| William D. Clarke, Sr. | |
| Order: | 12th |
| Ambassador From: | United States |
| Country: | Eritrea |
| Term Start: | August 20, 1998 |
| Term End: | August 12, 2001 |
| President: | Bill Clinton George W. Bush |
| Predecessor: | John F. Hicks |
| Successor: | Donald J. McConnell |
| Profession: | Diplomat |
| Alma Mater: | Howard University Industrial College of the Armed Forces |
William D. Clarke, Sr. (born 1941) is an American diplomat. Clarke served as the United States Ambassador to Eritrea from 1998 to 2001.[1] He previously served over 30 years as a diplomat and member of the Diplomatic Security Service, including becoming the Deputy Assistant Secretary for Countermeasures and Information Security before his ambassadorship.[2] [3]
On October 3, 2022, the State Department announced a fellowship enabling a pipeline to become Diplomatic Security Service Special Agent named in Clarke's honor.[4]