U.S. presidential history statistics
U.S. presidential history is a long run of fixed dates, repeated names, and a few structural facts that make the office easier to read as data than as a simple list of biographies.
From George Washington’s first term beginning on April 30, 1789, to Donald Trump’s current term beginning on January 20, 2025, the timeline spans more than two centuries of continuous succession (U.S. National Archives, “US Presidents in the Census Records”). The same source also shows how short some presidencies were, how long others lasted, and how the supporting presidential records system has grown into a huge archival network.
Table of contents
- Presidential timeline at a glance
- How the dates shape the office
- The shortest and longest terms in the record
- What the presidential libraries preserve
- Why the White House numbers matter
- Quick comparison table
- Reading the history as a dataset
Presidential timeline at a glance
The basic presidential sequence is one of the most familiar datasets in U.S. history, but the dates still reveal useful patterns when viewed carefully.
- George Washington served from April 30, 1789 to March 4, 1797 (U.S. National Archives, “US Presidents in the Census Records”).
- John Adams served from March 4, 1797 to March 4, 1801 (U.S. National Archives, “US Presidents in the Census Records”).
- Thomas Jefferson served from March 4, 1801 to March 4, 1809 (U.S. National Archives, “US Presidents in the Census Records”).
- James Madison served from March 4, 1809 to March 4, 1817 (U.S. National Archives, “US Presidents in the Census Records”).
- James Monroe served from March 4, 1817 to March 4, 1825 (U.S. National Archives, “US Presidents in the Census Records”).
The same pattern continues through the 19th and 20th centuries, with the official record preserving exact service dates for every president listed in the source dataset (U.S. National Archives, “US Presidents in the Census Records”). Those dates are useful because they let you compare administrations without relying on memory or broad historical eras.
Fast facts
- The presidential sequence in the source includes 47 numbered presidencies and a repeated name where a former president returned to office, showing the value of tracking office terms rather than just names (U.S. National Archives, “US Presidents in the Census Records”).
- Joe Biden’s term is listed from January 20, 2021 to January 20, 2025, and Donald Trump’s current term begins on January 20, 2025 (U.S. National Archives, “US Presidents in the Census Records”).
- William Henry Harrison’s term lasted from March 4, 1841 to April 4, 1841, which is one of the most compressed entries in the sequence (U.S. National Archives, “US Presidents in the Census Records”).
- Franklin D. Roosevelt’s term ran from March 4, 1933 to April 12, 1945, making it one of the longest continuous spans in the list (U.S. National Archives, “US Presidents in the Census Records”).
How the dates shape the office
The service dates show a presidency that has been both stable and historically changing. The office itself stays the same, but the calendar boundaries tell you where transitions, interruptions, and unusually short terms fit into the larger arc.
A few features stand out from the data:
- Early presidents often served the standard four-year span, such as John Adams, Thomas Jefferson, James Madison, and James Monroe, each listed with dates that match two full terms or one full term in the source record (U.S. National Archives, “US Presidents in the Census Records”).
- Several presidents served exactly one four-year term, including James K. Polk, Franklin Pierce, James Buchanan, Rutherford B. Hayes, Benjamin Harrison, William Howard Taft, Calvin Coolidge, Herbert Hoover, Dwight D. Eisenhower, John F. Kennedy, Gerald R. Ford, Jimmy Carter, Ronald Reagan, George H. W. Bush, Bill Clinton, George W. Bush, Barack Obama, and Donald Trump in his first term (U.S. National Archives, “US Presidents in the Census Records”).
- Some presidencies were cut short by death or resignation, which creates obvious date outliers in the sequence, such as William Henry Harrison, Zachary Taylor, Abraham Lincoln, James A. Garfield, Warren G. Harding, Franklin D. Roosevelt, Harry S. Truman’s transition dates, and Richard Nixon’s end date in 1974 (U.S. National Archives, “US Presidents in the Census Records”).
The date structure also makes the source especially useful for timeline comparisons. Instead of asking who served during a given decade, you can read exact start and end dates and see how much of a decade each presidency actually occupied.
The office is continuous, but the terms are not all equal in length. The dates make that difference visible immediately (U.S. National Archives, “US Presidents in the Census Records”).
Short term patterns
Short terms cluster around specific historical breaks. The source data shows William Henry Harrison serving from March 4, 1841 to April 4, 1841, Zachary Taylor from March 4, 1849 to July 9, 1850, Abraham Lincoln from March 4, 1861 to April 15, 1865, James A. Garfield from March 4, 1881 to Sept. 19, 1881, and Warren G. Harding from March 4, 1921 to August 2, 1923 (U.S. National Archives, “US Presidents in the Census Records”).
These entries matter because they break the assumption that each presidency is a neat four-year unit. The dataset is not just a list of names; it is also a record of disruptions, succession, and continuity.
The shortest and longest terms in the record
The shortest term in the source is William Henry Harrison’s presidency, which ran for only about one month, from March 4, 1841 to April 4, 1841 (U.S. National Archives, “US Presidents in the Census Records”). That makes it the most extreme outlier among the listed presidencies.
On the opposite end, Franklin D. Roosevelt’s presidency spans from March 4, 1933 to April 12, 1945 (U.S. National Archives, “US Presidents in the Census Records”). His term is the clearest example in the source of a long multi-term presidency that extends far beyond the standard four-year window.
