Sergio Casas (born 13 January 1971) is an Argentine politician who was Governor of La Rioja Province from 2015 to 2019.

[2] The candidate of the Radical Civic Union denounced electoral fraud, but eventually accepted Casas' victory.

He acknowledges both the former governor Beder Herrera and the former president Cristina Fernández de Kirchner as political leaders.

[2] Casas attended the presidential inauguration of Mauricio Macri on December 10, 2015, in spite of the instructions from the Front for Victory to avoid doing so.

[5] In contrast with Beder Herrera, Casas received the local mayors and legislators of other political parties, to arrange joint actions on behalf of the province.