Hello how may I help you? I would like to know who the tallest person in the world is. Do you mean the tallest living person or the tallest person of all time? The tallest living person please. The tallest living person in the world is Bao Xishun. Can you tell me how tall they are? His height is 2.36 m (7 ft 9 in). What country is he from? China. Do you know how old he is? He is between 66 to 67 years of age.