Marcos Sastre (2 October 1808, Montevideo – 15 February 1887, Buenos Aires) was an Argentine writer, born in neighboring Uruguay.

He started his schooling in Montevideo, but his family moved to the city of Santa Fe in Argentina during the Portuguese occupation.

In the same year, the French blockade of the Río de la Plata started, which first for cultural reasons, then political, defined them as anti-Rosas.

It was a study more literary than scientific on the flora, fauna and geography of the Paraná Delta, illustrated with engravings made by the author himself.

After a visit to his school by members of the paramilitary Mazorca, he left for Santa Fe and later to Entre Ríos, where in 1849, he founded the newspaper El Sudamericano.

The following year, Governor Urquiza named him Inspector General of schools and director of the official newspaper El Federal.