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The 31st federal electoral district of the Federal District (Distrito electoral federal 31 del Distrito Federal) is a defunct federal electoral district of Mexico. Occupying a portion of what is today Mexico City, it was in existence from 1978 to 1996.

During that time, it returned one deputy to the Chamber of Deputies for each three-year legislative session by means of the first-past-the-post system, electing its first in the 1979 mid-terms and its last in the 1994 general election. Votes cast in the district also counted towards the calculation of proportional representation ("plurinominal") deputies elected from the country's electoral regions.

The 31st to 40th districts were abolished in the Federal Electoral Institute's 1996 redistricting process because the capital's population no longer warranted that number of seats in Congress.

District territory

The districting scheme in force from 1978 to 1996 was the result of 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 Federal District's seat allocation rose from 27 to 40. The 31st district covered a portion of the boroughs of Gustavo A. Madero and Venustiano Carranza in the north of the city.

Deputies returned to Congress

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

Thirty-first federal electoral district of the Federal District

Election	Deputy	Party	Term	Legislature
1979	Ofelia Casillas Ontiveros [es]		1979–1982	51st Congress
1982	María Luisa Calzada de Campos		1982–1985	52nd Congress
1985	Fernando Ortiz Arana		1985–1988	53rd Congress
1988	José Luis Alfonso Sampayo		1988–1991	54th Congress
1991	Manuel Jiménez Guzmán		1991–1994	55th Congress
1994	Ignacio Contreras Flores [es]		1994–1997	56th Congress

References

1. "How Mexico Elects Its Leaders — The Rules". Mexico Solidarity Project. 31 January 2024. Retrieved 4 January 2025.
2. "Circunscripciones" (PDF). ayuda.ine.mx/2021. Instituto Nacional Electoral. Retrieved 4 January 2025.
3. Baños Martínez, Marco Antonio; Palacios Mora, Celia (2014). "Evolución territorial de los distritos electorales federales uninominales, 1977–2010" [Territorial evolution of the federal uninominal electoral districts, 1977–2010]. Investigaciones Geográficas (84). Mexico City: Instituto de Geografía, UNAM: 92. doi:10.14350/rig.34063. Retrieved 4 January 2025.
4. González Casanova, Pablo (1993). Las Elecciones en México: evolución y perspectivas (3 ed.). Siglo XXI. p. 219. ISBN 9789682313219. Retrieved 4 January 2025.
5. "Distrito Federal". División del Territorio de la República en 300 Distritos Electorales Uninominales para Elecciones Federales. Diario Oficial de la Federación. 29 May 1978. p. 21. Retrieved 4 January 2025. The link contains an exact description of the district's territory.
6. "Legislatura 51" (PDF). Cámara de Diputados. Retrieved 4 January 2025.
7. "Legislatura 52" (PDF). Cámara de Diputados. Retrieved 4 January 2025.
8. "Legislatura 53" (PDF). Cámara de Diputados. Retrieved 4 January 2025.
9. "Legislatura 54" (PDF). Cámara de Diputados. Retrieved 4 January 2025.
10. "Legislatura 55" (PDF). Cámara de Diputados. Retrieved 4 January 2025.
11. "Legislatura 56" (PDF). Cámara de Diputados. Retrieved 4 January 2025.

v t e Federal electoral districts of Mexico City
	Current: 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th 12th 13th 14th 15th 16th 17th 18th 19th 20th 21st 22nd
	Defunct: 23rd 24th 25th 26th 27th 28th 29th 30th 31st 32nd 33rd 34th 35th 36th 37th 38th 39th 40th
Related topics Chamber of Deputies Congress of the Union Sessions of Congress

19°28′N 99°06′W / 19.467°N 99.100°W / 19.467; -99.100

• Former federal electoral districts of Mexico
• Mexico City