Hello how may I help you? Who's the tallest person the in world? The tallest person living now or who ever lived? Both please. Who ever lived was Tally McTreeson at 9'5" Wow. And the the tallest living person? George Smith in Idaho at 8'6" Wow. Thanks for the info! Yeah, I know. Anything else? That's all for now. Thanks for your help. You're welcome!