The 3rd 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, elected in the 2024 general election, is Diana Castillo Gabino. Originally elected for the National Regeneration Movement (Morena), she switched allegiance to the Labour Party on 19 September 2024.
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 3rd district covers 148 electoral precincts () across four municipalities in the north-west of the state: Atlacomulco, Ixtlahuaca, Jiquipilco and Jocotitlán. The head town (), where results from individual polling stations are gathered together and tallied, is the city of Atlacomulco de Fabela.
The district reported a population of 415,863 in the 2020 census. With Indigenous and Afrodescendent inhabitants accounting for over 65% of that number, the 3rd district is classified by the INE as an indigenous district.
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 3rd district was situated as follows:
2005–2022 The district had the same configuration under both the 2017–2022 and 2005–2017 schemes. It covered the municipalities of Atlacomulco, Ixtlahuaca, Jiquipilco, Jocotitlán and El Oro. The head town was at Atlacomulco.
1996–2005 The municipalities of El Oro, Temascalcingo, San Felipe del Progreso, San José del Rincón and Villa Victoria. The head town was at San Felipe del Progreso. The link contains comparative maps of the 1996 and 2005 schemes.
1978–1996 The municipalities of Almoloya del Río, Atizapán, Calimaya, Capulhuac, Chapultepec, Jalatlaco, Joquicingo, Lerma, Mexicaltzingo, Ocoyoacac, Rayón, San Antonio la Isla, San Mateo Atenco, Tenango del Valle, Texcalyacac, Tianguistenco and Zinacantepec, with its head town at Lerma.
Deputies returned to Congress
+ State of Mexico's 3rd district Election Deputy Party Term LegislatureEnrique O'Farril1916–1917Constituent Congressof Querétaro ...1979Alberto Rábago Camacho1979–198251st Congress1982Hugo Díaz Velázquez1982–198552nd Congress1985Alberto Rábago Camacho1985–198853rd Congress1988Octavio Moreno Toscano1988–199154th Congress1991Armando Neira Chávez1991–199455th Congress1994Lauro Rendón Castrejón1994–199756th Congress1997María Trinidad Emma Salinas López1997–200057th Congress2000Juan Manuel Martínez Nava2000–200358th Congress2003José Rangel Espinosa2003–200659th Congress2006Óscar Cárdenas Monroy2006–200960th Congress2009Emilio Chuayffet Chemor2009–201261st Congress2012José Rangel Espinosa2012–201562nd Congress2015Fidel Almanza Monroy2015–201863rd Congress2018María Teresa Marú Mejía2018–202164th Congress2021Óscar Cárdenas Monroy2021–202465th Congress2024Diana Castillo Gabino 2024–202766th Congress
Presidential elections + State of Mexico's 3rd district Election District won by Party or coalition % 2018Andrés Manuel López Obrador Juntos Haremos Historia 51.87172024Claudia Sheinbaum Pardo Sigamos Haciendo Historia 60.2936
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