Tibet is a plateau region in Asia, north-east of the Himalayas. It is the traditional homeland of the Tibetan people as well as some other ethnic groups such as Monpas, Qiang, and Lhobas, and is now also inhabited by considerable numbers of Han and Hui people. Tibet is the highest region on earth, with an average elevation of 4,900 metres (16,000 ft).

Tibet was incorporated into the People's Republic of China (PRC) and the previous Tibetan government was abolished in 1959. Today, the PRC governs western and central Tibet as the Tibet Autonomous Region while eastern areas are mostly within Sichuan and Qinghai provinces.

The economy of Tibet is dominated by subsistence agriculture, though tourism has become a growing industry in Tibet in recent decades. The dominant religion in Tibet is Tibetan Buddhism, in addition there is Bön which was the indigenous religion of Tibet before the arrival of Buddhism in the 7th century CE though there are also Muslim and Christian minorities. Tibetan Buddhism is a primary influence on the art, music, and festivals of the region. Tibetan architecture reflects Chinese and Indian influences. Staple foods in Tibet are roasted barley, yak meat, and butter tea.

Tibet is located on the Tibetan Plateau, the world's highest region.All of modern China, including Tibet, is considered a part of East Asia. Historically, some European sources also considered parts of Tibet to lie in Central Asia. Tibet is west of the Central China plain, and within mainland China, Tibet is regarded as part of "the Western section", meaning "Western China".

Tibet is often called the "roof of the world." Tibet has some of the world's tallest mountains, with several of them making the top ten lists. Mount Everest, at 8,848 metres (29,029 ft), is the highest mountain on earth, located on the border with Nepal. Several major rivers have their source in the Tibetan Plateau (mostly in present-day Qinghai Province). These include Yangtze, Yellow River, Indus River, Mekong, Ganges, Salween and the YarlungTsangpo River (Brahmaputra River). The YarlungTsangpo Grand Canyon, along the YarlungTsangpo River, is among the deepest and longest canyons in the world.

Tibet has been called the "Water Tower" of Asia, and China is investing heavily in water projects in Tibet.

The Indus and Brahmaputra rivers originate from a lake in Western Tibet, near Mount Kailash. The mountain is a holy pilgrimage site for both Hindus and Tibetans. The Hindus consider the mountain to be the abode of Lord Shiva. The Tibetan name for Mt. Kailash is Khang Rinpoche. Tibet has numerous high-altitude lakes referred to in Tibetan as tso or co. These include Qinghai Lake, Lake Manasarovar, Namtso, PangongTso, Yamdrok Lake, Siling Co, Lhamo La-tso, Lumajangdong Co, Lake Puma Yumco, Lake Paiku, Lake Rakshastal, Dagze Co and Dong Co. The Qinghai Lake (Koko Nor) is the largest lake in the People's Republic of China.

The atmosphere is severely dry nine months of the year, and average annual snowfall is only 18 inches (46 cm), due to the rain shadow effect. Western passes receive small amounts of fresh snow each year but remain traversable all year round. Low temperatures are prevalent throughout these western regions, where bleak desolation is unrelieved by any vegetation bigger than a low bush, and where wind sweeps unchecked across vast expanses of arid plain. The Indian monsoon exerts some influence on eastern Tibet. Northern Tibet is subject to high temperatures in the summer and intense cold in the winter.

Cultural Tibet consists of several regions. These include Amdo (Amdo) in the northeast, which is administratively part of the provinces of Qinghai, Gansu and Sichuan. Kham (Khams) in the southeast encompasses parts of western Sichuan, northern Yunnan, southern Qinghai and the eastern part of the Tibet Autonomous Region. Ü-Tsang (dBusgTsang) (Ü in the center, Tsang in the center-west, and Ngari (mNga' ris) in the far west) covered the central and western portion of Tibet Autonomous Region

Tibetan cultural influences extend to the neighboring states of Bhutan, Nepal, regions of India such as Sikkim, Ladakh, Lahaul, and Spiti, in addition to designated Tibetan autonomous areas in adjacent Chinese provinces.

Lhasa is Tibet's traditional capital and the capital of Tibet Autonomous Region. It contains two world heritage sites – the Potala Palace and Norbulingka, which were the residences of the Dalai Lama. Lhasa contains a number of significant temples and monasteries, including Jokhang and Ramoche Temple.

Shigatse is the second largest city in the Tibet AR, west of Lhasa. Gyantse and Qamdo are also amongst the largest.

Other cities and towns in cultural Tibet include Shiquanhe (Ali), Nagchu, Bamda, Rutog, Nyingchi, Nedong, Coqên, Barkam, Sakya, Gartse, Pelbar, Lhatse, and Tingri; in Sichuan, Kangding (Dartsedo); in Qinghai, Jyekundo (Yushu), Machen, and Golmud; in India, Tawang, Leh, and Gangtok.
Potala Palace

Standing at 117 meters in height and 360 meters in width, the Potala Palace is the most important example of Tibetan architecture. Formerly the residence of the Dalai Lama, it contains over one thousand rooms within thirteen stories, and houses portraits of the past Dalai Lamas and statues of the Buddha. It is divided between the outer White Palace, which serves as the administrative quarters, and the inner Red Quarters, which houses the assembly hall of the Lamas, chapels, 10,000 shrines, and a vast library of Buddhist scriptures. The Potala Palace is a World Heritage Site, as is Norbulingka, the former summer residence of the Dalai Lama.