Santa Rosa de Tastil is a rural municipality in Salta Province in northwestern Argentina.

[1] It is located in the Lerma Valley, near the ruins of the ancient indigenous city of Tastil, and is populated only by eleven persons, three of which are employees of the Moisés Serpa Regional Museum of Tastil.

A clinic, police station, school and church serve the small population, as well as around 150 rural inhabitants of the surrounding area.

The Moisés Serpa Regional Museum of Tastil, inaugurated after the 1997 declaration of the ruins as a National Historic Monument the same year, and displays artifacts found at the site and surroundings, including a mummy dating from the 14th century.

[2] The Train to the Clouds, a heritage railway and the third-highest in the world, passes the location, and the Puerta de Tastil station is nearby.