3rd federal electoral district of the State of Mexico

The 3rd federal electoral district of the State of Mexico (Spanish: Distrito electoral federal 03 del Estado de México) 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.^[1]

State of Mexico's 3rd
Electoral district of the Chamber of Deputies of Mexico
State of Mexico's districts since 2023
Incumbent
Member	Diana Castillo Gabino
Party	▌Labour Party
Congress	66th (2024–2027)
District
State	State of Mexico
Head town	Atlacomulco de Fabela
Coordinates	19°48′N 99°52′W
Covers	Atlacomulco, Ixtlahuaca, Jiquipilco, Jocotitlán
PR region	Fifth
Precincts	148
Population	415,863 (2020 Census)
Indigenous	Yes (65%)

2017–2022 districting scheme

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.^[2][3]

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.^[4][5][6]

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,^[7] the 3rd district covers 148 electoral precincts (secciones electorales) across four municipalities in the north-west of the state:^[8][9]

• Atlacomulco, Ixtlahuaca, Jiquipilco and Jocotitlán.

The head town (cabecera distrital), where results from individual polling stations are gathered together and tallied, is the city of Atlacomulco de Fabela.^[1]

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.^[1][10][a]

Previous districting schemes

Evolution of electoral district numbers

	1974	1978	1996	2005	2017	2023
State of Mexico	15	34	36	40	41	40
Chamber of Deputies	196	300
Sources: [1][11][12][13]

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.^{[13][14][15][12]}

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.^[16][12]

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.^[17]

Deputies returned to Congress

National parties
Current
	PAN
	PRI
	PT
	PVEM
	MC
	Morena
Defunct or local only
	PLM
	PNR
	PRM
	PNM
	PP
	PPS
	PARM
	PFCRN
	Convergencia
	PANAL
	PSD
	PES
	PES
	PRD

State of Mexico's 3rd district

Election	Deputy	Party	Term	Legislature
1916 [es]	Enrique O'Farril[18][19]		1916–1917	Constituent Congress of Querétaro
...
1979	Alberto Rábago Camacho[20]		1979–1982	51st Congress
1982	Hugo Díaz Velázquez[21]		1982–1985	52nd Congress
1985	Alberto Rábago Camacho[22]		1985–1988	53rd Congress
1988	Octavio Moreno Toscano[23]		1988–1991	54th Congress
1991	Armando Neira Chávez[24]		1991–1994	55th Congress
1994	Lauro Rendón Castrejón[25]		1994–1997	56th Congress
1997	María Trinidad Emma Salinas López[26]		1997–2000	57th Congress
2000	Juan Manuel Martínez Nava[27]		2000–2003	58th Congress
2003	José Rangel Espinosa[28]		2003–2006	59th Congress
2006	Óscar Cárdenas Monroy[29]		2006–2009	60th Congress
2009	Emilio Chuayffet Chemor[30]		2009–2012	61st Congress
2012	José Rangel Espinosa[31]		2012–2015	62nd Congress
2015	Fidel Almanza Monroy[32]		2015–2018	63rd Congress
2018	María Teresa Marú Mejía[33]		2018–2021	64th Congress
2021	Óscar Cárdenas Monroy[34]		2021–2024	65th Congress
2024[4]	Diana Castillo Gabino[5][b]		2024–2027	66th Congress

Presidential elections

State of Mexico's 3rd district

Election	District won by	Party or coalition	%
2018[35]	Andrés Manuel López Obrador	Juntos Haremos Historia	51.8717
2024[36]	Claudia Sheinbaum Pardo	Sigamos Haciendo Historia	60.2936

Notes

1. Population figure indicates total inhabitants, not voters. The INE deems any local or federal electoral district where Indigenous or Afrodescendent inhabitants number 40% or more of the total to be an indigenous district.^[1]
2. Originally elected for Morena, Castillo Gabino was among the five deputies who switched to the Labour Party on 19 September 2024.^[6]