| Francisco Aguilar Barquero | |
| Office: | 23rd President of Costa Rica |
| Term Start: | 2 September 1919 |
| Term End: | 8 May 1920 |
| Preceded: | Juan Bautista Quirós Segura |
| Succeeded: | Julio Acosta |
| Birth Date: | 21 May 1857 |
| Birth Place: | Cartago |
| Death Date: | 11 October 1924 (aged 67) |
| Death Place: | San José |
Francisco Ramón de Jesús Aguilar Barquero (21 May 1857 – 11 October 1924) served as provisional President of Costa Rica for eight months between 1919 and 1920.[1]
He was Governor of Cartago, Deputy for Limón (1888–1889), Secretary of War and Navy (1889), Deputy for Cartago (1890–1892), Deputy for San José (1912–1916) and Third Appointed to the Presidency (1914–1917).
His main achievement was successfully steering the country back to democratic normalcy after his predecessor's military dictatorship.
He was succeeded by Julio Acosta García.