The 12th federal electoral district of the State of Mexico () is one of the 300 electoral districts into which Mexico is divided for elections to the federal Chamber of Deputies and one of 40 such districts in the State of Mexico.
It elects one deputy to the lower house of Congress for each three-year legislative session by means of the first-past-the-post system. Votes cast in the district also count towards the calculation of proportional representation ("plurinominal") deputies elected from the fifth region.
The current member for the district, re-elected in the 2024 general election, is Armando Corona Arvizu of the National Regeneration Movement (Morena).
District territory Under the 2023 districting plan adopted by the National Electoral Institute (INE), which is to be used for the 2024, 2027 and 2030 federal elections, the 12th district is located in the Greater Mexico City urban area, covering 172 precincts (secciones electorales) in the western portion of one of the state's 125 municipalities: Ixtapaluca
The head town (), where results from individual polling stations are gathered together and tallied, is the city of Ixtapaluca. In the 2020 census, the district reported a total population of 407,396.
Previous districting schemes + Evolution of electoral district numbers 1974 1978 1996 2005 2017 2023 State of Mexico15 34 36 40 41 40 Chamber of Deputies 196 300 Sources:
Under the previous districting plans enacted by the INE and its predecessors, the 12th district was situated as follows:
2017–2022 The western portion of Ixtapaluca.
2005–2017 The entire municipality of Ixtapaluca and some northern neighbourhoods of Chalco.
1996–2005 The municipalities of Atenco, Chiautla, Chiconcuac, Ixtapaluca, Papalotla and Texcoco. The head town was at Texcoco de Mora. The link contains comparative maps of the 1996 and 2005 schemes.
1978–1996 Portions of the municipalities of Atizapán de Zaragoza and Tlalnepantla, with its head town at Atizapán de Zaragoza.
Deputies returned to Congress
+ State of Mexico's 12th district Election Deputy Party Term LegislatureJuan Manuel Giffard1916–1917Constituent Congressof Querétaro ...1979Lorenzo Valdepeñas Machuca1979–198251st Congress1982Maurilio Hernández González1982–198552nd Congress1985Luis Pérez Díaz1985–198853rd Congress1988Regulo Pastor Hernández Rivera1988–199154th Congress1991Pablo Casas Jaime1991–199455th Congress1994José Francisco Lozada Chávez1994–199756th Congress1997Alberto Martínez Miranda1997–200057th Congress2000Beatriz Cervantes Mandujano2000–200358th Congress2003Fernando Fernández García2003–200659th Congress2006Rafael Plácido Ramos Becerril2006–200960th Congress2009Armando Corona Rivera2009–201261st Congress2012César Reynaldo Navarro de Alba2012–201562nd Congress2015Maricela Serrano Hernández2015–201863rd Congress2018Felipe Rafael Arvizu de la Luz 2018–202164th Congress2021Armando Corona Arvizu 2021–202465th Congress2024Armando Corona Arvizu 2024–202766th Congress
Presidential elections + State of Mexico's 12th district Election District won by Party or coalition % 2018Andrés Manuel López Obrador Juntos Haremos Historia 60.14162024Claudia Sheinbaum Pardo Sigamos Haciendo Historia 67.2635
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