| Sebastián Martín-Retortillo | |
| Office: | Deputy Minister to the Prime Minister, Responsible for Public Administration |
| Term Start: | 3 May 1980 |
| Term End: | 27 February 1981 |
| Primeminister: | Adolfo Suárez |
| Predecessor: | Office established |
| Successor: | Office disestablished |
| Birth Date: | 7 February 1931 |
| Birth Place: | Huesca, Spain |
| Death Place: | Madrid, Spain |
| Birthname: | Sebastián Ricardo Martín-Retortillo Baquer |
| Nationality: | Spanish |
| Party: | UCD |
| Alma Mater: | University of Zaragoza University of Bologna |
Sebastián Ricardo Martín-Retortillo Baquer (7 February 1931 – 19 October 2002) was a Spanish politician from the Union of the Democratic Centre (UCD) who served as Deputy Minister to the Prime Minister, Responsible for Public Administration from May 1980 to February 1981.[1]