The Kudumbur River is a river that flows mainly through the Kasaragod district of the Indian state of Kerala, although its source and some early sections are in the Kodagu and Dakshina Kannada districts of Karnataka.

The Kudumbur's source is located in Talakaveri Wildlife Sanctuary in the Western Ghats of Karnataka.

From its source it flows west, crossing into Kerala east of Panathur in Vellarikundu taluk.

It continues west, passing to the north of Panathady and to the south of Karivedakam, before turning south for a short distance and passing to the west of Kallar.

After this, it turns west again, and forms part of the border between Vellarikundu and Kasaragod taluks.