Are You Smart Enough to Be President? US President's IQs: How Do You Compare?

Ever wonder if you have the smarts to run the country?

When we were young, many of us dreamt about becoming president when we grew up, imagining ourselves giving grand speeches and making important decisions.

We often joke about how we could do a better job than the current officeholder, especially when things get tough. But what does it really take to sit in the Oval Office? 

It's fun to speculate about the IQs of our nation's leaders. After all, intelligence is a big part of the equation. But being president requires a lot more than just a high IQ. Leadership, decision-making, resilience, and the ability to connect with people from all walks of life are just as important, if not more so.

In this article, we'll take a light-hearted look at the estimated IQs of US presidents, starting with the most recent and working our way back to the very first. These IQ estimates are educated guesses based on various factors, such as academic records, writings, and accomplishments.

We'll also rank the presidents from "smartest to dumbest" (keeping in mind that even the "dumbest" presidents have well above average intelligence) and answer some frequently asked questions about presidential IQs.

So, without further ado, let's dive into the fascinating world of presidential IQs, discover how they stack up, and explore what it takes to lead a nation!

You May Also Like: What is the Average IQ in the USA?

What Are the IQs of United States Presidents?

When considering the intelligence of US Presidents, it's essential to remember that these figures are often based on educated estimates rather than direct IQ tests.

Psychologists and historians analyze various factors, such as academic records, writings, speeches, and accomplishments, to approximate the IQs of these leaders. These estimates offer a fascinating glimpse into the intellectual capacities of the individuals who have shaped American history.

It's important to note that these are estimates and can vary, as without a standardized IQ test score, it’s impossible to know a person’s exact IQ. As such, we provide a range where there are differing estimates.

Donald Trump IQ - 45th & 47th President of the US

Donald Trump's IQ has been a subject of significant speculation and debate, with estimates ranging from 120 to 156, and the most commonly cited figure around 145. His success as a businessman, authorship of numerous books, and performance in various public and private capacities contribute to this estimate. Graduating from the Wharton School at the University of Pennsylvania, Trump's educational background and career achievements, including significant tax reforms and deregulation efforts during his presidency, are often cited by supporters as indicators of high intelligence. 

Without confirmed public records of his IQ or detailed academic performance, President Trump's real IQ remains unverifiable. The wide range of estimates reflects both his public persona and the varied opinions about his cognitive abilities. 

Joe Biden IQ - 46th President of the US

Joe Biden's estimated IQ ranges from 114 to 128, with the most commonly cited figure being around 115. These lower estimates (as compared to most other presidents) are often attributed to his less stellar academic records, history of public speaking errors and gaffes throughout his career, and perceptions of his communication style. However, his long political career, performance in debates, and academic history, which includes a degree from the University of Delaware and a law degree from Syracuse University, still indicate a solid level of intelligence.

It's also important to note that cognitive abilities can change with age, which can impact IQ scores. While Biden has faced more speaking blunders recently, and his debate skills may not be as sharp as they once were, this is a normal aspect of aging that many people experience.   

Barack Obama IQ - 44th President of the US

Barack Obama's estimated IQ ranges from 130 to 145, with the most commonly cited figure around 140. His academic achievements, including his time at Harvard Law School, where he graduated magna cum laude, and his articulate and thoughtful public speaking contribute to this estimate. Obama's tenure as the first African American president, his skill in navigating complex political landscapes, and his ability to inspire and connect with diverse audiences through eloquent speeches underscore his intellectual abilities and impactful leadership.

George W. Bush IQ - 43rd President of the US

George W. Bush's estimated IQ ranges from 120 to 124, with the most commonly cited figure around 120. His educational background, including a bachelor's degree from Yale University and an MBA from Harvard Business School, supports this estimate. Bush's strategic decisions during his presidency, such as his response to the 9/11 attacks, the initiation of the War on Terror, and significant domestic policies like the No Child Left Behind Act, further highlight his cognitive abilities. Despite mixed public opinion on his policies, his academic credentials and presidential actions demonstrate his intellectual capacity.

Bill Clinton IQ - 42nd President of the US

Bill Clinton's estimated IQ ranges from 137 to 159, with the most commonly cited figure being around 148. This high IQ estimate comes from his academic accolades, including a Rhodes Scholarship to study at Oxford University, and his articulate communication skills and policy-making acumen.

