What are the countries of origin for hinduism?

Hinduism is a term for a wide variety of related religious traditions native to India.[1] Historically, it encompasses the development of Religion in India since the Iron Age traditions, which in turn hark back to prehistoric religions such as that of the Bronze Age Indus Valley Civilization followed by the Iron Age Vedic religion.

Wikipedia has a great primer on the history of Hinduism (http://en.wikipedia.org/wiki/History_of_Hinduism).