Luis Alonso Barahona (1867 – 20 October 1915), sometimes spelt Baraona, was a Salvadoran military officer, politician, and diplomat who served as the minister of war and the navy in 1915.

Barahona stood as a presidential candidate in El Salvador in both 1907 and 1911, however, he lost both elections to Fernando Figueroa and Manuel Enrique Araujo, respectively.

[6] On 9 August 1900, Honduran President Terencio Sierra appointed Barahona as the governor of the Cortés Department, replacing General Pilar M. Martínez.

[11] On 3 March 1915, newly elected President Carlos Meléndez appointed Barahona to serve as minister of war and the navy, succeeding Francisco Martínez Suárez.

Meléndez declared nine days of national mourning and appointed Enrique Córdova to succeeded Barahona as minister of war and the navy.