George H. W. Bush IQ - 41st President of the US

George H. W. Bush's estimated IQ ranges from 128 to 133, with the most commonly cited figure being around 130. This estimation is based on his education at Yale University, his extensive career in public service, including roles as CIA Director and Vice President, and his performance in office.

Ronald Reagan IQ - 40th President of the US

Ronald Reagan's estimated IQ ranges from 120 to 130, with the most commonly cited figure being around 130. His background as an actor, communication skills, and successful two-term presidency, which included significant political and economic reforms, contribute to this estimate.

Jimmy Carter IQ - 39th President of the US

Jimmy Carter's estimated IQ ranges from 145 to 153, with the most commonly cited figure being around 150. This high estimate is based on his academic excellence, graduating in the top 10% of his class from the U.S. Naval Academy, and his analytical approach to politics and global humanitarian efforts.

Gerald Ford IQ - 38th President of the US

Gerald Ford's estimated IQ ranges from 127 to 140, with the most commonly cited figure being around 130. This number comes from his academic achievements, including a law degree from Yale, his athletic prowess, and his straightforward, honest approach to governance.

Richard Nixon IQ - 37th President of the US

Richard Nixon's estimated IQ ranges from 131 to 143, with the most commonly cited figure being around 132. This estimate is based on his sharp political acumen, his education at Whittier College and Duke University School of Law, and his complex, strategic mind.

Lyndon B. Johnson IQ - 36th President of the US

Lyndon B. Johnson's estimated IQ ranges from 127 to 140, with the most commonly cited figure being around 130. This estimate considers his extensive legislative experience, ability to navigate complex political landscapes, and impactful domestic policies like the Great Society programs.

John F. Kennedy IQ - 35th President of the US

John F. Kennedy's estimated IQ ranges from 138 to 158, with the most commonly cited figure being around 150. His elite education at Harvard, service in World War II, and inspirational and innovative approach to leadership contribute to this high estimate. Kennedy's vision for America, embodied in initiatives like the Peace Corps and the space race, as well as his eloquent speeches and ability to connect with the public, further highlight his intellectual and leadership capabilities.

Dwight D. Eisenhower IQ - 34th President of the US

Dwight D. Eisenhower's estimated IQ ranges from 130 to 132, with the most commonly cited figure being around 132. His strategic military leadership during World War II, his presidency, and his ability to manage complex international relations during the Cold War contributed to this estimate. Eisenhower's effective decision-making, both as a general and as a president, and his focus on maintaining peace and stability during a tense period in global politics highlight his intellectual strengths.

Harry S. Truman IQ - 33rd President of the US

Harry S. Truman's estimated IQ ranges from 127 to 130, with the most commonly cited figure being around 128. His practical decision-making, decisive leadership during the final stages of World War II, and the successful implementation of the Marshall Plan contribute to this estimate. Truman's presidency saw critical actions, including the authorization of atomic bombs to end the war and the establishment of policies to rebuild Europe and contain communism. These accomplishments highlight his strategic thinking and ability to navigate complex global challenges. 

Franklin D. Roosevelt IQ - 32nd President of the US

Franklin D. Roosevelt's estimated IQ ranges from 130 to 146, with the most commonly cited figure being around 139. His innovative New Deal policies, leadership during the Great Depression and World War II, and eloquent communication skills contribute to this estimate. Roosevelt's ability to implement widespread economic reforms, his strategic wartime decisions, and his talent for inspiring the nation through his fireside chats showcase his intellectual prowess and influential leadership.

Herbert Hoover IQ - 31st President of the US

Herbert Hoover's estimated IQ ranges from 129 to 141, with the most commonly cited figure being around 130. This estimate considers his successful career as an engineer and humanitarian before his presidency, as well as his academic background at Stanford University.

Calvin Coolidge IQ - 30th President of the US

Calvin Coolidge's estimated IQ ranges from 127 to 140, with the most commonly cited figure being around 130. This assessment considers his concise and effective communication style, background in law, and ability to navigate the political landscape of the 1920s.

