There is no credible, documented IQ score for Adolf Hitler because he never took a standardized modern IQ test that was recorded in historical archives. Any specific number you see online claiming his IQ was 120, 140, or 141 is an invention or an unverified estimate, not a historical fact. During World War II, the United States Office of Strategic Services commissioned psychological profiles of Hitler by psychiatrists Walter C. Langer and Henry A. Murray to try to predict his behavior, but those profiles focused on personality traits, motivations, and mental health, and did not include IQ testing or scores. Historians who have studied his life note that Hitler had an exceptional memory for detail, especially military data, weapon specifications, and historical facts, and he possessed strong verbal intelligence and powers of persuasion as a public speaker. At the same time, he had limited formal education, left school at age 16, failed the entrance exam for art school twice, and showed poor understanding of economics, grand strategy, and logistics, especially later in the war. Psychological historians generally describe him as having above average intelligence in certain domains combined with severe personality disturbances, but assigning a precise IQ number is not possible and not historically meaningful.
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