As of March 2019, there have been 45 presidents in the history of the United States. The situation is as follows:

1. George Washington April 30, 1789 - March 4, 1797?

2. John Adams March 4, 1797 - March 4, 1801?

3. Thomas Jefferson ( Thomas Jefferson from March 4, 1801 to March 4, 1809?

4. James Madison from March 4, 1809 to March 4, 1817?

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5. James Monroe March 4, 1817 - March 4, 1825

6. John Quincy Adams (1825) March 4 - March 4, 1829?

7. Andrew Jackson March 4, 1829 - March 4, 1837?

8 , Martin van Buren (Martin van Buren) March 4, 1837-March 4, 1841

9. William Henry Harrison (William Henry Harrison) March 4, 1841-1841 April 4, 1841

10. John Tyler April 4, 1841 - March 4, 1845?

11. James Knox· James Knox Polk March 4, 1845-March 4, 1849?

12. Zachary Taylor, June 7, 1848-1848 August 9

13. Millard Fillmore March 4, 1850 - March 4, 1853

14. Frank Franklin Pierce March 4, 1853-March 4, 1857?

15. James Buchanan March 4, 1857-March 1861 4th?

16. Abraham Lincoln March 4, 1861 - April 15, 1865?

17. Andrew Johnson 1865 April 15, 1869 - March 4, 1869?

18. Ulysses Grant (Ulysses Grant) March 4, 1869 - March 4, 1877?

19. Rutherford B. Hays March 4, 1877 - March 4, 1881?

20. James Garfield ( James Garfield March 4, 1881-September 19, 1881?

21. Chester A. Arthur September 19, 1881-1885 March 4?

22. Stephen Grover Cleveland March 4, 1885 - March 4, 1889?

23. Benjamin Harry Benjamin Harrison from March 4, 1889 to March 4, 1893?

24. Stephen Grover Cleveland from March 4, 1893 to March 4, 1897 Date?

25. William McKinley March 4, 1897 - September 14, 1901?

26. Theodore Roosevelt ) September 14, 1901 - March 4, 1909?

27. William Howard Taft (William Howard Taft) March 4, 1909 - March 4, 1913?

28. Thomas Woodrow Wilson March 4, 1913 - March 4, 1921?

29. Warren Gammeril Ha Warren Gamaliel Harding March 4, 1921 - August 2, 1923?

30. Calvin Coolidge August 2, 1923 - March 4, 1929 ?

31. Herbert Hoover March 4, 1929 - March 4, 1933?

32. Franklin Roosevelt March 4, 1933 - April 12, 1945?

33. Harry S. Truman April 12, 1945 - January 20, 1953 Democratic Party

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34. Dwight D. Eisenhower January 20, 1953 - January 20, 1961?

35. John F. Kennedy) January 20, 1961 - November 22, 1963?

36. Lyndon Johnson (Lyndon Johnson) November 22, 1963 - January 20, 1969?

37. Richard Nixon January 20, 1969 - August 9, 1974?

38. Gerald Ford 1974 August 9 - January 20, 1977?

39. Jimmy Carter January 20, 1977 - January 20, 1981?

40 , Ronald Reagan January 20, 1981 - January 20, 1989?

41. George Herbert Walker Bush (George Herbert Walker Bush) 1989 January 20 - January 20, 1993?

42. Bill Clinton January 20, 1993 - January 20, 2001?

43 , George W Bush January 20, 2001-January 20, 2009?

44. Barack Obama January 20, 2009-2017 January 20, 2017?

45. Donald Trump January 20, 2017 - today?

Baidu Encyclopedia - President of the United States (Head of State of the United States of America) )