All The US Presidents, Ranked By IQ
Updated September 23, 2021 440.1K views44 items
An intelligence quotient test (IQ test) is a series of standardized tests used to gauge and assess a person's intelligence. While most people will never take a formal IQ test, high IQs have nevertheless always been a topic of public interest.
In recent history, US president IQs have been the subject of debate and discussion. This is in part due to Donald Trump's perpetual tweeting about his high IQ during the controversial election cycle of 2016. This led people to wonder who the smartest and dumbest presidents were throughout history.
A president's IQ is rarely made public, and many United States presidents were born before the modern IQ test was invented. Nevertheless, many psychological studies have provided educated guesses of presidential IQ based on a variety of factors. When it comes to IQ scores, a score over 140 is considered genius level.
Research indicates most presidents fall somewhere around 130, but that doesn't mean America has never had a genius in the Oval Office. There are outliers on either side, with many presidents' IQs being higher or lower than average. If you're curious to learn where our presidents rank in terms of intellectual prowess, browse the list below.
Ranked by
- 1Dec. at 80 (1767-1848)
- Birthplace: Braintree, Massachusetts Bay, British America
- Presidency: 6
- V.P.: John C. Calhoun
- Profession: Politician, Diplomat, Attorney at law, Lawyer
Alleged IQ: 175
John Quincy Adams ( (listen); July 11, 1767 – February 23, 1848) was an American statesman, diplomat, lawyer, and diarist who served as the sixth president of the United States from 1825 to 1829. He previously served as the eighth United States Secretary of State from 1817 to 1825. During his long diplomatic and political career, Adams also served as an ambassador, and represented Massachusetts as a United States Senator and as a member of the United States House of Representatives. He was the eldest son of John Adams, who served as the second US president from 1797 to 1801, and First Lady Abigail Adams. Initially a Federalist like his father, he won election to the presidency as a member of the Democratic-Republican Party, and in the mid-1830s became affiliated with the Whig Party. Born in Braintree, Massachusetts, Adams spent much of his youth in Europe, where his father served as a diplomat. After returning to the United States, Adams established a successful legal practice in Boston. In 1794, President George Washington appointed Adams as the U.S. ambassador to the Netherlands, and Adams would serve in high-ranking diplomatic posts until 1801, when Thomas Jefferson took office as president. Federalist leaders in Massachusetts arranged for Adams's election to the United States Senate in 1802, but Adams broke with the Federalist Party over foreign policy and was denied re-election. In 1809, Adams was appointed as the U.S. ambassador to Russia by President James Madison, a member of the Democratic-Republican Party. Adams held diplomatic posts for the duration of Madison's presidency, and he served as part of the American delegation that negotiated an end to the War of 1812. In 1817, newly-elected President James Monroe selected Adams as his Secretary of State. In that role, Adams negotiated the Adams–Onís Treaty, which provided for the American acquisition of Florida. He also helped formulate the Monroe Doctrine, which became a key tenet of U.S. foreign policy. The 1824 presidential election was contested by Adams, Andrew Jackson, William H. Crawford, and Henry Clay, all of whom were members of the Democratic-Republican Party. As no candidate won a majority of the electoral vote, the House of Representatives held a contingent election to determine the president, and Adams won that contingent election with the support of Clay. As president, Adams called for an ambitious agenda that included federally-funded infrastructure projects, the establishment of a national university, and engagement with the countries of Latin America, but many of his initiatives were defeated in Congress. During Adams's presidency, the Democratic-Republican Party polarized into two major camps: one group, known as the National Republican Party, supported President Adams, while the other group, known as the Democratic Party, was led by Andrew Jackson. The Democrats proved to be more effective political organizers than Adams and his National Republican supporters, and Jackson decisively defeated Adams in the 1828 presidential election. Rather than retiring from public service, Adams won election to the House of Representatives, where he would serve from 1831 to his death in 1848. He joined the Anti-Masonic Party in the early 1830s before becoming a member of the Whig Party, which united those opposed to President Jackson. During his time in Congress, Adams became increasingly critical of slavery and of the Southern leaders whom he believed controlled the Democratic Party. He was particularly opposed to the annexation of Texas and the Mexican–American War, which he saw as a war to extend slavery. He also led the repeal of the "gag rule," which had prevented the House of Representatives from debating petitions to abolish slavery. Historians generally concur that Adams was one of the greatest diplomats and secretaries of state in American history, but they tend to rank him as an above-average president. - 2Dec. at 83 (1743-1826)
