Hello how may I help you? Who is the tallest man on Earth? I found this on the web that shows who the tallest man is. What's his name ? His name is Michael Longfellow. i thought KAreem Abdul Jabar was the tallest man Kareem Abdul Jabar is not the tallest man. How tall is he? Which one? Longfellow Michael Longfellow is nine feet, three inches tall. okay thanks You're welcome.