| Marta Isasi | |
| Birth Date: | 1966 1, df=y |
| Birth Place: | Santiago, Chile |
| Office1: | Deputy of the Republic of Chile 13th District |
| Term Start1: | 11 March 2006 |
| Term End1: | 11 March 2014 |
| Predecessor1: | Néstor Jofré |
| Successor1: | Renzo Trisotti |
| Party: | Regionalist Action Party of Chile (2003–2007) Unión Demócrata Independiente (2009–2010) Independent Regionalist Party (2010–2012) |
| Occupation: | Politician |
| Children: | Three |
Marta Eliana Isasi Barbieri (born 15 January 1966) is a Chilean politician who served as Deputy of the Republic of Chile.