July 2, 2006 Held


United Mexican States

Election for Camara de Senadores (Mexican Senate)


Voter Participation

Cast Votes:41,762,798
Valid Votes:40,740,318
Invalid Votes:1,022,480

Vote Share by Party:

Party Seats Won Seats Change Votes

National Action Party 52 - 14,043,213


Institutional Revolutionary Party 38 - 11,689,110


Party of the Democratic Revolution 36 - 12,403,241


New Alliance Party (Partido Nueva Alianza) 1 - 796,102


Social Democratic and Peasants Alterntaive Party (Alternativa Socialdemócrata y Campesina) 1 - 1,689,099


Others - - 119,553

Election Results Modified: Apr 11, 2016

General Information

At stake in this election:

  • 128 seats in the Senate (Camara de Senadores)

Description of government structure:

  • Chief of State: President Vicente FOX Quesada *
  • Head of Government: President Vicente FOX Quesada
  • Assembly: Mexico has a bicameral National Congress (Congreso de la Union) consisting of the Senate (Camara de Senadores) with 128 seats and the Chamber of Deputies (Camara de Diputados) with 500 seats.

* The president is both the chief of state and head of government.

Description of electoral system:

  • The President is elected by plurality vote to serve a 6-year term.
  • In the Senate (Camara de Senadores), 96 members are elected by plurality vote in multi-member constituencies to serve 6-year terms and 32 members are elected through a party-list proportional representation system to serve 6-year terms*. In the Chamber of Deputies (Camara de Diputados), 300 members are elected by simple majority vote in single-member constituencies to serve 3-year terms and 200 members are elected through a party-list proportional representation system to serve 3-year terms.

* The 96 senators are elected in 32 three-seat districts. In each of Mexico

Main Parties in the election:

  • National Action Party/Partido Accion Nacional
  • Institutional Revolutionary Party/Partido Revolucionario Instituccional
  • Party of the Democratic Revolution/Partido de la Revolucion Democratica
  • New Alliance Party/Partido Nueva Alianza
  • Social Democratic and Peasant Alternative/Alternativa Socialdemocrata y Campesina 

Population and Registered Voters:

  • Population: 111,382,857 (2006)
  • Registered voters: 71,351,585 (2006)

Gender Data:

·         Female Population: 56,025,292 (2006)

·         Is Mexico a signatory to CEDAW: Yes (17 July 1980)

·         Has Mexico ratified CEDAW: Yes (23 March 1981)

·         Gender Quota: Yes 

·         Female candidates in this election: No

·         Number of Female Parliamentarians: 113 (Chamber of Deputies); 22 (Senate) (following the 2006 elections)

·         Human Development Index Position: 74 (2014)

·         Social Institutions and Gender Index (SIGI) Categorization: N/A

Disability Data:

·         Is Mexico a signatory to CRPD: Yes (30 March 2007)

·         Has Mexico ratified CRPD: Yes (17 December 2007)

·         Population with a disability: 16,707,428 (est.)

Election Modified: May 10, 2024

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With Participation Rates