Assam (Assamese: অসম, Hindi: आसाम, and also Hindi: असम) is a black tea named after the region of its production, Assam, in India. Assam tea (Assamese: অসমীয়া চাহ, Hindi: असमिया चाय) is manufactured specifically from the plant Camellia sinensis var. assamica (Masters). This tea, most of which is grown at or near sea level, is known for its body, briskness, malty flavor, and strong, bright color. Assam teas, or blends containing Assam, are often sold as "breakfast" teas. English Breakfast tea, Irish Breakfast tea, and Scottish Breakfast Tea are common generic names.

The state of Assam is the world's largest tea-growing region, lying on either side of the Brahmaputra River, and bordering Bangladesh and Burma (Myanmar). This part of India experiences high precipitation; during the monsoon period, as much as 10 to 12 inches (250–300 mm) of rain per day. The daytime temperature rises to about 103F (40 °C), creating greenhouse-like conditions of extreme humidity and heat. This tropical climate contributes to Assam's unique malty taste, a feature for which this tea is well known.

Assam /əˈsæm/ (Assamese: অসম) also, rarely, Assam Valley and formerly the Assam Province (British India), is a northeastern state of India and is one of the most culturally and geographically distinct regions of the country^{[citation needed]}. Assam was one of the original provinces of the British ruled Indian sub-continent and among the original provinces of present day India, having a legislature that dates back to 1937. However, present day Assam has undergone numerous territory alignment changes, with its state map being altered more than any other province's. Known for exquisite natural resources, geography and its important role in India's freedom struggle; Assam has its capital as Dispur, an especialized city circuit region located on the outskirts of its largest metropolis, Guwahati.

Assam is particularly famous for its natural beauty. The landscape includes tea gardens, the river Brahmaputra, and many historical monuments and temples. Swami Vivekananda once said that, "next only to Kashmir, Assam is the most beautiful place in India" A state with an abundance of forest, Assam also has five national parks, around half a dozen other wildlife sanctuaries, and is home to two-thirds of the population of the unique one-horned rhino. When it comes to wildlife, Assam too has successfully conserved the one-horned Indian rhinoceros from near extinction, along with the tiger and numerous species of birds, and it provides one of the last wild habitats for the Asian elephant. It is becoming an increasingly popular destination for wildlife tourism, and Kaziranga and Manas are both World Heritage Sites.

The people of Assam inhabit a multi-ethnic, multi-linguistic and multi-religious society. They speak languages that belong to three main language groups: Indo-Aryan, Austro-Asiatic, and Tibeto-Burman, with Tai languages fading out after being replaced by Aryan languages. However, ethnic Tai roots run very deep, not just in modern Assam, but the former Assam which corresponds to all of Northeastern India, as far back as 1980s some 8 million people claimed Ahom descent (more than a third), though some intermixing of races is expected. India has attempted to dilute the Mongoloid influence in favor of Aryans, over the decades, resulting in ethnic tensions. The large number of ethnic and linguistic groups, the population composition and the peopling process in the state has led to it being called an "India in miniature".

Geographically Assam contains fertile river valleys surrounded and interspersed by mountains and hills. It is accessible from Tibet in the north (via Bum La, Tse La, Tunga), across the Patkai in the Southeast (via Diphu, Kumjawng, Hpungan, Chaukam, Pangsau, More-Tamu) and from Burma across the Arakan Yoma (via An, Taungup). In the west both the Brahmaputra valley and the Barak valley open widely to the Gangetic plains. Assam has been populated via all these accessible points in the past. It has been estimated that there were eleven major waves and streams of ethnolinguistic migrations across these points over time.