Other long-serving entries include Ulysses S. Grant from March 4, 1869 to March 4, 1877, Theodore Roosevelt from Sept. 14, 1901 to March 4, 1909, Woodrow Wilson from March 4, 1913 to March 4, 1921, and Ronald Reagan from January 20, 1981 to January 20, 1989 (U.S. National Archives, “US Presidents in the Census Records”).
What the outliers tell you
The outliers are not just interesting trivia. They shape how the full record should be read.
- Very short terms usually signal interruption, not a different office structure.
- Very long terms usually signal repeated reelection or a historical context that extended one administration across multiple election cycles.
- The standard four-year pattern remains the dominant baseline, which makes the exceptions especially informative.
In other words, the statistics are less about a simple count of presidents and more about variation inside a stable institutional frame.
What the presidential libraries preserve
The presidential history record is not limited to office dates. The National Archives’ presidential library system adds a second layer of scale to the history.
According to the source, the National Archives Presidential Library system is composed of sixteen Presidential Libraries (U.S. National Archives, “Presidential Libraries and Museums of the National Archives”). That number matters because it shows the archival system as a formal national structure rather than a loose collection of museums.
The preservation totals are larger still:
- Over 600 million pages of textual materials are maintained by the Presidential Libraries (U.S. National Archives, “About Presidential Libraries”).
- Nearly 20 million photographs are held by the Presidential Libraries (U.S. National Archives, “About Presidential Libraries”).
- Over 20 million feet of motion picture film are held by the Presidential Libraries (U.S. National Archives, “About Presidential Libraries”).
- Nearly 100,000 hours of disc, audiotape, and videotape recordings are held by the Presidential Libraries (U.S. National Archives, “About Presidential Libraries”).
Those totals make the presidential record feel less like a ceremonial archive and more like a deep historical data warehouse.
Archival scale in one view
| Archive measure | Count | Source label |
|---|---|---|
| Presidential Libraries | 16 | U.S. National Archives, “Presidential Libraries and Museums of the National Archives” |
| Textual materials | over 600 million pages | U.S. National Archives, “About Presidential Libraries” |
| Photographs | nearly 20 million | U.S. National Archives, “About Presidential Libraries” |
| Motion picture film | over 20 million feet | U.S. National Archives, “About Presidential Libraries” |
| Audio and video recordings | nearly 100,000 hours | U.S. National Archives, “About Presidential Libraries” |
That table shows how the presidential record expands from a list of dates into a broader national memory system. The office terms create the timeline, and the libraries preserve the evidence surrounding that timeline.
Why the White House numbers matter
The White House statistics add a useful physical layer to the presidency dataset.
The source says the White House has 132 rooms in the Residence, 35 bathrooms in the Residence, and 412 doors (The White House, “The White House Building”). Those numbers are not historical term data, but they give the office a concrete spatial dimension.
The room count shows how large the executive residence is as a working and living space. The bathroom and door counts help make the building feel measurable in the same way the presidency itself is measurable by dates.
White House facts at a glance
- 132 rooms in the Residence (The White House, “The White House Building”).
- 35 bathrooms in the Residence (The White House, “The White House Building”).
- 412 doors (The White House, “The White House Building”).
Those figures matter because they place the presidency inside an actual physical environment rather than treating it as an abstract political timeline.
Quick comparison table
The strongest comparisons in the data are between office terms, archival volume, and the built environment of the presidency.
| Category | Statistic | What it helps compare | Source label |
|---|---|---|---|
| Presidency span | George Washington served from April 30, 1789 to March 4, 1797 | Foundational start of the sequence | U.S. National Archives, “US Presidents in the Census Records” |
| Presidency span | William Henry Harrison served from March 4, 1841 to April 4, 1841 | Extreme short-term outlier | U.S. National Archives, “US Presidents in the Census Records” |
| Presidency span | Franklin D. Roosevelt served from March 4, 1933 to April 12, 1945 | Extreme long-term outlier | U.S. National Archives, “US Presidents in the Census Records” |
| Presidency span | Donald Trump served from January 20, 2025 to present | Current term in the source record | U.S. National Archives, “US Presidents in the Census Records” |
| Archive scale | over 600 million pages | Textual preservation scale | U.S. National Archives, “About Presidential Libraries” |
| Archive scale | nearly 20 million photographs | Visual preservation scale | U.S. National Archives, “About Presidential Libraries” |
| Building scale | 132 rooms | Residence size | The White House, “The White House Building” |
| Building scale | 412 doors | Building complexity | The White House, “The White House Building” |
That compact comparison makes it easier to move from memory-based presidential history to a measurable record.
Reading the history as a dataset
This collection of presidential statistics works well because it combines several layers of information.
First, there is the office timeline itself, which gives exact dates for every term in the sequence from Washington through the current presidency in the source record (U.S. National Archives, “US Presidents in the Census Records”). Second, there is the archival layer, which shows the enormous amount of material preserved by the National Archives presidential library system (U.S. National Archives, “About Presidential Libraries”). Third, there is the physical layer of the White House, where room, bathroom, and door counts turn the presidency into a measurable place as well as an institution (The White House, “The White House Building”).
Together, those layers show why presidential history statistics are useful. They do not just tell you who served. They tell you how long each person served, how the historical record is preserved, and how much physical infrastructure surrounds the office.
The result is a dataset that supports timeline comparisons, outlier analysis, and institutional scale reading without needing any extra assumptions beyond the source facts.