- Birthplace: Shadwell, Colony of Virginia, British America
- Presidency: 3
- V.P.: Aaron Burr, George Clinton
- Profession: Statesman, Inventor, Author, Farmer, Architect
Alleged IQ: 160
Thomas Jefferson was an American Founding Father, the principal author of the Declaration of Independence, and the third President of the United States. He was a spokesman for democracy, and embraced the principles of republicanism and the rights of the individual with worldwide influence. At the beginning of the American Revolution, he served in the Continental Congress, representing Virginia, and then served as a wartime Governor of Virginia. In May 1785, he became the United States Minister to France and later the first United States Secretary of State serving under President George Washington. In opposition to Alexander Hamilton's Federalism, Jefferson and his close friend, James Madison, organized the Democratic-Republican Party, and later resigned from Washington's cabinet. Elected Vice President in 1796 in the administration of John Adams, Jefferson opposed Adams, and with Madison secretly wrote the Kentucky and Virginia Resolutions, which attempted to nullify the Alien and Sedition Acts. - 3Dec. at 46 (1917-1963)
- Birthplace: Brookline, Massachusetts, United States of America
- Presidency: 35
- V.P.: Lyndon B. Johnson
- Profession: Politician, Military Officer, Author, Writer
Alleged IQ: 160
John Fitzgerald Kennedy (May 29, 1917 – November 22, 1963), often referred to by initials JFK and Jack, was an American politician who served as the 35th president of the United States from January 1961 until his assassination in November 1963. Kennedy served at the height of the Cold War, and the majority of his work as president dealt with managing relations with the Soviet Union and Cuba. A Democrat, Kennedy represented Massachusetts in the U.S. House of Representatives and Senate prior to becoming president. Kennedy was born in Brookline, Massachusetts, and graduated from Harvard University in 1940, before joining the U.S. Naval Reserve the following year. During World War II, he commanded a series of PT boats in the Pacific theater and earned the Navy and Marine Corps Medal for his service. After the war, Kennedy represented the 11th congressional district of Massachusetts in the U.S. House of Representatives from 1947 to 1953. He was subsequently elected to the U.S. Senate and served as the junior Senator from Massachusetts from 1953 to 1960. While in the Senate, Kennedy published his book Profiles in Courage, which won a Pulitzer Prize for Biography. In the 1960 presidential election, he narrowly defeated Republican opponent Richard Nixon, who was the incumbent vice president. Kennedy's administration included high tensions with communist states in the Cold War. He increased the number of American military advisers in South Vietnam. In April 1961, he authorized a vain attempt to overthrow the Cuban government of Fidel Castro in the Bay of Pigs Invasion. Kennedy authorized the Cuban Project in November 1961. He rejected Operation Northwoods (plans for false flag attacks to gain approval for a war against Cuba) in March 1962, however his administration continued to plan for an invasion of Cuba in the summer of 1962. In October 1962, U.S. spy planes discovered Soviet missile bases had been deployed in Cuba; the resulting period of tensions, termed the Cuban Missile Crisis, nearly resulted in the breakout of a global thermonuclear conflict. Domestically, Kennedy presided over the establishment of the Peace Corps and the continuation of the Apollo space program, and supported the Civil Rights Movement, but was only somewhat successful in passing his New Frontier domestic policies. On November 22, 1963, he was assassinated in Dallas, Texas. Vice President Lyndon B. Johnson assumed the presidency upon Kennedy's death. Marxist Lee Harvey Oswald was arrested for the state crime, but he was shot to death by Jack Ruby two days later. The FBI and the Warren Commission both concluded Oswald had acted alone in the assassination, but various groups contested the Warren Report and believed that Kennedy was the victim of a conspiracy. After Kennedy's death, Congress enacted many of his proposals, including the Civil Rights Act and the Revenue Act of 1964. Kennedy ranks highly in polls of U.S. presidents with historians and the general public. His personal life has also been the focus of considerable interest, following revelations of his chronic health ailments and extramarital affairs. - 4Age: 77
- Birthplace: Hope, Arkansas, USA
- Presidency: 42
- V.P.: Al Gore
- Profession: Statesman, Politician, Author, Lawyer, Teacher
Alleged IQ: 159
