George McWillie Williamson (1829–1882) was an American diplomat who served as US ambassador to Nicaragua, Costa Rica, El Salvador and Guatemala,[1] under the administration of Ulysses S. Grant.[2]
| Office: | Minister Resident to Costa Rica |
| Termstart: | August 13, 1873 |
| Termend: | January 31, 1879 |
| President: | Ulysses S. Grant Rutherford B. Hayes |
| Predecessor: | Jacob B. Blair |
| Successor: | Cornelius A. Logan |
| Office2: | Minister Resident to Nicaragua |
| Termstart2: | November 1, 1873 |
| Termend2: | January 31, 1879 |
| President2: | Ulysses S. Grant Rutherford B. Hayes |
| Predecessor2: | Charles N. Riotte |
| Successor2: | Cornelius A. Logan |
| Office3: | Minister Resident to El Salvador |
| Termstart3: | October 18, 1873 |
| Termend3: | July 7, 1879[3] |
| President3: | Ulysses S. Grant Rutherford B. Hayes |
| Predecessor3: | Thomas Biddle |
| Successor3: | Cornelius A. Logan |
| Office4: | Minister Resident to Guatemala |
| Termstart4: | September 9, 1873 |
| Termend4: | January 31, 1879 |
| President4: | Ulysses S. Grant Rutherford B. Hayes |
| Predecessor4: | Silas A. Hudson |
| Successor4: | Cornelius A. Logan |