| Tunkinsky National Park | |
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| Location | Tunkinsky District of the Republic of Buryatia |
| Nearest city | Irkutsk |
| Coordinates | 51°41′N 102°08′E / 51.683°N 102.133°E |
| Area | 1,183,662 hectares (2,924,893 acres; 11,837 km2; 4,570 sq mi) |
The Tunka or Tunkinsky National Park (Russian: Тункинский) is a national park located in south central Siberia. It covers a mountainous region centered on the Irkut River valley (also referred to as the Tunka Valley) that continues from the rift valley of Lake Baikal southwest to the border of Mongolia. To the north and west of the valley is the eastern edge of the Sayan Mountains. To the east are the lower Khamar-Daban mountains. About 1,183,662 hectares (2,924,893 acres; 11,837 km2; 4,570 sq mi) in size, the park occupies the entirety of the Tunkinsky District of the Republic of Buryatia.