Abraham Lincoln IQ

Abraham Lincoln never took an IQ test. Catharine Cox's 1926 study of 301 eminent people gave a corrected estimate of 150. Adjusted by about 22 points for the Flynn effect that is roughly 130. LifeScore lists 140+, so the working range is 130 to 150.

The 150 is Catharine Cox's corrected estimate from her 1926 study of 301 eminent people born between 1450 and 1850. She rated each person from biographical records of what they could do as a child and young adult, then corrected for gaps in the record.

Cox's numbers sit on an old ratio-IQ scale. One secondary tabulation subtracts about 22 points for the Flynn effect, which puts Abraham Lincoln near 130.

LifeScore lists 140+, and the working range of 130 to 150 spans both figures. None of them is a test result.

What supports it

• Catharine Cox's 1926 study of 301 eminent people gave Abraham Lincoln a corrected estimate of 150, based on records of childhood and youth.
• Adjusted by about 22 points for the Flynn effect, that figure falls to roughly 130.
• Documented achievement as a president of the united states is the other half of the evidence, and it is summarised in the profile below.

What it cannot prove

• Cox rated people from biographies, not tests, and her scale is not the modern deviation-IQ scale.
• Thin records pull estimates towards average, which is why Cox added a correction that itself adds uncertainty.
• Achievement reflects education, opportunity, persistence and collaboration as well as ability.

Abraham Lincoln's IQ is represented here by a retrospective estimate of 140+, not a verified test result. Abraham Lincoln is best known for exceptional resilience. The useful question is what the surviving evidence shows, not whether a precise modern score can be recovered.

High emotional stability despite chronic depression. Extraordinary verbal intelligence and ability to synthesize opposing views.

The dominant archetype here is The Statesman. This archetype shapes decision patterns: what feels natural, what creates friction, and what blind spots tend to emerge.

Estimated IQ is 140+. This is a rough estimate based on documented accomplishments and contemporary accounts, not a literal measurement.

The 19th Century created specific selection pressures that rewarded Abraham's profile. In a different era, the same traits might have produced different outcomes.

Lessons from Lincoln

• Abraham's greatest strength (Resilience and Rhetoric) was also their greatest liability when taken to extremes.
• The The Statesman archetype tends to succeed in environments that reward bold action and long-term vision, but struggles in environments that demand consensus-building.
• One pattern worth noting: Abraham's output was most productive when external constraints forced focus. Without structure, the same traits that enabled greatness sometimes led to overreach.

Abraham Lincoln's estimate of 140+ falls in the genius level IQ range. See what an IQ of 140 means, place it on the IQ chart or check how rare it is with the IQ rarity calculator.