, known as the Schwarzer Brink, which stands opposite the Großer Kellenberg on the Egge, a parallel side ridge of the Wiehen.

The Großer Kellenberg lies within the county of Osnabrück, on the territory of the town of Melle, and thus in the Lower Saxon part of the range.

The Großer Kellenberg is the westernmost hill on the main chain of the Wiehen that attains a height of over 200 metres.

Although it is on the main chain, the Großer Kellenberg does not form a prominent watershed in this area, because both the Glanebach, and the in- and outflows of the Grüner See empty into the River Hunte after a few kilometres.