
The Sunda Strait is the strait between the Indonesian islands of Java and Sumatra. It connects the Java Sea to the Indian Ocean. The name came from Sunda Kingdom, a kingdom ruling the west part of Java. It also comes from the name of the Sundanese people, the native people of West Java, with the Javanese people being found mostly in Central and East Java.

On 22 December 2018, a tsunami that followed an eruption and partial collapse of the Anak Krakatau volcano in the Sunda Strait struck several coastal regions of Banten in Java and Lampung in Sumatra, Indonesia. At least 426 people were killed and 14,059 were injured. The tsunami was caused by an undersea landslide that followed an eruption of Anak Krakatau, the "Child of Krakatoa". On 23 December, it was found that much of the island of Anak Krakatau had collapsed into the sea.

Rakata or Greater Krakatau is a partially collapsed stratovolcano on the Indonesian island of Krakatoa in the Sunda Strait between the islands of Sumatra and Java. Standing 813 metres (2,667 ft) tall, it was the largest and southernmost of three volcanoes that formed the island Krakatoa and the only one not totally destroyed in the eruption of 1883. Rakata is the last remnant of the original island prior to its destruction. However, Rakata did lose its northern half in that eruption, leaving just its southern half. The exposed cliff is quite striking visually, partially of a large exposed dike terminating in a large lenticular extrusion at the middle of the almost vertical cliff. The feature has been called "the Eye of Krakatoa."

The Sunda Strait Bridge is a planned road and railway megaproject between the two large Indonesian islands of Sumatra and Java. The suggestion for a bridge was reportedly first put forward in 1960 by Professor Sedyatmo from Institut Teknologi Bandung as a part of broader plans, known as Tri Nusa Bimasakti, to link the three islands of Sumatra, Java and Bali.

The Sunda Strait campaign of January 1794 was a series of manoeuvres and naval actions fought between warships and privateers of the French Republic and a squadron of vessels sent by the British East India Company to protect trade in the region, later augmented by Dutch warships. The campaign developed as French forces based on Île de France reacted more quickly than the British forces in the Indian Ocean to the expansion of the French Revolutionary Wars on 1 February 1793. French privateers rapidly spread along the British trade routes in the Far East, becoming concentrated around the narrow Sunda Strait between the islands of Java and Sumatra in the Dutch East Indies. These ships were soon joined by French Navy frigates and began to inflict losses on shipping in the region. The Royal Navy forces in the Indian Ocean were deployed elsewhere and so the East India Company, the private enterprise that ruled much of British India in the 1790s and maintained their own fleet and navy, raised a squadron of armed merchant ships to patrol the Strait and drive off the raiders.

The Sunda Straits Crisis was a two-week confrontation between the United Kingdom and Indonesia over the passage of the Illustrious-class aircraft carrier HMS Victorious through the Sunda Strait, a major waterway separating the Indonesian islands of Java and Sumatra, occurring between August and September 1964. The incident was part of the larger Indonesia-Malaysia confrontation, an armed conflict between Indonesia and Malaysia over the formation of the latter as an independent state.

Tanjung Layar, formerly Java's Eerste Punt in Dutch, and Java's First Point, or Java Head in English is a prominent cape at the extreme western end of Java, at the Indian Ocean entrance to the Sunda Strait. Java Head is a bluff at the sea's edge with higher land beyond, visible from a significant distance at sea, with deep water close to the shore. Its name means "sail cape" because of the shape of a rock close to its shore. Cape Gede, the westernmost point of Java, is located in its southwestern part.

Ujung Kulon National Park is at the westernmost tip of Java, in Banten province of Indonesia. It includes the volcanic island group of Krakatoa in Lampung province, and other islands including Panaitan, as well as smaller offshore islets such as Handeuleum and Peucang in the Sunda Strait.