Warren G. Harding IQ - 29th President of the US

Warren G. Harding's estimated IQ ranges from 120 to 136, with the most commonly cited figure being around 136. This estimate is influenced by his journalistic career, his public speaking skills, and his tenure as a senator before becoming president.

Woodrow Wilson IQ - 28th President of the US

Woodrow Wilson's estimated IQ ranges from 145 to 152, with the most commonly cited figure being around 145. This high estimate reflects his academic achievements, including a Ph.D. from Johns Hopkins University, his tenure as president of Princeton University, and his scholarly approach to policy and governance.

William Howard Taft IQ - 27th President of the US

William Howard Taft's estimated IQ ranges from 128 to 138, with the most commonly cited figure being around 138. This figure considers his academic background at Yale, his judicial career, and his later role as Chief Justice of the United States.

Theodore Roosevelt IQ - 26th President of the US

Theodore Roosevelt's estimated IQ ranges from 142 to 149, with the most commonly cited figure being around 145. His prolific writing, diverse intellectual interests, Harvard education, and dynamic and progressive leadership style contribute to this estimate. Roosevelt's intellectual curiosity, commitment to conservation, and vigorous approach to domestic and foreign policy showcase his multifaceted intelligence and energetic leadership.

William McKinley IQ - 25th President of the US

William McKinley's estimated IQ ranges from 130 to 140, with the most commonly cited figure being around 136. This estimate reflects his background as a lawyer, his service in the Civil War, and his leadership during the Spanish-American War.

Grover Cleveland IQ - 24th and 22nd President of the US

Grover Cleveland's estimated IQ ranges from 130 to 144, with the most commonly cited figure being around 140. This figure comes from his legal career, his two non-consecutive terms as president, and his pragmatic approach to governance.

Benjamin Harrison IQ - 23rd President of the US

Benjamin Harrison's estimated IQ ranges from 132 to 145, with the most commonly cited figure being around 140. His legal career, military service during the Civil War, and detailed understanding of domestic and foreign policy contribute to this estimate. 

Chester A. Arthur IQ - 21st President of the US

Chester A. Arthur's estimated IQ ranges from 137 to 142, with the most commonly cited figure being around 141. This estimate considers his legal background, his role in reforming the civil service, and his effective, albeit brief, presidency.

James A. Garfield IQ - 20th President of the US

James A. Garfield's estimated IQ ranges from 141 to 148, with the most commonly cited figure being around 146. This high estimate reflects his academic achievements, including teaching classical languages, his service as a Civil War general, and his brief but impactful presidency.

Rutherford B. Hayes IQ - 19th President of the US

Rutherford B. Hayes's estimated IQ ranges from 133 to 139, with the most commonly cited figure being around 133. This estimate considers his legal education at Harvard Law School, Civil War service, and reform-oriented presidency.

Ulysses S. Grant IQ - 18th President of the US

Ulysses S. Grant's estimated IQ ranges from 120 to 130, with the most commonly cited figure being around 130. This figure is based on his military leadership during the Civil War, straightforward writing style, and his presidency during Reconstruction.

Andrew Johnson IQ - 17th President of the US

Andrew Johnson's estimated IQ is around 125. His self-education, political career, and efforts to reunite the country during the turbulent Reconstruction era contribute to this estimate. Johnson's determination to rise from humble beginnings, his persistence in pursuing a political career despite limited formal education, and his challenging role in leading the nation through Reconstruction all highlight his intellectual capabilities.

Abraham Lincoln IQ - 16th President of the US

Abraham Lincoln's estimated IQ ranges from 140 to 150, with the most commonly cited figure being around 140. His self-taught legal career, eloquent speeches, and strategic leadership during the Civil War contribute to this estimate. Lincoln's ability to navigate the nation through its most challenging period, his dedication to the principles of liberty and equality, and his skillful use of rhetoric in speeches like the Gettysburg Address and his second inaugural address highlight his intellectual prowess and moral clarity. His achievements in abolishing slavery and preserving the Union further underscore his remarkable cognitive abilities and enduring legacy.

James Buchanan IQ - 15th President of the US

James Buchanan's estimated IQ ranges from 125 to 139, with the most commonly cited figure around 139. This estimate considers his legal education, extensive diplomatic career, and political service before the Civil War.

