| YEAR | DATE | EVENT | GOVERNOR |
| 1756 | Part of UK Bengala | ||
| 1912 | 1 april | Indian provence of Bihar and Orissa | |
| 1936 | 1 april | Indian provence | Sir James David Sifton |
| 1937 | 11 march | Sir Maurice Garnier Hallett | |
| 1939 | 5 august | Sir Thomas Alexander Stewart | |
| 1943 | 9 january | Sir Thomas George Rutherford (I) | |
| 1943 | march | Sir Robert Francis Mudie | |
| 1944 | Sir Thomas George Rutherford (II) | ||
| 1946 | 13 may | Sir Hugh Dow | |
| 1947 | 15 august | Indian provence | |
| 1950 | 26 january | Indian state |