Mario Sandoval Alarcón (May 18, 1923 – April 17, 2003) was a Guatemalan politician who served as vice president of Guatemala from 1974 to 1978 under Kjell Eugenio Laugerud García.

A member and founder of the political party, Movimiento de Liberacion Nacional, Sandoval served as President of the Congress from 1970 to 1974.

As part of the MLN, he played a role in the widespread murders committed by the Mano Blanca death squadrons [1].

[3][4] During his time as vicepresident he helped president Kjell after the 1976 earthquake that affected a great part of the country.

His aversion to communism and methods for fighting against it was passed on to some of his followers, one of whom was Roberto D'Aubuisson, founder of El Salvador's Nationalist Republican Alliance (ARENA) party [6].