The President of the United States is the Head of State and Head of Government of the United States of America. Since 1789, fifty-five terms have been served by forty-four presidents.

[edit] List of Presidents of the United States

1789-1797: George Washington
1797-1801: John Adams
1801-1809: Thomas Jefferson
1809-1817: James Madison
1817-1825: James Monroe
1825-1829: John Quincy Adams
1829-1837: Andrew Jackson
1837-1841: Martin Van Buren
1841: William Henry Harrison
1841-1845: John Tyler
1845-1849: James K. Polk
1849-1850: Zachary Taylor
1850-1853: Millard Fillmore
1853-1857: Franklin Pierce
1857-1861: James Buchanan
1861-1865: Abraham Lincoln
1865-1869: Andrew Johnson
1869-1877: Ulysses S. Grant
1877-1881: Rutherford B. Hayes
1881: James A. Garfield
1881-1885: Chester A. Arthur
1885-1889: Grover Cleveland
1889-1893: Benjamin Harrison
1893-1897: Grover Cleveland
1897-1901: William McKinley
1901-1909: Theodore Roosevelt
1909-1913: William Howard Taft
1913-1921: Woodrow Wilson
1921-1923: Warren G. Harding
1923-1929: Calvin Coolidge
1929-1933: Herbert Hoover
1933-1945: Franklin D. Roosevelt
1945-1953: Harry S. Truman
1953-1961: Dwight D. Eisenhower
1961-1963: John F. Kennedy
1963-1969: Lyndon B. Johnson
1969-1974: Richard Nixon
1974-1977: Gerald Ford
1977-1981: Jimmy Carter
1981-1989: Ronald Reagan
1989-1993: George H. W. Bush
1993-2001: Bill Clinton
2001-2009: George W. Bush
2009-  : Barack Obama (incumbent)