La República perdida ("The Lost Republic") is the name of a series of Argentine documentary films about the history of Argentina. It is focused on the Coups d'état in Argentina, and uses photos and videotapes, while Aldo Barbero narrates it. It was directed by Miguel Pérez.

The first documentary film was edited in 1983, after the end of the National Reorganization Process (the last coups d'état in Argentina) and the return of democratic rule. The second one, La república perdida II, was edited in 1986.