The Dudhwa National Park is a national park in the Terai of Uttar Pradesh, India and a part of the Dudhwa Tiger Reserve. It is located on the Indo-Nepal border in the Lakhimpur Kheri District and represents one of the few remaining examples of a highly diverse and productive Terai ecosystem; the northern edge of the reserve lies along the Indo-Nepal border and the southern boundary is marked by the river Suheli. The area of the Park is composed of a vast alluvial plain along the tributaries of Mohana and Suheli, interspersed with numerous rivulets, lakes and pools.  The park has some of the best forests of 'Sal' tree in the world, amongst other flora; and is a virtual unexplored paradise for nature lovers, wildlife enthusiasts and bird watchers. The Dudhwa National Park, Kishanpur Wildlife Sanctuary and Katarniaghat Wildlige Sanctuary together comprised to form the Dudhwa Tiger Reserve, established in 1987.

It is well known sanctuary of the swamp deer and is home to tigers, leopards, varieties of deer, antelopes, elephants, jackal, hyena etc, amid thick green forest and grassland. It is also a bird watchers' heaven. A large number of rhinos are also found here, making it a unique experience in itself!