Hello how may I help you? Who's the world's tallest man? The tallest man to ever live was Robert Wadlow he was 8 feet 11 in Where is he from? Illinois They called him the Alton Giant because he was from Alton Illinois Is he alive now? Ah okay He died in 1940 at the age of 22 Why so early? His height caused circulatory problems It is said he was still growing when he died Oh that's little creepy He got a blister and it didn't heal right because of his circulatory problems Yes it's kind of sad actually Ah thanks for the info.