The 23rd federal electoral district of the State of Mexico (Spanish: Distrito electoral federal 23 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]

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 23rd district was created by the 1977 electoral reforms, which increased the number of single-member seats in the Chamber of Deputies from 196 to 300. Under that plan, the State of Mexico's seat allocation rose from 15 to 34.^[4] The new districts were first contended in the 1979 mid-term election.

Under the National Electoral Institute's 2022 districting plan, which is to be used for the 2024, 2027 and 2030 federal elections,^[5] the 23rd district is located between Toluca and Mexico City and covers eight of the state's 125 municipalities:

• Almoloya del Río, Atizapán, Capulhuac, Lerma, Ocoyoacac, Texcalyacac, Tianguistenco and Xalatlaco.^[6][7]

The district's head town (cabecera distrital), where results from individual polling stations are gathered together and tallied, is the city of Lerma de Villada. In the 2020 Census, the district reported a total population of 419,045.^[1][8]

Under the previous districting plans enacted by the INE and its predecessors, the 23rd district was situated as follows:

2017–2022

Nine municipalities in the east of the Valley of Toluca: Almoloya del Río, Atizapán, Capulhuac, Lerma, Ocoyoacac, Ocuilan, Texcalyacac, Tianguistenco and Xalatlaco. The head town was at Lerma de Villada.^[10][11]

2005–2017

The municipalities of Almoloya de Juárez, Amanalco, Donato Guerra, Ixtapan del Oro, Valle de Bravo, Villa de Allende and Villa Victoria. The head town was at Valle de Bravo.^[9][12]

1996–2005

The municipalities of Amanalco, Donato Guerra, Ixtapan del Oro, Otzoloapan, Santo Tomás, Temascaltepec, Valle de Bravo, Villa de Allende, Zacazonapan and Zinacantepec. The head town was at Valle de Bravo.^[9]

1978–1996

A portion of the municipality of Nezahualcóyotl.^[13]

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

Twenty-third federal electoral district of the State of Mexico

Election	Deputy	Party	Term	Legislature
1979	Juan Alvarado Jacco[14]		1979–1982	51st Congress
1982	Juan de Dios Salazar Salazar[15]		1982–1985	52nd Congress
1985	Juan Alvarado Jacco[16]		1985–1988	53rd Congress
1988	Enrique Riva Palacio Galicia [es][17]		1988–1991	54th Congress
1991	Jaime Serrano Cedillo[18]		1991–1994	55th Congress
1994	Virgilia Noguera Corona[19]		1994–1997	56th Congress
1997	Francisco Crescencio Rodríguez García[20]		1997–2000	57th Congress
2000	José Jaimes García[21]		2000–2003	58th Congress
2003	Víctor González Huerta[22]		2003–2006	59th Congress
2006	María Mercedes Colín Guadarrama[23]		2006–2009	60th Congress
2009	José Ignacio Pichardo Lechuga[24]		2009–2012	61st Congress
2012	Blanca Estela Gómez Carmona[25]		2012–2015	62nd Congress
2015	José Ignacio Pichardo Lechuga[26]		2015–2018	63rd Congress
2018	David Orihuela Nava[27]		2018–2021	64th Congress
2021	Martha Azucena Camacho Reynoso [es][28]		2021–2024	65th Congress
2024[29]	José Luis Hernández Pérez[30]		2024–2027	66th Congress

19°17′N 99°30′W / 19.283°N 99.500°W / 19.283; -99.500