Marcos Sastre (1808–1887) was an Argentine writer of Uruguayan origin, born in Montevideo. He spent his career in Buenos Aires, where he passed away in 1887, leaving a notable mark on the region's literary history.
Sastre is primarily recognized for his role as a founder of the Salón Literario, an influential institution that he established alongside fellow writers Juan Bautista Alberdi, Juan María Gutiérrez, and Esteban Echeverría. This collaborative effort became a cornerstone of Argentine intellectual life.
The establishment of the Salón Literario is celebrated as the beginning of the Generation of '37. Through this movement, Sastre and his co-founders helped initiate a new era of literary and cultural development in Argentina.