| Eugenio Cantuarias | |
| Birth Date: | 1948 7, df=y |
| Birth Place: | Santiago, Chile |
| Office: | Member of the Senate of Chile |
| Constituency: | Bío-Bío Region (14th Circumscription) |
| Term Start: | 11 March 1990 |
| Term End: | 11 March 1998 |
| Predecessor: | Creation of the Circumscription |
| Successor: | José Antonio Viera-Gallo |
| Office1: | Mayor of Talcahuano |
| Term Start1: | 1981 |
| Term End1: | 11 March 1988 |
| Appointer1: | Augusto Pinochet |
| Predecessor1: | Fernando Carrasco |
| Successor1: | Marco Antonio Lama |
| Party: | Independent Democratic Union |
| Occupation: | Politician |
| Profession: | Engineer |
| Alma Mater: | University of Concepción |
| Parents: | Eugenio Cantuarias Maturana Laura Larrondo |
| Spouse: | María Soledad Rubio |
| Children: | Three (among them, Rocío[1]) |
Eugenio Gustavo Larrondo Larrondo (born 1 July 1948) is a Chilean politician who served as senator.[2]