Original: There is a neighboring region, called the North Central India Cultural Zone, including the states of Bihar, Chhattisgarh, Delhi, Haryana, Jharkhand, Madhya Pradesh, Rajasthan, Uttarakhand and Uttar Pradesh, that is also defined by the Indian Government.
Simplified: As a linguistic-cultural and political region, North India consists of twelve Indian states: Himachal Pradesh, Uttarakhand, Haryana, Punjab, Uttar Pradesh, Bihar, Jharkhand, Chhatisgarh, Madhya Pradesh and Rajasthan  (Bihar and Jharkhand are also considered as parts of East India).