Ujung Kulon National Park is located at the western-most tip of Java, Indonesia. It includes the volcanic island group of Krakatoa and other islands including Handeuleum and Peucang. The park encompasses an area of 1,206 km² (443 km² marine), most of which lies on a peninsula reaching into the Indian Ocean.

It is Indonesia's first national park and was declared a UNESCO World Heritage Site in 1992 for containing the largest remaining lowland rainforest in Java. It is also one of only two homes of the critically endangered Javan Rhinoceros. A population of fifty to sixty live in Ujung Kulon, a smaller population of possibly 10 or less, live in Cat Tien National Park, Vietnam. The mainland part of Ujung Kulon was formerly farmland until it was devastated and depopulated by the 1883 eruption of Krakatoa after which it returned to its original forested state.

Permits for the park are available at the town of Labuan, where there is a National Park office. There is also an office at Tamanjaya. Accommodation is available on Handeuleum and Peucang islands.