The tallest group of people on Earth is not located in the US nor as generally believed to emerge from the Asia.

All you need is to travel to South Sudan then located the Dinka people. You will be amazed to meet yourself becoming a dwarf in their midst as an average number of them are taller than 6 feet height.

Check the picture below aside these two guys a closer look at the hut in the background, you will see someone in red who is watching afar off too exhibiting the same height.

The Dinka people (Dinka: Jiɛ̈ɛ̈ŋ) are a Nilotic ethnic group native to South Sudan with a sizable diaspora population abroad. The Dinka mostly live along the Nile, from Jonglei to Renk, in the region of Bahr el Ghazal, Upper Nile (two out of three Provinces which were formerly located in southern Sudan) and the Abyei Area of the Ngok Dinka in South Sudan.

They number around 4.5 million people according to the 2008 Sudan census, constituting about 18% of the population[1] of the entire country, and the largest ethnic tribe in South Sudan.
Dinka, or as they refer to themselves, Muonyjang (singular) and jieng (plural), make up one of the branches of the River Lake Nilotes (mainly sedentary agripastoral peoples of the Nile Valley and African Great Lakes region who speak Nilotic languages, including the Nuer and Luo). Dinka are sometimes noted for their height. With the Tutsi of Rwanda, they are believed to be the tallest people in Africa.

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Roberts and Bainbridge reported the average height of 182.6 cm (5 ft 11.9 in) in a sample of 52 Dinka Agaar and 181.3 cm (5 ft 11.4 in) in 227 Dinka Ruweng measured in 1953–1954.

However, it seems the stature of today's Dinka males is lower, possibly as a consequence of undernutrition and conflicts. An anthropometric survey of Dinka men, war refugees in Ethiopia, published in 1995 found a mean height of 176.4 cm (5 ft 9.4 in). Other studies of comparative historical height data and nutrition place the Dinka as the tallest people in the world.

The Dinka people have no centralised political authority, instead comprising many independent but interlinked clans. Some of those clans traditionally provide ritual chiefs, known as the "masters of the fishing spear" or beny bith, who provide leadership for the entire people and appear to be at least in part hereditary.

Their language, called Dinka or "Thuɔŋjäŋ" (Thoŋ ë Muɔnyjäŋ), is one of the Nilotic languages of the eastern Sudanic language family. The name means "people" in the Dinka language.[citation needed] It is written using the Latin alphabet with a few additions.
Source:https://en.m.wikipedia.org/wiki/Dinka_people