To date, forty-three people have been sworn into the office of the President of the United States of America.  But there have been forty four Presidencies so far.  Grover Cleveland served two non consecutive terms (1885-1889 and 1893-1897) and is therefore the twenty second and the twenty fourth President.  George Washington is the first President of the United States.  Franklin D. Roosevelt spent the longest time in office which was over 12 years (1933-1945.)  He is the only President to serve more than two terms.  The current President, Barack Obama assumed the office on January 20, 2009.

The list of the past Presidents is as follows:

18^th Century

1. George Washington, 1789-1797
2. John Adams, 1797-1801

19^th Century

1. Thomas Jefferson, 1801-1809
2. James Madison, 1809-1817  
3. James Monroe, 1817-1825  
4. John Quincy Adams, 1825-1829
5. Andrew Jackson, 1829-1837  
6. Martin Van Buren, 1837-1841
7. William Henry Harrison, 1841
8. John Tyler, 1841-1845
9. James K. Polk, 1845-1849
10. Zachary Taylor, 1849-1850
11. Millard Fillmore, 1850-1853
12. Franklin Pierce, 1853-1857
13. James Buchanan, 1857-1861
14. Abraham Lincoln, 1861-1865
15. Andrew Johnson,  1865-1869
16. Ulysses S. Grant,   1869-1877
17. Rutherford B. Hayes, 1877-1881
18. James Garfield, 1881
19. Chester A. Arthur, 1881-1885
20. Grover Cleveland, 1885-1889
21. Benjamin Harrison, 1889-1893
22. Grover Cleveland, 1893-1897
23. William McKinley, 1897-1901

20^th Century

1. Theodore Roosevelt, 1901-1909
2. William Howard Taft, 1909-1913
3. Woodrow Wilson, 1913-1921
4. Warren Gamaliel Harding, 1921-1923
5. Calvin Coolidge, 1923-1929
6. Herbert Clark Hoover, 1929-1933
7. Franklin Delano Roosevelt, 1933-1945
8. Harry S. Truman, 1945-1953
9. Dwight David Eisenhower 1953-1961
10. John Fitzgerald Kennedy, 1961-1963
11. Lyndon Baines Johnson, 1963-1969
12. Richard Milhous Nixon, 1969-1974
13. Gerald Rudolph Ford, 1974-1977
14. James Earl Carter, Jr., 1977-1981
15. Ronald Wilson Reagan, 1981-1989
16. George Herbert Walker Bush, 1989-1993
17. William Jefferson Clinton, 1993-2001

21^st Century

1.  George Walker Bush, 2001-2009