Colonia Carlos Pellegrini is a small town and municipality in San Martín Department in Corrientes Province, Argentina.

It is connected by road to Mercedes in the southwest.

The climate of the area is subtropical, prone to storms, with an average summer temperature of 30 °C and can fall to −2 °C at night at lowest during the winter.

It has diverse wildlife, including caiman, swamp deer and over 350 species of birds.

This article about a place in Corrientes Province, Argentina is a stub.