The political map of India have been altered a lot after Independence. Some of the major alterations / formation of the states are as :
| State | Year of Creation | Act Related to Creation | Description |
|---|---|---|---|
| Nagaland | 1st December, 1963 | State of Nagaland Act, 1962 | It was carved out from the State of Asom after the disturbances caused by Nagas in 1955 demanding political union of their ancestral and native groups. However, before giving Nagaland the status of State, it was kept under Assam governor in 1961. |
| Andhra Pradesh | 1st October, 1953 | State of Andhra Pradesh Act 1953 | Andhra Pradesh was created after death of Potti Sriramulu (Standing person of Congress) who remained on hunger strike for 56 days demanding creation of a new state. Andhra Pradesh separated Telugu Speaking areas for the Madras state. |
| Kerala | 1st November, 1956 | State Reorganisation Act, 1956 | The agitations envisaged at the joint meeting of Kerala Pradesh Congress Committee, Kochi Rajya Prajamandalam and Travancore State Congress for the formation of Aikya Kerala was the base of the formation of Kerala. Kerala comprised Travancor and Cochin areas. |
| Gujarat and Maharashtra | 1st May, 1960 | Bombay Reorganisation Act, 1960 | The bilingual State of Mumbai was divided into two States : Maharashtra(for Marathi Speaking People) and Gujarat(Gujarati Speaking People). |
| Haryana | 1st November, 1966 | Punjab (Reorganisation) Act, 1966 | It was carved out from the State of Punjab after the Punjabi Suba movement, led by the Akali Dal, for formation of the Punjabi-majority Punjab state, the Hindi-majority Haryana state and the Union Territory of Chandigarh. |
| Himachal Pradesh | 25th January, 1971 | Himachal Pradesh Act, 1970 | After the partition of Punjab, Haryana and Chandigarh, a large part of pahari parts were merged together and thus it became important for the government to provide them a separate state. |
| Meghalaya | 2nd April, 1970 | North-Eastern Areas (Reorganisation) Act 1971 | First carved out as a sub-State within the State of Asom by 23 Constitutional Amendment Act, 1969. Later in 1971, it received the status of a full-fledged State by the North-Eastern Areas (Reorganisation) Act 1971 |
| Manipura and Tripura | 21st January, 1972 | North-Eastern Areas (Reorganisation) Act 1971 | Both these States were elevated from the status of Union-Territories by the North-Eastern Areas (Reorganisation) Act 1971. This Act also led to the formation of two union territories, namely, Arunachal Pradesh and Mizoram. |
| Sikkim | 16th May, 1975 | 36th Amendment Act, 1975 | Sikkim was first given the Status of Associate State by the 35th Constitutional Amendment Act 1974 but it could not satisfy the aspirations of the people of sikkim, to become an integral part of India. Atlast, Sikkim got the status of a full State in 1975 by the 36th Amendment Act, 1975 |
| Mizoram | 20th February, 1987 | State of Mizoram Act, 1986 | North-Eastern Areas (Reorganisation) Act 1971 led to the formation of Mizoram as Union Territory but was later given the full status of State. |
| Arunachal Pradesh | 20th February, 1987 | State of Arunachal Pradesh Act, 1986 | North-Eastern Areas (Reorganisation) Act 1971 led to the formation of Arunachal Pradesh as Union Territory but was later given the full status of State. |
| Goa | 30th March, 1987 | Daman and Diu Reorganisation Act 1987 | Goa was separated from the Union-Territory of Goa, Daman and Diu and was made a full-fledged State of Goa, Daman and Diu Reorganisation Act 1987. But Daman and Diu remained as Union Territory |
| Chhattisgarh | 1st November, 2000 | Constitutional Amendment Act, 2000 | Formed by the Constitutional Amendment Act, 2000 by dividing Madhya Pradesh on November 1, 2000 |
| Uttarakhand | 9th November, 2000 | Constitutional Amendment Act, 2000 | Formed by the Constitutional Amendment Act, 2000 by dividing Uttar Pradesh on November 9, 2000 |
| Jharkhand | 15th November, 2000 | Constitutional Amendment Act, 2000 | Formed by the Constitutional Amendment Act, 2000 by dividing Bihar on November 15, 2000 |
