John Rogan. John Rogan used to be the tallest American and tallest person alive before Robert Wadlow outmatch his record. Rogan was living from 1868-1905 and in his last day he was known as second tallest person in the world. 3. John F. Carroll (8 feet 7¾ inches or 2.64 meters) John F Carroll.
http://worldmost.org/tallest-man
The former record holder was Mongolian Bao Xishun who was measured at 7 ft 8.95 in on January 15 2005 at Chifeng City Hospital, Inner Mongolia, China. The UK's tallest man is Neil Fingleton, who was measured at 7ft 7.56ins at the Guinness World Records offices on January 29 2007. The tallest ever man was American Robert Pershing Wadlow, who was born in Alton, Illinois on 22 February 1918 and was last measured at 8ft 11.1in tall on 27 June 1940.
http://www.dailymail.co.uk/news/article-474101/New-worlds-tallest-man-stands-towering-8ft-5ins.html
On September 17, 2009, Turkey's Sultan Kösen overtook Bao Xishun as the tallest living man in the world, when he was measured by Guinness World Records, standing 2.51 metres (8 ft 3 in) tall.
https://en.wikipedia.org/wiki/Bao_Xishun
Green name - Tallest living person at one point from 1900 onwards. Robert Pershing Wadlow (February 22, 1918  July 15, 1940) was a man who, to this day, is the tallest person in medical history for whom there is irrefutable evidence. He is often known as the Alton Giant because of his Alton, Illinois hometown.
http://www.thetallestman.com/
Story highlights. 1  For the first time, the tallest recorded man in the world met the shortest man. 2  Sultan Kosen, 31, is a Turkish farmer who measures 8 feet, 3 inches tall. 3  Nepalese weaver Chandra Bahadur Dangi, 74, is just 21½ inches tall.  The two men met in London for the 10th annual Guinness World Records Day.
http://www.cnn.com/2014/11/13/living/tallest-shortest-man-guinness/index.html
Kosen, 31, is a part-time farmer who measures 8 feet, 3 inches tall and can reach a basketball hoop without jumping. He became the world's tallest living man in 2009, overtaking China's Xi Shun, who stood a mere 7 feet 9 inches.
http://www.cnn.com/2014/11/13/living/tallest-shortest-man-guinness/index.html
The tallest living man officially measured by Guinness World Records (Guinness Book of Records) is Sultan Kosen from Turkey, with a height of 8 feet 3 inches (251.4 cm) tall. Sultan Kosen was last measured in February 2011 and found to still be growing.
http://www.thetallestman.com/
For the first time, the tallest recorded man in the world met the shortest man. Sultan Kosen, 31, is a Turkish farmer who measures 8 feet, 3 inches tall. Nepalese weaver Chandra Bahadur Dangi, 74, is just 21½ inches tall. The two men met in London for the 10th annual Guinness World Records Day.
http://www.cnn.com/2014/11/13/living/tallest-shortest-man-guinness/index.html
United States Alton, Illinois. When. 27 June 1940. The tallest man in medical history for whom there is irrefutable evidence is Robert Pershing Wadlow (USA) (born 6:30 a.m. at Alton, Illinois, USA on 22 February 1918), who when last measured on 27 June 1940, was found to be 2.72 m (8 ft 11.1 in) tall.
http://www.guinnessworldrecords.com/world-records/tallest-man-ever
This is a Chinese name; the family name is Bao. Bao Xishun (also known as Xi Shun; born 1951) is a herdsman from Inner Mongolia, China, recognized by Guinness World Records as one of the world's tallest living men.
https://en.wikipedia.org/wiki/Bao_Xishun
who is the tallest living person in the world?
Sultan Kösen is the tallest living person in the World. Sultan Kösen is the tallest living person in the world.