William Jefferson Clinton (born William Jefferson Blythe III; August 19, 1946) is an American politician who served as the 42nd president of the United States from 1993 to 2001. Prior to the presidency, he was the governor of Arkansas from 1979 to 1981, and again from 1983 to 1992, and the attorney general of Arkansas from 1977 to 1979. A member of the Democratic Party, Clinton was ideologically a New Democrat, and many of his policies reflected a centrist "Third Way" political philosophy. Clinton was born and raised in Arkansas and attended Georgetown University, University College, Oxford, and Yale Law School. He met Hillary Rodham at Yale and married her in 1975. After graduating, Clinton returned to Arkansas and won election as the Attorney General of Arkansas, serving from 1977 to 1979. As Governor of Arkansas, he overhauled the state's education system and served as chairman of the National Governors Association. Clinton was elected president in 1992, defeating incumbent Republican opponent George H. W. Bush. At age 46, he became the third-youngest president and the first from the Baby Boomer generation. Clinton presided over the longest period of peacetime economic expansion in American history. He signed into law the North American Free Trade Agreement but failed to pass his plan for national health care reform. In the 1994 elections, the Republican Party won unified control of the Congress for the first time in 40 years. In 1996, Clinton became the first Democrat since Franklin D. Roosevelt to be elected to a second full term. He passed welfare reform and the State Children's Health Insurance Program, as well as financial deregulation measures, including the Gramm–Leach–Bliley Act and the Commodity Futures Modernization Act of 2000. In 1998, Clinton was impeached by the House of Representatives for perjury and obstruction of justice following allegations that he committed perjury and obstructed justice to conceal an affair that he had with Monica Lewinsky, a 22-year old White House Intern. Clinton was acquitted by the Senate in 1999 and completed his term in office. He is only the second U.S. president—following Andrew Johnson 131 years earlier—to ever be impeached. During the last three years of Clinton's presidency, the Congressional Budget Office reported a budget surplus, the first such surplus since 1969. In foreign policy, Clinton ordered U.S. military intervention in the Bosnian and Kosovo wars, signed the Iraq Liberation Act in opposition to Saddam Hussein, participated in the 2000 Camp David Summit to advance the Israeli–Palestinian peace process, and assisted the Northern Ireland peace process. Clinton left office with the highest end-of-office approval rating of any U.S. president since World War II, and has continually scored high in the historical rankings of U.S. presidents, consistently placing in the top third. Since leaving office, he has been involved in public speaking and humanitarian work. He created the William J. Clinton Foundation to address international causes such as the prevention of AIDS and global warming. He has remained active in politics by campaigning for Democratic candidates, including the presidential campaigns of his wife and Barack Obama. In 2004, Clinton published his autobiography, My Life. In 2009, he was named the United Nations Special Envoy to Haiti and after the 2010 Haiti earthquake, he teamed with George W. Bush to form the Clinton Bush Haiti Fund. In addition, he secured the release of two American journalists imprisoned by North Korea, visiting the capital Pyongyang and negotiating their release with then-North Korean leader Kim Jong-il. - 5Age: 99
- Birthplace: Plains, Georgia, United States of America
- Presidency: 39
- V.P.: Walter Mondale
- Profession: Statesman, Politician, Novelist, Military Officer, Author
Alleged IQ: 156.8
James Earl Carter Jr. (born October 1, 1924) is an American politician and philanthropist who served as the 39th president of the United States from 1977 to 1981. A member of the Democratic Party, he previously served as a Georgia State Senator from 1963 to 1967 and as the 76th Governor of Georgia from 1971 to 1975. After his presidency, Carter has remained active in the private sector; in 2002, he was awarded the Nobel Peace Prize for his work in co-founding the Carter Center. Raised in Plains, Georgia, Carter graduated from the United States Naval Academy in 1946 with a Bachelor of Science degree and joined the United States Navy, where he served on submarines. After the death of his father in 1953, Carter left his naval career and returned home to Georgia to take up the reins of his family's peanut-growing business. Carter inherited comparatively little due to his father's forgiveness of debts and the division of the estate among the children. Nevertheless, his ambition to expand and grow the Carters' peanut business was fulfilled. During this period, Carter was motivated to oppose the political climate of racial segregation and support the growing civil rights movement. He became an activist within the Democratic Party. From 1963 to 1967, Carter served in the Georgia State Senate, and in 1970, he was elected as Governor of Georgia, defeating former Governor Carl Sanders in the Democratic primary on an anti-segregation platform advocating affirmative action for ethnic minorities. Carter remained as governor until 1975. Despite being a dark-horse candidate who was little known outside of Georgia at the start of the campaign, Carter won the 1976 Democratic presidential nomination. In the general election, Carter ran as an outsider and narrowly defeated incumbent Republican President Gerald Ford. An evangelical Christian, Carter is credited with significantly moving the faith closer to the American mainstream; him advertising his devout Christian faith as a qualification on the campaign trail was unprecedented at the time and is seen as a significant event in the rise of the Christian right in America, even though they and Carter were political opponents.On his second day in office, Carter pardoned all the Vietnam War draft evaders. During Carter's term as president, two new cabinet-level