America

All The US Presidents, Ranked By IQ 

Lauren Slocum
Updated December 13, 2018 179.5k views 44 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.

1
John Quincy Adams is listed (or ranked) 1 on the list All The US Presidents, Ranked By IQ
Dec. at 81 (1767-1848)

Birthplace: Braintree, Massachusetts, United States of 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 ...more
2
Thomas Jefferson is listed (or ranked) 2 on the list All The US Presidents, Ranked By IQ
Dec. at 83 (1743-1826)

Birthplace: Shadwell, Virginia, United States of America

Presidency: 3

V.P.: Aaron Burr, George Clinton

Profession: Statesman, Inventor, Author, Farmer, Architect, + more

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 ...more
3
John F. Kennedy is listed (or ranked) 3 on the list All The US Presidents, Ranked By IQ
Dec. 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 ...more
4
Bill Clinton is listed (or ranked) 4 on the list All The US Presidents, Ranked By IQ
Age: 73

Birthplace: Hope, Arkansas, United States of America

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 ...more
5
Jimmy Carter is listed (or ranked) 5 on the list All The US Presidents, Ranked By IQ
Age: 95

Birthplace: Plains, Georgia, United States of America

Presidency: 39

V.P.: Walter Mondale

Profession: Statesman, Politician, Novelist, Military Officer, Author, + more

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 ...more
6
James Madison is listed (or ranked) 6 on the list All The US Presidents, Ranked By IQ
Dec. at 85 (1751-1836)

Birthplace: Port Conway, Virginia, USA

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 ...more
7
John Adams is listed (or ranked) 7 on the list All The US Presidents, Ranked By IQ
Dec. at 91 (1735-1826)

Birthplace: Braintree, Massachusetts, United States of America

Presidency: 2

V.P.: Thomas Jefferson

Profession: Politician, Lawyer

Alleged IQ: 155

John Adams Jr. (October 30, 1735 – July 4, 1826) was an American statesman, attorney, diplomat, writer, and Founding Father who served as the second president of the United States from 1797 to ...more
8
Barack Obama is listed (or ranked) 8 on the list All The US Presidents, Ranked By IQ
Age: 58

Birthplace: Honolulu, Hawaii, United States of America

Presidency: 44

V.P.: Joe Biden

Profession: Politician, Author, Law professor, Writer, Lawyer

Alleged IQ: 155

Barack Hussein Obama born August 4, 1961is an American attorney and politician who served as the 44th president of the United States from 2009 to 2017. A member of the Democratic Party, he was ...more
9
Franklin D. Roosevelt is listed (or ranked) 9 on the list All The US Presidents, Ranked By IQ
Dec. at 63 (1882-1945)

Birthplace: Hyde Park, New York, United States of America

Presidency: 32

V.P.: John Nance Garner, Henry A. Wallace, Harry S. Truman

Profession: Politician, Soldier, Corporate lawyer, Writer, Lawyer

Alleged IQ: 150

Franklin Delano Roosevelt (, ; January 30, 1882 – April 12, 1945), often referred to by initials FDR, was an American statesman and political leader who served as the 32nd president of the ...more
10
Millard Fillmore is listed (or ranked) 10 on the list All The US Presidents, Ranked By IQ
Dec. at 74 (1800-1874)

Birthplace: Summerhill, New York, United States of America

Presidency: 13

Profession: Politician, Lawyer

Alleged IQ: 149

Millard Fillmore (January 7, 1800 – March 8, 1874) was the 13th president of the United States (1850–1853), the last to be a member of the Whig Party while in the White House. A former U.S. ...more
11
Franklin Pierce is listed (or ranked) 11 on the list All The US Presidents, Ranked By IQ
Dec. at 65 (1804-1869)

Birthplace: Hillsborough, New Hampshire, United States of America

Presidency: 14

V.P.: William R. King

Profession: Politician, Lawyer

Alleged IQ: 147

Franklin Pierce (November 23, 1804 – October 8, 1869) was the 14th president of the United States (1853–1857), a northern Democrat who saw the abolitionist movement as a fundamental threat to ...more
12
Rutherford B. Hayes is listed (or ranked) 12 on the list All The US Presidents, Ranked By IQ
Dec. at 71 (1822-1893)

Birthplace: Delaware County, Ohio, Delaware, United States, with Territories

Presidency: 19

V.P.: William A. Wheeler

Profession: Politician, Lawyer

Alleged IQ: 146

Rutherford Birchard Hayes (October 4, 1822 – January 17, 1893) was the 19th president of the United States from 1877 to 1881, having served also as an American representative and governor of ...more
13
Woodrow Wilson is listed (or ranked) 13 on the list All The US Presidents, Ranked By IQ
Dec. at 68 (1856-1924)

Birthplace: Virginia, United States of America

Presidency: 28

V.P.: Thomas R. Marshall

Profession: Politician, Historian, Professor, Political scientist, Political Science, + more

Alleged IQ: 145.1

14
Benjamin Harrison is listed (or ranked) 14 on the list All The US Presidents, Ranked By IQ
Dec. at 68 (1833-1901)

Birthplace: North Bend, Ohio, United States of America

Presidency: 23

V.P.: Levi P. Morton

Profession: Politician, Lawyer

Alleged IQ: 145

Benjamin Harrison (August 20, 1833 – March 13, 1901) was an American politician and lawyer who served as the 23rd president of the United States from 1889 to 1893. He was a grandson of the ninth ...more
15
Andrew Jackson is listed (or ranked) 15 on the list All The US Presidents, Ranked By IQ
Dec. at 78 (1767-1845)

