| Sergio Fernández | |
| Birth Date: | 1939 1, df=y |
| Birth Place: | Santiago, Chile |
| Office: | Member of the Senate of Chile |
| Constituency: | Magallanes Region (19th Circumscription) |
| Term Start: | 11 March 1998 |
| Term End: | 11 March 2006 |
| Predecessor: | Rolando Calderón |
| Successor: | Carlos Bianchi Chelech |
| Appointer1: | Patricio Aylwin |
| Constituency1: | Designated |
| Term Start1: | 11 March 1990 |
| Term End1: | 11 March 2006 |
| Predecessor1: | Creation of the Office |
| Successor1: | Edgardo Boeninger |
| Office2: | Minister of the Interior |
| President2: | Augusto Pinochet |
| Term Start2: | 11 July 1987 |
| Term End2: | 21 October 1988 |
| Predecessor2: | Ricardo García Rodríguez |
| Successor2: | Carlos Cáceres Contreras |
| President3: | Augusto Pinochet |
| Term Start3: | 14 April 1978 |
| Term End3: | 22 April 1982 |
| Predecessor3: | César Benavides |
| Successor3: | Enrique Montero Marx |
| Office4: | General Comptroller of Chile |
| Term Start4: | 30 December 1977 |
| Term End4: | 12 April 1978 |
| Predecessor4: | Héctor Humeres |
| Successor4: | Osvaldo Iturriaga |
| Office5: | Minister of Labor and Social Provision |
| Term Start5: | 8 March 1976 |
| Term End5: | 1 January 1978 |
| Predecessor5: | Nicanor Díaz Estrada |
| Successor5: | Vasco Costa |
| Party: | Independent Democratic Union (UDI) (1983–2024) |
| Alma Mater: | University of Chile (LL.B) |
| Occupation: | Lawyer, politician |
| Parents: | Florentino Fernández Argentina Fernández |
| Spouse: | María Eugenia Díaz |
| Children: | Four |
Sergio Ramiro Fernández Fernández (28 January 1939 – 1 April 2024) was a Chilean politician who served as a Senator and minister.[1] [2] Fernández Fernández died from cancer on 1 April 2024, at the age of 85.[3]