# Ysgrifennydd Gwladol yr Unol Daleithiau

Mae'r **Ysgrifennydd Gwladol** (Saesneg: *United States Secretary of State*) yn uwch swyddog yn llywodraeth ffederal yr Unol Daleithiau, a phennaeth ar Adran Wladol yr U.D. Prif swyddogaeth yr Ysgrifennydd Gwladol yw polisi tramor ac ystyrir y swydd fod cyfwerth â rôl y Gweinidog Materion Tramor mewn gwledydd eraill.

## Rhestr Ysgrifenyddion Gwladol yr Unol Daleithiau

| Rhif
 | Llun
 | Enw
 | Cyfnod
 | Arlywydd
 |
| --- | --- | --- | --- | --- |
| Dechrau | Diwedd
 |
| 1
 |  | Thomas Jefferson
 | 26 Medi 1789
 | 31 Rhagfyr 1793
 | George Washington
 |
| 2
 |  | Edmund Randolph
 | 2 Ionawr 1794
 | 20 Awst 1795
 | George Washington
 |
| 3
 |  | Timothy Pickering
 | 10 Rhagfyr 1795
 | 12 Mai 1800
 | George Washington, John Adams
 |
| 4
 |  | John Marshall
 | 13 Mehefin 1800
 | 4 Chwefror 1801
 | John Adams
 |
| 5
 |  | James Madison
 | 2 Mai 1801
 | 3 Mawrth 1809
 | Thomas Jefferson
 |
| 6
 |  | Robert Smith
 | 5 Mawrth 1809
 | 1 Ebrill 1811
 | James Madison
 |
| 7
 |  | James Monroe
 | 2 Ebrill 1811
 | 30 Medi 1814
 | James Madison
 |
| 28 Chwefror 1815
 | 3 Mawrth 1817
 |
| 8
 |  | John Quincy Adams
 | 5 Mawrth 1817
 | 3 Mawrth 1825
 | James Monroe
 |
| 9
 |  | Henry Clay
 | 7 Mawrth 1825
 | 3 Mawrth 1829
 | John Quincy Adams
 |
| 10
 |  | Martin Van Buren
 | 28 Mawrth 1829
 | 23 Mai 1831
 | Andrew Jackson
 |
| 11
 |  | Edward Livingston
 | 24 Mai 1831
 | 29 Mai 1833
 | Andrew Jackson
 |
| 12
 |  | Louis McLane
 | 29 Mai 1833
 | 30 Mehefin 1834
 | Andrew Jackson
 |
| 13
 |  | John Forsyth
 | 1 Gorffennaf 1834
 | 31 Mawrth 1841
 | Andrew Jackson, Martin Van Buren
 |
| 14
 |  | Daniel Webster
 | 6 Mawrth 1841
 | 8 Mai 1843
 | William H. Harrison, John Tyler
 |
| 15
 |  | Abel P. Upshur
 | 24 Gorffennaf 1843
 | 28 Chwefror 1844
 | John Tyler
 |
| 16
 |  | John C. Calhoun
 | 1 Ebrill 1844
 | 10 Mawrth 1845
 | John Tyler
 |
| 17
 |  | James Buchanan
 | 10 Mawrth 1845
 | 7 Mawrth 1849
 | James Polk
 |
| 18
 |  | John M. Clayton
 | 8 Mawrth 1849
 | 22 Gorffennaf 1850
 | Zachary Taylor, Millard Fillmore
 |
| 19
 |  | Daniel Webster
 | 23 Gorffennaf 1850
 | 24 Hydref 1852
 | Millard Fillmore
 |
| 20
 |  | Edward Everett
 | 6 Tachwedd 1852
 | 3 Mawrth 1853
 | Millard Fillmore
 |
| 21
 |  | William L. Marcy
 | 7 Mawrth 1853
 | 6 Mawrth 1857
 | Franklin Pierce
 |
| 22
 |  | Lewis Cass
 | 6 Mawrth 1857
 | 14 Rhagfyr 1860
 | James Buchanan
 |
| 23
 |  | Jeremiah S. Black
 | 17 Rhagfyr 1860
 | 5 Mawrth 1861
 | James Buchanan
 |
| 24
 |  | William Seward
 | 5 Mawrth 1861
 | 4 Mawrth 1869
 | Abraham Lincoln, Andrew Johnson
 |
| 25
 |  | Elihu B. Washburne
 | 5 Mawrth 1869
 | 16 Mawrth 1869
 | Ulysses S. Grant
 |
| 26
 |  | Hamilton Fish
 | 17 Mawrth 1869
 | 12 Mawrth 1877
 | Ulysses S. Grant
 |
| 27
 |  | William M. Evarts
 | 12 Mawrth 1877
 | 7 Mawrth 1881
 | Rutherford B. Hayes
 |
| 28
 |  | James G. Blaine
 | 7 Mawrth 1881
 | 19 Rhagfyr 1881
 | James Garfield, Chester A. Arthur
 |
| 29
 |  | Frederick T. Frelinghuysen
 | 19 Rhagfyr 1881
 | 6 Mawrth 1885
 | Chester A. Arthur
 |
| 30
 |  | Thomas F. Bayard
 | 7 Mawrth 1885
 | 6 Mawrth 1889
 | Grover Cleveland
 |
| 31
 |  | James G. Blaine
 | 7 Mawrth 1889
 | 4 Mehefin 1892
 | Benjamin Harrison
 |
| 32
 |  | John W. Foster
 | 29 Mehefin 1892
 | 23 Chwefror 1893
 | Benjamin Harrison
 |
| 33
 |  | Walter Q. Gresham
 | 7 Mawrth 1893
 | 28 Mai 1895
