Hello how may I help you? Hi can you help with world record info? Of course! What would you like to know? Who is the Tallest Person in the world? Did you mean the tallest living person or the tallest person of all time? The tallest person of all time please. The tallest person of all time is Robert Pershing Wadlow. How tall was he? He was 8 feet and 11 inches tall. Wow, that is tall. Thanks for your help. Anytime!