Bardiya National Park is a protected area in Nepal that was established in 1988 as Royal Bardia National Park. Covering an area of 968 km2 (374 sq mi) it is the largest and most undisturbed wilderness area in Nepal's Terai, adjoining the eastern bank of the Karnali River in the Bardiya District.
The northern limits of the protected area are demarcated by the crest of the Siwalik Hills. The Nepalgunj-Surkhet highway partly forms the southern boundary, but seriously disrupts the protected area. Natural boundaries to human settlements are formed in the west by the Geruwa, a branch of the Karnali River, and in the southeast by the Babai River.Together with the neighboring Banke National Park, the coherent protected area of 1,437 km2 (555 sq mi) represents the Tiger Conservation Unit (TCU) Bardia-Banke that extends over 2,231 km2 (861 sq mi) of alluvial grasslands and subtropical moist decidous forests.