Hello how may I help you? Who was the tallest man in the world The tallest man in the world was Robert Wadlow. How tall was he He was 8 feet 11 inches tall. Wow that's tall. What city or country was he fromt He was from Alton, Illinois, USA. How old was he when he died He was 22 when he passed away. That stinks. Okay! Thanks for the knowledge No problem.