Birthplace: Waxhaws

Presidency: 7

V.P.: Martin Van Buren, John C. Calhoun

Profession: Prosecutor, Judge, Politician, Soldier, Farmer

Alleged IQ: 145

Andrew Jackson (March 15, 1767 – June 8, 1845) was an American soldier and statesman who served as the seventh president of the United States from 1829 to 1837. Before being elected to the ...more
16
Donald Trump is listed (or ranked) 16 on the list All The US Presidents, Ranked By IQ

Birthplace: New York City, New York, United States of America

Presidency: 45

V.P.: Mike Pence

Profession: Businessperson, Television producer, Investor, Entrepreneur, Real estate entrepreneur, + more

Alleged IQ: 145

Donald John Trump (born June 14, 1946) is the 45th and current president of the United States. Before entering politics, he was a businessman and television personality. Trump was born and ...more
17
Grover Cleveland is listed (or ranked) 17 on the list All The US Presidents, Ranked By IQ
Dec. at 71 (1837-1908)

Birthplace: Caldwell, New Jersey, United States of America

Presidency: 22, 24

V.P.: Adlai Stevenson I, Thomas A. Hendricks

Profession: Politician, Lawyer

Alleged IQ: 144

Stephen Grover Cleveland (March 18, 1837 – June 24, 1908) was an American politician and lawyer who was the 22nd and 24th president of the United States, the only president in American history ...more
18
Theodore Roosevelt is listed (or ranked) 18 on the list All The US Presidents, Ranked By IQ
Dec. at 61 (1858-1919)

Birthplace: Manhattan, New York City, New York, United States of America

Presidency: 26

V.P.: Charles W. Fairbanks

Profession: Statesman, Politician, Police officer, Historian, Conservationist, + more

Alleged IQ: 143

19
George H. W. Bush is listed (or ranked) 19 on the list All The US Presidents, Ranked By IQ
Age: 95

Birthplace: Eastern United States, Milton, New England, Norfolk County, United States of America, + more

Presidency: 41

V.P.: Dan Quayle

Profession: Businessperson, Politician, Entrepreneur, Military aviator

Alleged IQ: 143

George Herbert Walker Bush (June 12, 1924 – November 30, 2018) was an American politician and businessman who served as the 41st president of the United States from 1989 to 1993 and the 43rd ...more
20
Chester A. Arthur is listed (or ranked) 20 on the list All The US Presidents, Ranked By IQ
Dec. at 57 (1829-1886)

Birthplace: Fairfield, Vermont, United States of America

Presidency: 21

Profession: Politician, Lawyer, Teacher

Alleged IQ: 142

Chester Alan Arthur (October 5, 1829 – November 18, 1886) was an American attorney and politician who served as the 21st president of the United States from 1881 to 1885. He previously was the ...more
21
James A. Garfield is listed (or ranked) 21 on the list All The US Presidents, Ranked By IQ
Dec. at 50 (1831-1881)

Birthplace: Moreland Hills, Ohio, United States of America

Presidency: 20

V.P.: Chester A. Arthur

Profession: Laity, Politician, Lawyer, Teacher

Alleged IQ: 141.5

22
Abraham Lincoln is listed (or ranked) 22 on the list All The US Presidents, Ranked By IQ
Dec. at 56 (1809-1865)

Birthplace: Hodgenville, Kentucky, United States of America

Presidency: 16

V.P.: Andrew Johnson, Hannibal Hamlin

Profession: Statesman, Politician, Lawyer

Alleged IQ: 140

23
Lyndon B. Johnson is listed (or ranked) 23 on the list All The US Presidents, Ranked By IQ
Dec. at 65 (1908-1973)

Birthplace: Stonewall, Texas, United States of America

Presidency: 36

V.P.: Hubert Humphrey

Profession: Politician, Teacher

Alleged IQ: 140

Lyndon Baines Johnson (; August 27, 1908 – January 22, 1973), often referred to as LBJ, was an American politician who served as the 36th president of the United States from 1963 to 1969. ...more
24
George Washington is listed (or ranked) 24 on the list All The US Presidents, Ranked By IQ
Dec. at 67 (1732-1799)

Birthplace: Virginia, United States of America

Presidency: 1

V.P.: John Adams

Profession: Surveyor, Politician, Soldier, Military Officer, Farmer, + more

Alleged IQ: 140 

George Washington was the first President of the United States, the Commander-in-Chief of the Continental Army, and one of the Founding Fathers of the United States. He presided over the ...more
25
Gerald Ford is listed (or ranked) 25 on the list All The US Presidents, Ranked By IQ
Dec. at 93 (1913-2006)

Birthplace: Omaha, Nebraska, United States of America

Presidency: 38

V.P.: Nelson Rockefeller

Profession: Politician, American football player, Lawyer

Alleged IQ: 140

Gerald Rudolph Ford Jr. (born Leslie Lynch King Jr.; July 14, 1913 – December 26, 2006) was an American politician who served as the 38th president of the United States from August 1974 to ...more