The East Siberian Oblast was an early oblast of the Russian Soviet Federative Socialist Republic, which existed from December 5, 1936 to September 26, 1937. It was created when the East Siberian Krai was divided into the East Siberian Oblast and the Buryat Autonomous Soviet Socialist Republic in 1936 and ceased to exist after being split into the Irkutsk Oblast and the Chita Oblast in 1937.
| Conventional Long Name: | East Siberian oblast |
| Common Name: | East Siberia |
| P1: | East Siberian Krai |
| S1: | Irkutsk Oblast |
| S2: | Chita Oblast |
| Capital: | Irkutsk[1] |
| Date Start: | December 5 |
| Year Start: | 1936 |
| Date End: | September 26 |
| Year End: | 1937 |
| Stat Year1: | 1937 |
| Stat Pop1: | 1,897,049 [2] |
| Demonym: | East Siberian |
According to the 1937 All-Union Census, its population was 1,897,049 persons.[3]
The Oblast was made up of 45 districts and its administrative centre was the city of Irkutsk.[4]