Ladakh (/ləˈdɑːk/) is a region administered by India as a union territory and constitutes an eastern portion of the larger Kashmir region that has been the subject of a dispute between India and Pakistan since 1947 and India and China since 1959. Ladakh is bordered by the Tibet Autonomous Region to the east, the Indian state of Himachal Pradesh to the south, both the Indian-administered union territory of Jammu and Kashmir and the Pakistan-administered Gilgit-Baltistan to the west, and the southwest corner of Xinjiang across the Karakoram Pass in the far north. It extends from the Siachen Glacier in the Karakoram range to the north to the main Great Himalayas to the south. The eastern end, consisting of the uninhabited Aksai Chin plains, is claimed by the Indian Government as part of Ladakh, and has been under Chinese control since 1962.

In the past, Ladakh gained importance from its strategic location at the crossroads of important trade routes, but as Chinese authorities closed the borders between Tibet Autonomous Region and Ladakh in the 1960s, international trade dwindled. Since 1974, the Government of India has successfully encouraged tourism in Ladakh. As Ladakh is strategically important, the Indian military maintains a strong presence in the region.

The largest town in Ladakh is Leh, followed by Kargil, each of which headquarters a district. The Leh district contains the Indus, Shyok and Nubra river valleys. The Kargil district contains the Suru, Dras and Zanskar river valleys. The main populated regions are the river valleys, but the mountain slopes also support pastoral Changpa nomads. The main religious groups in the region are Muslims (mainly Shia) (46%), Buddhists (mainly Tibetan Buddhists) (40%), and Hindus (12%) with the remaining 2% made of other religions. Ladakh is one of the most sparsely populated regions in India. Its culture and history are closely related to those of Tibet.

Ladakh was established as a union territory of India on 31 October 2019, following the passage of the Jammu and Kashmir Reorganisation Act. Prior to that, it was part of the Jammu and Kashmir state. Ladakh is both the largest and the second least populous union territory of India.

History
Main article: History of Ladakh
Ancient history

South Asia in 565 CE
Rock carvings found in many parts of Ladakh indicate that the area has been inhabited from Neolithic times. Ladakh’s earliest inhabitants consisted of nomads known as Kampa. Later settlements were established by Mons from Kullu and Brokpas who originated from Gilgit. Around the 1st century, Ladakh was a part of the Kushan Empire. Buddhism spread into western Ladakh from Kashmir in the 2nd century. The 7th-century Buddhist traveller Xuanzang describes the region in his accounts. Xuanzang’s term of Ladakh is Mo-lo-so, which has been reconstructed by academics as *Malasa, *Marāsa, or *Mrāsa, which is believed to have been the original name of the region.

For much of the first millennium, western Tibet comprised Zhangzhung kingdom(s), which practised the Bon religion. Sandwiched between Kashmir and Zhangzhung, Ladakh is believed to have been alternatively under the control of one or other of these powers. Academics find strong influences of Zhangzhung language and culture in “upper Ladakh” (from the middle section of the Indus valley to the southeast). The penultimate king of Zhangzhung is said to have been from Ladakh.

From around 660 CE, the Tang dynasty and the Tibetan Empire started contesting the “four garrisons” of the Tarim Basin (present day Xinjiang), a struggle that lasted three centuries. Zhangzhung fell victim to Tibet’s ambitions in c. 634 and disappeared. India’s Karkota Empire and the Umayyad Caliphate too joined the contest for Xinjiang soon afterwards. Baltistan and Ladakh were at the centre of these struggles. Academics infer from the slant of Ladakhi chronicles that Ladakh may have owed its primary allegiance to Tibet during this time, but that it was more political than cultural. Ladakh remained Buddhist and its culture was not yet Tibetan.