| Conventional Long Name: | State of Assam |
| Common Name: | Assam |
| Nation: | India |
| Subdivision: | State |
| Year Start: | 1947 |
| Year End: | 1963 |
| P1: | Assam Province |
| S1: | Assam |
| S2: | Nagaland |
| S3: | Meghalaya |
| S4: | Mizoram |
| S5: | Arunachal Pradesh |
| Flag P1: | British Raj Red Ensign.svg |
| Flag S1: | Flag of Assam.svg |
| Flag S2: | Flag of Nagaland.svg |
| Flag S3: | Meghalaya Flag(INDIA).png |
| Flag S4: | Mizoram Flag(INDIA).png |
| Flag S5: | Flag of Arunachal Pradesh.svg |
| Image Map Caption: | Assam in 1936 before division |
| Capital: | Shillong |
| Stat Area1: | 121908[1] [2] |
| Stat Area2: | 202270[3] |
Greater Assam refers to the then undivided greater state of Assam in India soon after the Indian Independence in 1947 until 1963. In addition to the present-day Assam, it included the current states of Arunachal Pradesh, Meghalaya, Nagaland and Mizoram. The capital of this state was Shillong, currently the capital of Meghalaya.[4] Undivided Assam included five of the seven contiguous states of Northeast India—with Tripura and Manipur not being a part of it.
Prior to the Partition of India, Sylhet was a part of Assam.
Undivided Assam had a total area of 234568km2 which is slightly smaller than the nation of Ghana. The present day population of Undivided Assam would be 50 million which is slightly less than the population of South Korea.
After the partition, Undivided Assam was carved into following states:
| Date | State/UT | Country | Note |
|---|---|---|---|
| 15 Aug 1947 | Assam |  India | Became states of Republic of India |
| 1 Dec 1963 | Nagaland | ||
| 2 Apr 1970 | Meghalaya | ||
| 21 Jan 1972 | Mizoram | ||
| 21 Jan 1972 | Arunachal Pradesh |