Sariska Tiger Reserve, Tiger reserve and national park in Alwar district, Rajasthan, India.

Sariska Tiger Reserve covers 1,203.34 km² in Alwar district, Rajasthan, with a core area of 881 km² and a buffer zone of 322.23 km². It lies in the Aravalli Range, between 300 and 722 m in elevation, and holds scrub-thorn arid forest, dry deciduous forest and grassland where dhok (Anogeissus pendula) is the dominant tree. Chital, sambar, nilgai and the Bengal tiger live among its rocky hills.

Established as a wildlife sanctuary in 1955 and later designated as a tiger reserve in 1978 under Project Tiger, Sariska has a complex conservation history marked by periods of tiger population decline due to poaching before successful reintroduction programs were implemented.

The reserve incorporates ancient temple ruins dating from the 6th to 13th centuries, including Neelkanth temples, and the 17th-century Kankwari Fort, while the nearby Sariska Palace built by Alwar maharajas now serves as a heritage hotel within the sanctuary.

The reserve lies in Alwar district, about 107 km from Jaipur and 200 km from Delhi, and is reached via the Alwar road. Safaris run in the early morning and afternoon, and the reserve is closed during the monsoon. Roads crossing the reserve remain a constraint on wildlife, so visitors stay with vehicles on designated tracks.

Sariska holds the distinction of being one of the first tiger reserves in India to successfully reintroduce tigers after complete local extinction, with the reintroduction program beginning in 2008 using tigers relocated from Ranthambore National Park.