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
India has more than 200 wildlife sanctuaries and about 100 of them are classified as National Parks. Here is a list of national parks of India. The names of the national parks are organized according to the state in which they belong to. Some of the national parks are speared over many states and only one state in listed in such cases. You can see the same list of national parks in India here arranged in the alphabetical order of their names.