Hello how may I help you? Hi. I am interested in some world records. Ok I can help with that Who is the tallest person in the world? the tallest person is Robert Wadlow How tall is he? do you mean the tallest person ever or the tallest living person? Both, actually. Robert Wadlow 8 ft 2.8 in tall and he lived from (February 22, 1918 July 15, 1940) and theSultan Ksen (Turkey, b.10 December 1982) who measured 251 cm (8 ft 2.8 in) in Ankara, Turkey, on 08 February 2011. Wow! That is really something! Thank you. your welcome