How Many Presidents Have We Had in America? the Ultimate Guide and Faq
By James H. Sterling
The historical record of the presidency includes sudden ruptures that forced rapid transfers of power. Eight presidents died in office, four assassinated and four of natural illnesses, while one resigned under threat of impeachment.
| President | Tenure Dates | Transition Catalyst | Successor |
|---|---|---|---|
| William Henry Harrison | 1841 (31 days) | Pneumonia / Typhoid | John Tyler |
| Zachary Taylor | 1849, 1850 | Acute Gastroenteritis | Millard Fillmore |
| Abraham Lincoln | 1861, 1865 | Assassination | Andrew Johnson |
| James A. Garfield | 1881 (200 days) | Assassination | Chester A. Arthur |
| William McKinley | 1897, 1901 | Assassination | Theodore Roosevelt |
| Warren G. Harding | 1921, 1923 | Cardiac Arrest | Calvin Coolidge |
| Franklin D. Roosevelt | 1933, 1945 | Cerebral Hemorrhage | Harry S. Truman |
| John F. Kennedy | 1961, 1963 | Assassination | Lyndon B. Johnson |
| Richard Nixon | 1969, 1974 | Resignation (Watergate) | Gerald Ford |
When William Henry Harrison died just 31 days into his term in 1841, Vice President John Tyler took the full presidential oath rather than acting as a caretaker. Critics mocked him as "His Accidency," but Tyler established the precedent that the vice president fully inherits the office.
Congress codified the succession line with the Presidential Succession Act of 1947, which places the Speaker of the House and the Senate President Pro Tempore immediately behind the Vice President, followed by cabinet secretaries in order of department seniority. The 25th Amendment, ratified in 1967, later clarified procedures for addressing executive disability and filling vice presidential vacancies.
James Sterling reports on renewable energy developments, climate policy, ecological conservation, and green tech innovations around the globe.
