| Carlos Loizaga | |
| Office1: | Triumvir of Paraguay |
| Term Start1: | 15 August 1869 |
| Term End1: | 31 August 1870 |
| Alongside1: | Cirilo Rivarola, Díaz de Bedoya |
| Predecessor1: | Francisco Solano López |
| Successor1: | Facundo Machaín |
| Birth Place: | Asunción, Viceroyalty of the Río de la Plata |
| Death Place: | Asunción, Paraguay |
Carlos Loizaga was member of the Paraguayan Triumvirate established by the occupying allied forces following the death of Francisco Solano López from 15 August 1869 to 31 August 1870.