General elections were held in Mexico on 7 July 1940. The presidential elections were won by Manuel Ávila Camacho, who received 94% of the vote. In the Chamber of Deputies election, the Party of the Mexican Revolution won all but one of the 173 seats.

Manuel Ávila Camacho was a Mexican politician and military leader who served as the President of Mexico from 1940 to 1946. Despite participating in the Mexican Revolution and achieving a high rank, he came to the presidency of Mexico because of his direct connection to General Lázaro Cárdenas and served him as a right-hand man as his Chief of his General Staff during the Mexican Revolution and afterwards. He was called affectionately by Mexicans "The Gentleman President". As president, he pursued "national policies of unity, adjustment, and moderation." His administration completed the transition from military to civilian leadership, ended confrontational anticlericalism, reversed the push for socialist education, and restored a working relationship with the US during World War II.