Kongu Nadu is a region and aspirant state of India comprising the western part of the Tamil Nadu and parts of the states of Karnataka and Kerala. In the ancient Tamilakam, it was the seat of the Chera kings, bounded on the east by Tondai Nadu, on the south-east by Chola Nadu and on the south by Pandya Nadu regions. Kongu Nadu has the highest Urban area in the state of Tamil Nadu and contributes to two-thirds of the state's revenues.