General elections were held in Mexico on 5 July 1964. The presidential elections were won by Gustavo DÃÂaz Ordaz, who received 89% of the vote. In the Chamber of Deputies election, the Institutional Revolutionary Party won 175 of the 210 seats.
The elected deputies served from 1964 to 1967 () while the senators served from 1964 to 1970 (46th and 47th Congresses).
The 1964 election was the first to use the party deputy mechanism: a form of proportional representation through which three parties other than the hegemonic Institutional Revolutionary Party (PRI) â none of which won any first-past-the-post districts â were allocated 32 seats.