| Mariano Garchitorena | |
| Office: | Secretary of Agriculture and Natural Resources Secretary of Agriculture and Commerce (1946–1947) |
| Term Start: | May 28, 1946 |
| Term End: | September 1, 1948 |
| President: | Manuel Roxas Elpidio Quirino |
| Predecessor: | Vicente Singson Encarnacion |
| Successor: | Placido Mapa |
| Order1: | 8th and 19th |
| Office1: | Governor of Camarines Sur |
| Term Start1: | 1945 |
| Term End1: | 1945 |
| Predecessor1: | Mariano Villafuerte |
| Successor1: | Gabriel Prieto |
| Term Start2: | 1919 |
| Term End2: | 1919 |
| Predecessor2: | Manuel Crescini |
| Successor2: | Julian Ocampo Jr. |
| Birth Name: | Mariano Garchitorena y Chereau |
| Birth Date: | 12 February 1898 |
| Birth Place: | Hong Kong |
| Death Place: | Manila, Philippines |
| Parents: | Andres Garchitorena Margarite Chereau |
| Spouse: | Caridad Pamintuan |
| Party: | Liberal |
Mariano Garchitorena y Chereau (February 12, 1898 – October 1, 1961) was a Filipino politician of Spanish-French descent.
Garchitorena was the son of Don Andres Garchitorena and a French lady, Margarite Chereau. He was married to Dona Caridad Pamintuan. He was the cousin of guerrilla Major Don Tomas T. Garchitorena and the brother of the actor Salvador A. Garchitorena, grandfather of Anjo Yllana, Jomari Yllana, and Jaime Garchitorena. He was also the uncle of Justice Francis Garchitorena, actor Andres Centenera and TV and radio star in the 1960s, Andres Garchitorena, brother of Stellita of Hanawan, Camarines Sur.
He was briefly Governor of Camarines Sur in 1919 and again in 1945. He was elected President of the Abacá Fiber Institute of the Philippines, then appointed by President Manuel Roxas as Secretary of Agriculture and Commerce, later run for senator one slot below of being elected, became ambassador to Spain. He retired and remained the Liberal Party Chairman in Bicolandia.[1]