 | Grover Cleveland
 |
| 34
 |  | Richard Olney
 | 10 Mehefin 1895
 | 5 Mawrth 1897
 | Grover Cleveland
 |
| 35
 |  | John Sherman
 | 6 Mawrth 1897
 | 27 Ebrill 1898
 | William McKinley
 |
| 36
 |  | William R. Day
 | 28 Ebrill 1898
 | 16 Medi 1898
 | William McKinley
 |
| 37
 |  | John Hay
 | 30 Medi 1898
 | 1 Gorffennaf 1905
 | William McKinley, Theodore Roosevelt
 |
| 38
 |  | Elihu Root
 | 19 Gorffennaf 1905
 | 27 Ionawr 1909
 | Theodore Roosevelt
 |
| 39
 |  | Robert Bacon
 | 27 Ionawr 1909
 | 5 Mawrth 1909
 | Theodore Roosevelt
 |
| 40
 |  | Philander C. Knox
 | 6 Mawrth 1909
 | 5 Mawrth 1913
 | William Taft
 |
| 41
 |  | William Jennings Bryan
 | 5 Mawrth 1913
 | 9 Mehefin 1915
 | Woodrow Wilson
 |
| 42
 |  | Robert Lansing
 | 24 Mehefin 1915
 | 13 Chwefror 1920
 | Woodrow Wilson
 |
| 43
 |  | Bainbridge Colby
 | 23 Mawrth 1920
 | 4 Mawrth 1921
 | Woodrow Wilson
 |
| 44
 |  | Charles Evans Hughes
 | 5 Mawrth 1921
 | 4 Mawrth 1925
 | Warren G. Harding, Calvin Coolidge
 |
| 45
 |  | Frank B. Kellogg
 | 5 Mawrth 1925
 | 28 Mawrth 1929
 | Calvin Coolidge, Herbert Hoover
 |
| 46
 |  | Henry L. Stimson
 | 28 Mawrth 1929
 | 4 Mawrth 1933
 | Herbert Hoover
 |
| 47
 |  | Cordell Hull
 | 4 Mawrth 1933
 | 30 Tachwedd 1944
 | Franklin D. Roosevelt
 |
| 48
 |  | Edward Stettinius, Jr.
 | 1 Rhagfyr 1944
 | 27 Mehefin 1945
 | Franklin D. Roosevelt, Harry S. Truman
 |
| 49
 |  | James F. Byrnes
 | 3 Gorffennaf 1945
 | 21 Ionawr 1947
 | Harry Truman
 |
| 50
 |  | George C. Marshall
 | 21 Ionawr 1947
 | 29 Ionawr 1949
 | Harry Truman
 |
| 51
 |  | Dean Acheson
 | 21 Ionawr 1949
 | 20 Ionawr 1953
 | Harry Truman
 |
| 52
 |  | John Foster Dulles
 | 21 Ionawr 1953
 | 22 Ebrill 1959
 | Dwight Eisenhower
 |
| 53
 |  | Christian Herter
 | 22 Ebrill 1959
 | 20 Ionawr 1961
 | Dwight Eisenhower
 |
| 54
 |  | Dean Rusk
 | 21 Ionawr 1961
 | 20 Ionawr 1969
 | John F. Kennedy, Lyndon B. Johnson
 |
| 55
 |  | William P. Rogers
 | 22 Ionawr 1969
 | 3 Medi 1973
 | Richard Nixon
 |
| 56
 |  | Henry Kissinger
 | 22 Medi 1973
 | 20 Ionawr 1977
 | Richard Nixon, Gerald Ford
 |
| 57
 |  | Cyrus Vance
 | 23 Ionawr 1977
 | 28 Ebrill 1980
 | Jimmy Carter
 |
| 58
 |  | Edmund Muskie
 | 8 Mai 1980
 | 18 Ionawr 1981
 | Jimmy Carter
 |
| 59
 |  | Alexander Haig
 | 22 Ionawr 1981
 | 5 Gorffennaf 1982
 | Ronald Reagan
 |
| 60
 |  | George P. Shultz
 | 16 Gorffennaf 1982
 | 20 Ionawr 1989
 | Ronald Reagan
 |
| 61
 |  | James Baker
 | 25 Ionawr 1989
 | 23 Awst 1992
 | George H. W. Bush
 |
| 62
 |  | Lawrence Eagleburger
 | 8 Rhagfyr 1992
 | 19 Ionawr 1993
 | George H. W. Bush
 |
| 63
 |  | Warren Christopher
 | 20 Ionawr 1993
 | 17 Ionawr 1997
 | Bill Clinton
 |
| 64
 |  | Madeleine Albright
 | 23 Ionawr 1997
 | 19 Ionawr 2001
 | Bill Clinton
 |
| 65
 |  | Colin Powell
 | 20 Ionawr 2001
 | 26 Ionawr 2005
 | George W. Bush
 |
| 66
 |  | Condoleezza Rice
 | 26 Ionawr 2005
 | 20 Ionawr 2009
 | George W. Bush
 |
| 67
 |  | Hillary Clinton
 | 21 Ionawr 2009
 | 1 Chwefror 2013
 | Barack Obama
 |
| 68
 |  | John Kerry
 | 1 Chwefror 2013
 | 20 Ionawr 2017
 | Barack Obama
 |
| 69
 |  | Rex Tillerson
 | 1 Chwefror 2017
 | 31 Mawrth 2018
 | Donald Trump
 |
| 70
 |  | Mike Pompeo
 | 26 Ebrill 2018
 | 20 Ionawr 2021
 | Donald Trump
 |
| 71
 |  | Antony Blinken
 | 26 Ionawr 2021
 | 20 Ionawr 2025
 | Joe Biden
 |
| 72
 |  | Marco Rubio
 | 21 Ionawr 2025
 | *Presennol* | Donald Trump
 |