| José de la Riva-Agüero y Looz Corswarem | |
| Office: | Minister of Foreign Affairs |
| President: | Mariano Herencia Zevallos |
| Term Start: | 7 August 1874 |
| Term End: | 3 February 1875 |
| Predecessor: | Juan Antonio Ribeyro |
| Successor: | José Antonio García y García |
| Office2: | Finance Minister of Peru |
| President2: | Mariano Herencia Zevallos |
| Term Start2: | 27 July 1872 |
| Term End2: | 2 August 1872 |
| Predecessor2: | Felipe Masías |
| Successor2: | José María de la Jara |
| Office4: | Deputy of the Republic of Peru |
| Constituency4: | Huarochirí District |
| Term Start4: | 1858 |
| Term End4: | 1861 |
| Birth Date: | 25 May 1827 |
| Birth Place: | Brussels, Belgium |
| Death Place: | Lima, Peru |
| Party: | Civilista Party |
| Spouse: | Mercedes Riglos y Díaz de Rávago |
| Children: | Jose Carlos de la Riva-Agüero Enrique de la Riva-Agüero Luis de la Riva-Agüero |
| Profession: | diplomat |
José Carlos Fulgencio Pedro Regalado de la Riva-Agüero y Looz Corswarem (Brussels, Belgium, 25 May 1827 – Lima, Peru, 16 August 1881) was a Peruvian politician and diplomat.
He was the son of José de la Riva Agüero, Marquess of Montealegre de Aulestia, first President of Peru, and the Belgian princess Caroline-Arnoldine de Looz-Corswarem.
He studied at the Université de Louvain. In 1858, Riva-Agüero was elected Alternate Deputy of the Congress for Huarochirí and Deputy of the Constituent Congress two years after.
Member of the Civilista Party, was Minister of Finance in 1872,[1] Minister of Foreign Affairs and member of the Senate of Peru. He served as Ambassador to Belgium, as well as to France.