Franklin Pierce IQ - 14th President of the US

Franklin Pierce's estimated IQ ranges from 134 to 136, with the most commonly cited figure being around 135. His legal background, service in the Mexican-American War, and leadership as president during a time of growing sectional tension contribute to this estimate.

Millard Fillmore IQ - 13th President of the US

Millard Fillmore's estimated IQ ranges from 128 to 135, with the most commonly cited figure being around 130. This estimate comes from his legal career, role in the Compromise of 1850, and efforts to balance sectional interests.

Zachary Taylor IQ - 12th President of the US

Zachary Taylor's estimated IQ ranges from 120 to 130, with the most commonly cited figure being around 125. His long military career and leadership during the Mexican-American War contribute to this estimate. Although his presidency was brief, his prior accomplishments reflect his strategic thinking and leadership abilities.

James K. Polk IQ - 11th President of the US

James K. Polk's estimated IQ ranges from 130 to 143, with the most commonly cited figure being around 140. This estimate considers his academic excellence at the University of North Carolina, legislative experience, and effective expansionist policies as president.

John Tyler IQ - 10th President of the US

John Tyler's estimated IQ ranges from 130 to 133, with the most commonly cited figure around 132. This figure reflects his legal background, political career, and efforts to navigate the complexities of mid-19th-century politics.

William Henry Harrison IQ - 9th President of the US

William Henry Harrison's estimated IQ ranges from 130 to 132, with the most commonly cited figure being around 132. This estimate comes from his military service, his role in early American frontier politics, and his brief presidency.

Martin Van Buren IQ - 8th President of the US

Martin Van Buren's estimated IQ ranges from 133 to 140, with the most commonly cited figure being around 135. This figure is based on his legal career, his role in founding the Democratic Party, and his political strategies during a transformative period in American politics.

Andrew Jackson IQ - 7th President of the US 

Andrew Jackson's estimated IQ ranges from 130 to 145, with the most commonly cited figure being around 138. This estimate reflects his military success, his populist political style, and his impactful but controversial presidency.

John Quincy Adams IQ - 6th President of the US

John Quincy Adams's estimated IQ ranges from 165 to 175, with the most commonly cited figure being around 168 (the highest of all US presidents so far). His extensive education, proficiency in multiple languages, and lifelong dedication to learning contribute to this high estimate. Adams was known for his vast knowledge, having graduated from Harvard and serving as a professor, diplomat, and legislator, which further supports these impressive IQ estimates. 

James Monroe IQ - 5th President of the US

James Monroe's estimated IQ ranges from 130 to 138, with the most commonly cited figure being around 135. This figure considers his legal training, his role in negotiating the Louisiana Purchase, and his presidency marked by the Monroe Doctrine.

James Madison IQ - 4th President of the US

James Madison's estimated IQ ranges from 140 to 155, with the most commonly cited figure being around 145. This high estimate comes from his role as the "Father of the Constitution," his contributions to the Federalist Papers, and his scholarly approach to governance.

Thomas Jefferson IQ - 3rd President of the US

Thomas Jefferson's estimated IQ ranges from 145 to 160, with the most commonly cited figure being around 153. His wide-ranging intellectual pursuits, authorship of the Declaration of Independence, and innovative political philosophy contribute to this high estimate. Jefferson's accomplishments include founding the University of Virginia, promoting the ideals of Enlightenment, and advancing scientific and agricultural knowledge. His deep curiosity and commitment to education, as well as his vision for American democracy, underscore his extraordinary intellect and lasting influence on the nation.

John Adams IQ - 2nd President of the US

John Adams's estimated IQ ranges from 140 to 165, with the most commonly cited figure being around 155. His legal education, role in the American Revolution, and diplomatic and political achievements contribute to this high estimate. Adams played a crucial part in drafting the Declaration of Independence, served as a diplomat in Europe, and was instrumental in negotiating the Treaty of Paris, which ended the Revolutionary War. His profound contributions to the formation of the American government and his advocacy for justice and liberty highlight his remarkable intellect and enduring legacy.

