General elections were held in Guatemala

Guatemala

Guatemala is a country in Central America bordered by Mexico to the north and west, the Pacific Ocean to the southwest, Belize to the northeast, the Caribbean to the east, and Honduras and El Salvador to the southeast...

 on 6 March 1966. After no candidate received 50% or more of the national vote, Julio César Méndez Montenegro

Julio César Méndez Montenegro

Julio César Méndez Montenegro was the Revolutionary Party President of Guatemala from 1 July 1966 to 1 July 1970. The only civilian to occupy Guatemala's presidency during the long period of military rule between 1954 and 1986, Méndez was not allowed to act independently of the military and was...

 was elected President by Congress

Congress of Guatemala

The Congress of the Republic is the unicameral legislature of the Republic of Guatemala.It comprises 158 deputies, who are elected by direct universal suffrage to serve four-year terms . Twenty-nine of these are elected from nationwide lists, with the rest on a district list basis...

 on 10 May. On the Congressional elections, the Revolutionary Party won 28 of the 54 seats. Voter turnout was 56.27% in the presidential election and 55.01% in the Congressional elections

President

Candidate	Party	Public vote		Congress vote
		Votes	%	Votes	%
Julio César Méndez Montenegro Julio César Méndez Montenegro Julio César Méndez Montenegro was the Revolutionary Party President of Guatemala from 1 July 1966 to 1 July 1970. The only civilian to occupy Guatemala's presidency during the long period of military rule between 1954 and 1986, Méndez was not allowed to act independently of the military and was...	Revolutionary Party	209,204	44.78	35	64.81
Juan de Dios Aguilar de León	Institutional Democratic Party Institutional Democratic Party The Institutional Democratic Party was a Guatemalan pro-government political party active during the 1970s.The PID was formed in 1963 by Enrique Peralta Azurdia after he had seized power in a coup. A centre-right party, it was modelled on the Mexican Institutional Revolutionary Party. From the...	148,025	31.68	19	35.19
Miguel Angel Ponciano	National Liberation Movement National Liberation Movement (Guatemala) The National Liberation Movement was a Guatemala military-backed party formed in 1960 by Mario Sandoval Alarcón as a breakaway from the National Democratic Movement....	109,981	23.54
Invalid/blank votes		64,060
0
Total		531,270	100	54	100
Source: Nohlen

Congress

Party	Votes	%	Seats
Revolutionary Party	192,366	44.07	29
Institutional Democratic Party Institutional Democratic Party The Institutional Democratic Party was a Guatemalan pro-government political party active during the 1970s.The PID was formed in 1963 by Enrique Peralta Azurdia after he had seized power in a coup. A centre-right party, it was modelled on the Mexican Institutional Revolutionary Party. From the...	138,873	31.81	21
National Liberation Movement National Liberation Movement (Guatemala) The National Liberation Movement was a Guatemala military-backed party formed in 1960 by Mario Sandoval Alarcón as a breakaway from the National Democratic Movement....	105,306	24.12	5
Invalid/blank votes	82,848
Total	519,393	100	55
Source: Nohlen