Robert J. Ryan Sr. | |
|---|---|
 | |
| 2nd US Ambassador to Niger | |
| In office July 9, 1964 – August 19, 1968 | |
| President | Lyndon B. Johnson |
| Preceded by | Mercer Cook |
| Succeeded by | Samuel C. Adams, Jr. |
| Personal details | |
| Born | July 11, 1914 Hatfield, Massachusetts |
| Died | September 13, 2003 (aged 89) Daytona Beach, Florida |
Robert Joseph Ryan Sr. (July 11, 1914 – September 17, 2003) was an American diplomat. Ryan served as the US Ambassador to Niger from 1964 to 1968.