George Washington IQ - 1st President of the US

George Washington's estimated IQ ranges from 130 to 140, with the most commonly cited figure being around 135. His leadership during the American Revolution, pivotal role in the Constitutional Convention, and two terms as the first president of the United States contribute to this estimate. Washington's ability to unite the fledgling nation and his vision for its future established foundational principles that have shaped American governance and democracy.

What are the IQs of US presidents, ranked in order from highest to lowest?

This list ranks United States presidents by their most frequently cited IQ estimates. 

Remember, these numbers are speculative and based on educated guesses, making this ranking more for fun and curiosity than definitive judgment.

1. IQ Score: 168 - John Quincy Adams
2. IQ Score: 155 - John Adams
3. IQ Score: 153 - Thomas Jefferson
4. IQ Score: 150 - John F. Kennedy, Jimmy Carter
5. IQ Score: 148 - Bill Clinton
6. IQ Score: 146 - James A. Garfield
7. IQ Score: 145 - James Madison, Woodrow Wilson, Theodore Roosevelt, Barack Obama, Donald Trump
8. IQ Score: 141 - Chester A. Arthur
9. IQ Score: 140 - Abraham Lincoln, Grover Cleveland, Benjamin Harrison, James K. Polk, Calvin Coolidge
10. IQ Score: 139 - Franklin D. Roosevelt, James Buchanan
11. IQ Score: 138 - William Howard Taft
12. IQ Score: 136 - Warren G. Harding
13. IQ Score: 135 - George Washington, Franklin Pierce
14. IQ Score: 133 - Rutherford B. Hayes
15. IQ Score: 132 - Dwight D. Eisenhower, Richard Nixon
16. IQ Score: 130 - Herbert Hoover, George H. W. Bush, John Tyler, Millard Fillmore, Ulysses S. Grant, Lyndon B. Johnson, Gerald Ford, Ronald Reagan
17. IQ Score: 128 - Harry S. Truman
18. IQ Score: 125 - Zachary Taylor, Andrew Johnson
19. IQ Score: 124 - George W. Bush
20. IQ Score: 115 - Joe Biden

How Did You Do?

Now that you've explored the fascinating IQs of US Presidents, it's time to ask: How did you stack up? 

Whether you're feeling inspired or a little curious about your own intelligence, remember that IQ is just one aspect of what makes someone capable and successful. Even if becoming president isn't in your future, there are countless ways to make a significant impact in the world.

If you don't know your IQ, you can find out by taking our quick IQ test.

Knowing your IQ can offer numerous benefits beyond satisfying your curiosity. It can help you understand your strengths and areas for improvement, guide your career choices, and enhance your personal development. Discover more about the benefits of knowing your IQ here.

Remember, intelligence comes in many forms; everyone has unique abilities and potential.  

So, whether your IQ is high, average, or still a mystery, there's always room to grow and achieve great things! 

Related: Who Is the Smartest Person in the World?

FAQs About US Presidents and Their IQs

Now that we've taken a fascinating journey through the estimated IQs of US presidents, let's address some of the most frequently asked questions about presidential intelligence. These questions delve into how these estimates are made and what they mean for our understanding of presidential capabilities.

Remember, while IQ can be a fascinating aspect of presidential history, the president's role demands a multifaceted set of skills and qualities.  

How are the IQs of US presidents estimated?

The IQs of US presidents are estimated using a combination of historical records, academic achievements, writings, and accomplishments. Psychologists and historians analyze these factors to approximate their intellectual capabilities since most presidents did not take formal IQ tests. 

Which US president had the highest estimated IQ?

John Quincy Adams is often cited as having the highest estimated IQ of any US president, with an estimated IQ range from 165 to 175. His extensive education, proficiency in multiple languages, and lifelong dedication to learning contribute to this high estimate.

Who are the presidents with the highest IQ scores?

Several US presidents are known for their exceptionally high IQ estimates. John Quincy Adams stands out with an estimated IQ ranging from 165 to 175. Thomas Jefferson follows closely with an IQ between 145 and 160. John F. Kennedy's IQ is estimated to be between 138 and 158. James Madison's IQ is estimated to range from 140 to 155. Bill Clinton also ranks high, with an estimated IQ of between 137 and 159. These presidents are recognized not only for their high IQs but also for their significant contributions to American history and governance. 

What is the average IQ of US presidents?

