| Conventional Long Name: | Irkutsk Governorate |
| Common Name: | Irkutsk |
| Subdivision: | Governorate |
| Nation: | Russian Empire (1764–1917), Russian Republic, and RSFSR (1917–1926) |
| Capital: | Irkutsk |
| Year Start: | 1764 |
| Year End: | 1926 |
| Image Map Caption: | Irkutsk Governorate within the Russian Empire |
| P1: | Siberia Governorate |
| S1: | Siberian Krai |
| Stat Year2: | 1897[1] |
| Stat Area1: | 743,480 |
| Stat Pop2: | 514,267 |
| Political Subdiv: | Yakutsk Oblast |
Irkutsk Governorate (Russian: Иркутская губерния|Irkutskaya guberniya) was an administrative-territorial unit (guberniya) of the Russian Empire, located in Siberia. It existed from 1764 to 1926; its seat was in the city of Irkutsk.