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 currently The tallest living person is Sultan Kosen. How tall is he? He is 8 feet 2.8 inches tall. and how is the tallest person to ever live? The tallest person ever is Robert Pershing Wadlow. Okay, that is all for today, thanks You're welcome!