Kakadu National Park is a protected area in the Northern Territory of Australia, 171 km southeast of Darwin.

The park is located within the Alligator Rivers Region of the Northern Territory. It covers an area of 19,804 km2 (7,646 sq mi), extending nearly 200 kilometres from north to south and over 100 kilometres from east to west. It is the size of Slovenia, about one-third the size of Tasmania, and nearly half the size of Switzerland. The Ranger Uranium Mine, one of the most productive uranium mines in the world, is surrounded by the park.

Kakadu has seen several invasive species that threaten the native habitat, particularly in recent decades. Introduced fauna including the water buffalo, wild pig and more recently, the cane toad have damaged habitat. Invasive weeds include Mimosa pigra, which covers 800 km2 of the Top End, including vast areas of Kakadu, invasive para grass (Urochloa mutica) displaces the native food of much of Kakadu's birdlife. Salvinia molesta has infested the Magela floodplain. Brumbies also inhabit areas of the National Park, including Yellow Water. The controversial Ranger Uranium mine, one of the world's most productive Uranium mines, is surrounded by the park, and presents a significant management challenge both now and into the future, with the question of how to safely contain low-level radioactive wastewater. The escape of contaminated wastewater into the Park's wetlands, which may become more likely under Climate-change induced rainfall events, would have a devastating impact on the Park's biodiversity.