India as a nation is a federal republic of 28 states and 7 union territories. Indians often tends to divide India into two .
Any thing in the north is North India and anything south of them is South India. What about the east and west of India? And many times the islands - Lakshadweep islands and Andaman & Nicobar Islands - slip out of the bracket.
Though not in any strict administrative terms Indian states are grouped into regions like North India, South India, East India, West India, North East India Lakshadweep