Salvador Silvestre del Rosario Jovellanos Guanes (December 31, 1833 – February 11, 1881) was a Paraguayan politician.

He was one of the early supporters of this idea, together with Otoniel Peña participating in the meeting of the steering committee held on January 18, 1865.

In mid-January 1869, a couple of weeks after Asuncion was occupied by the Allied forces, Jovellanos returned to his homeland together with other exiles - Juan Bautista Gill, José Segundo Decoud, Juan Antonio Jara, Carlos Loizaga, Benigno Ferreira, Cayo Miltos and others who signed a petition asking the Allies for formation of a Provisional government.

On March 25, 1870, he joined the Gran Club del Pueblo (a precursor of Colorado Party) which was led by Facundo Machaín.

His government paved some streets of Asuncion; created the Council of Public Education, Immigration office and the Economic and Management Boards.

Jovellanos was faced with many coup attempts and finally was forced from power after a rebellion started in 1874 under nationalist General Bernardino Caballero.