departments, the Department of Energy and the Department of Education, were established. He established a national energy policy that included conservation, price control, and new technology. In foreign affairs, Carter pursued the Camp David Accords, the Panama Canal Treaties, the second round of Strategic Arms Limitation Talks (SALT II), and the return of the Panama Canal Zone to Panama. On the economic front, he confronted persistent stagflation, a combination of high inflation, high unemployment and slow growth. The end of his presidential tenure was marked by the 1979–1981 Iran hostage crisis, the 1979 energy crisis, the Three Mile Island nuclear accident, and the Soviet invasion of Afghanistan. In response to the invasion, Carter escalated the Cold War when he ended détente, imposed a grain embargo against the Soviets, enunciated the Carter Doctrine, and led an 1980 Summer Olympics boycott in Moscow. In 1980, Carter faced a challenge from Senator Ted Kennedy in the primaries, but he won re-nomination at the 1980 Democratic National Convention. Carter lost the general election to Republican nominee Ronald Reagan in an electoral landslide. Polls of historians and political scientists usually rank Carter as an average president; he often receives more positive evaluations for his post-presidential work. In 2012, Carter surpassed Herbert Hoover as the longest-retired president in U.S. history, in 2017 became the first president to live to the 40th anniversary of his inauguration and in 2019 became the longest-lived president; He is currently the oldest and earliest-serving of all living U.S. presidents. In 1982, he established the Carter Center to promote and expand human rights. He has traveled extensively to conduct peace negotiations, monitor elections, and advance disease prevention and eradication in developing nations. Carter is considered a key figure in the Habitat for Humanity charity. He has written over 30 books ranging from political memoirs to poetry while continuing to actively comment on ongoing American and global affairs, such as the Israeli-Palestinian conflict. - 6Dec. at 85 (1751-1836)
- Birthplace: Port Conway, Colony of Virginia, British America
- Presidency: 4
- V.P.: Elbridge Gerry, George Clinton
- Profession: Politician, Author, Lawyer
Alleged IQ: 155
James Madison Jr. (March 16, 1751 – June 28, 1836) was an American statesman, lawyer, diplomat, philosopher, and Founding Father who served as the fourth president of the United States from 1809 to 1817. He is hailed as the "Father of the Constitution" for his pivotal role in drafting and promoting the Constitution of the United States and the United States Bill of Rights. He also co-wrote The Federalist Papers, co-founded the Democratic-Republican Party, and served as the fifth United States secretary of State from 1801 to 1809. Born into a prominent Virginia planter family, Madison served as a member of the Virginia House of Delegates and the Continental Congress during and after the American Revolutionary War. He became dissatisfied with the weak national government established by the Articles of Confederation and helped organize the Constitutional Convention, which produced a new constitution to supplant the Articles of Confederation. Madison's Virginia Plan served as the basis for the Constitutional Convention's deliberations, and he was one of the most influential individuals at the convention. Madison became one of the leaders in the movement to ratify the Constitution, and he joined with Alexander Hamilton and John Jay in writing The Federalist Papers, a series of pro-ratification essays that is widely considered to be one of the most influential works of political science in American history. After the ratification of the Constitution, Madison emerged as an important leader in the United States House of Representatives and served as a close adviser to President George Washington. He was the main force behind the ratification of the United States Bill of Rights, which enshrines guarantees of personal freedoms and rights within the Constitution. During the early 1790s, Madison came to oppose the economic program and accompanying centralization of power favored by Secretary of the Treasury Alexander Hamilton. Along with Thomas Jefferson, Madison organized the Democratic-Republican Party, which was, alongside Hamilton's Federalist Party, one of the nation's first major political parties. After Jefferson won the 1800 presidential election, Madison served as secretary of State from 1801 to 1809. In that position, he supervised the Louisiana Purchase, which doubled the size of the United States. Madison succeeded Jefferson with a victory in the 1808 presidential election. After diplomatic protests and a trade embargo failed to end British attacks against American shipping, he led the United States into the War of 1812. The war was an administrative morass and ended inconclusively, but many Americans saw it as a successful "second war of independence" against Britain. The war convinced Madison of the necessity of a stronger federal government, and he presided over the creation of the Second Bank of the United States and the enactment of the protective Tariff of 1816. He retired from public office in 1817 and died in 1836. Madison is considered to be one of the most important Founding Fathers of the United States, and historians have generally ranked him as an above-average president.