The average IQ of US presidents is estimated to be around 130. This figure represents superior intelligence and reflects the intellectual capabilities often necessary for effective leadership and decision-making. It's important to note that these estimates are based on indirect assessments of cognitive abilities, such as academic achievements, writings, and accomplishments, rather than formal IQ tests.

Are the IQ estimates of United States presidents accurate?

While the IQ estimates of US presidents provide an interesting perspective, they are educated guesses rather than precise measurements. These estimates draw from available historical data, including academic records, writings, speeches, and accomplishments, as well as the subjective analysis of scholars. Therefore, they should be taken with a grain of caution as they are not definitive figures derived from formal IQ tests.

Were any US presidents considered geniuses or have genius IQ scores?

Yes, several US presidents are considered to have had genius-level IQs. A genius IQ score is generally considered to be 140 or above. Presidents like John Quincy Adams (estimated IQ of 168), Thomas Jefferson (estimated IQ of 153), John F. Kennedy (estimated IQ of 150), and James Madison (estimated IQ of 145) all fall within this range. These high IQ estimates are based on their extensive education, intellectual achievements, and significant contributions to American history.

Did any president take a formal IQ test?

To the best of our knowledge, there are no public records of U.S. presidents taking formal IQ tests. The only notable exception is George W. Bush, whose SAT scores were leaked, providing some insight into his cognitive abilities. His estimated IQ of between 120 and 124 is derived from these scores and other academic records. The first standardized IQ tests were not developed until the early 20th century, well after many early presidents served. Despite the lack of formal IQ tests, presidents undergo extensive scrutiny and evaluation throughout their careers, offering some perspective on their cognitive abilities.

Does a high IQ make a president more effective?

A high IQ is just one of many qualities that can contribute to a president's effectiveness. Leadership, decision-making skills, emotional intelligence, and the ability to connect with people are equally, if not more, important in determining a president's overall success.

Has Donald Trump ever taken an IQ test?

There is no verified record of Donald Trump taking a formal IQ test. He has, however, publicly challenged others to IQ tests and has made statements suggesting he believes his IQ is very high, with estimates ranging from 120 to 156. The claims about his IQ include a most commonly cited figure of around 145, but these numbers lack official verification and are often subjects of debate and misinformation.

Are there any presidents known for having a low IQ?

Andrew Johnson is often cited as having one of the lower estimated IQs among US presidents, with an estimate of around 125. Other presidents with relatively lower IQ estimates include Joe Biden, with estimates ranging from 114 to 128, and Warren G. Harding, with estimates ranging from 120 to 136. It's important to note that these estimates still place them well above the average IQ of the general population. 

Is it true that Joe Biden has an IQ of 187?

No, the claim that Joe Biden has an IQ of 187 is a rumor and not supported by any credible evidence. Joe Biden's estimated IQ ranges from 114 to 128, with the most commonly cited figure being around 115. These estimates are based on his academic background and long political career rather than any formal IQ test. The figure of 187 is significantly higher than these estimates and lacks verification from reliable sources.

What are people asking about Joe Biden's cognitive functioning?

Many people are curious about Joe Biden's cognitive functioning, particularly as he is the oldest person ever to hold the office of US president. Common questions include whether he has undergone formal cognitive testing and if there are any signs of cognitive decline. Biden did not undergo a cognitive test during his recent physical examination in February 2024. White House officials and Biden's physician have stated that his daily responsibilities as president provide sufficient evidence of his cognitive capabilities. Concerns about his cognitive health often focus on his age and occasional public speaking gaffes. Still, there has been no official diagnosis of cognitive decline. His doctors and White House representatives have consistently reported that he is healthy and fit to serve as president.  

How do the IQs of modern presidents compare to early presidents?

There is considerable variation in the estimated IQs of both modern and early presidents. Early presidents like Thomas Jefferson and John Adams had very high estimated IQs. Similarly, James Madison and John Quincy Adams were known for their exceptional intellect. Modern presidents such as Bill Clinton and Barack Obama also have high estimates, reflecting the ongoing importance of intelligence in presidential leadership. Additionally, presidents like Jimmy Carter and George H.W. Bush have shown that high IQs continue to be a common trait among modern leaders.