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Chamber of Deputies Cámara de Diputados
LXVI Legislature
Type
Type	Lower house of the Congress of Mexico
Term limits	Up to four consecutive terms; no limit to non-consecutive terms
History
Founded	4 October 1824 (1824-10-04)
Leadership
President	Sergio Gutiérrez Luna (Morena) since 7 October 2024
Structure
Seats	500
Political groups	Government (364)   Morena (253)   PVEM (62)   PT (49) Opposition (136)   PAN (71)   PRI (37)   MC (27)   Independent (1)
Length of term	3 years
Elections
Voting system	Parallel voting 300 seats elected by first-past-the-post 200 seats elected by proportional representation (largest remainder method)
Last election	2 June 2024 (2024-06-02)
Next election	6 June 2027 (2027-06-06)
Meeting place
Chamber of Deputies San Lázaro Legislative Building Mexico City Mexico
Website
web.diputados.gob.mx
Footnotes
Deputies information

The Chamber of Deputies (Spanish: Cámara de Diputados, pronounced [ˈkamaɾa ðe ðipuˈtaðos]) is the lower house of the Congress of the Union, the bicameral parliament of Mexico. The other chamber is the Senate. The structure and responsibilities of both chambers of Congress are defined in Articles 50 to 70 of the Constitution.

History

A bicameral legislature, including the Chamber of Deputies, was established on 4 October 1824. A unicameral congress existed from 7 September 1857 to 13 November 1874.

Composition

The Chamber of Deputies comprises one federal deputy (in Spanish: diputado federal) for approximately every 250,000 citizens. The Chamber has 500 members, elected using the parallel voting system. Elections are held every three years.

Of these, 300 "majority deputies" are directly elected by plurality from single-member districts, known as federal electoral districts (with each state divided into at least two districts). The remaining 200 "plurinominal deputies" are assigned through rules of proportional representation in five multi-state, 40-seat electoral regions (circunscripciones). These seats are not tied to districts; rather, they are allocated to the parties based on each party's vote in the corresponding circunscripción. The 200 plurinominal deputies are intended to counterbalance the sectional interests of the district-based deputies. Substitutes are elected simultaneously with each deputy, so special elections are rare.

From 1917 to 2015, deputies were barred from serving consecutive terms per the constitutional ban on immediate re-election to the legislature. Thus, the Chamber of Deputies was one of the few legislative bodies in the world that was completely renewed at an election. However, this changed with the 2018 election, and deputies can now run for re-election three times consecutively. Congressional elections held halfway into the six-year presidential mandate are known as mid-term elections.

The current composition of the Chamber of Deputies is as follows:

Last election

Party or alliance				Constituency			Party-list			Total seats	+/–
				Votes	%	Seats	Votes	%	Seats
	Sigamos Haciendo Historia		National Regeneration Movement	3,686,979	6.48	37	24,286,317	42.40	75	236	+38
			Ecologist Green Party of Mexico	676,092	1.19	0	4,993,988	8.72	20	77	+34
			Labor Party	507,604	0.89	0	3,254,718	5.68	13	51	+14
			Common candidates	27,446,014	48.26	219				–	–
		Total		32,316,689	56.82	256	32,535,023	56.80	108	364	+86
	Fuerza y Corazón por México		National Action Party	372,670	0.66	3	10,049,375	17.55	40	72	–42
			Institutional Revolutionary Party	101,574	0.18	0	6,623,796	11.56	26	35	–35
			Party of the Democratic Revolution	20,374	0.04	0	1,449,660	2.53	0	1	–14
			Common candidates	17,493,425	30.76	39				–	–
		Total		17,988,043	31.63	42	18,122,831	31.64	66	108	–91
	Citizens' Movement			6,446,537	11.34	1	6,497,404	11.34	26	27	+4
	Independents			72,012	0.13	1	72,012	0.13	0	1	+1
Non-registered candidates				48,871	0.09	0	49,329	0.09	0	0	0
Total				56,872,152	100.00	300	57,276,599	100.00	200	500	0
Valid votes				56,872,152	96.34		57,276,599	96.32
Invalid/blank votes				2,162,171	3.66		2,189,869	3.68
Total votes				59,034,323	100.00		59,466,468	100.00
Source: INE (PR)

See also

• President of the Chamber of Deputies
• Congress of the Union
• Senate of the Republic
• Politics of Mexico
• Electoral regions of Mexico

References

1. "Mexico: Democratization Through Electoral Reform". aceproject.org. Retrieved 6 July 2019.
2. "Cāmara" (PDF). September 2012. Retrieved 19 February 2022.

Notes

1. Of the elected candidates, 124 belong to the National Regeneration Movement, 57 to the Ecologist Green Party of Mexico, and 38 to the Labor Party.
2. Of the elected candidates, 29 belong to the National Action Party, 9 to the Institutional Revolutionary Party, and 1 to the Party of the Democratic Revolution.

External links

• Official website (in Spanish)

19°25′48″N 99°07′04″W / 19.43000°N 99.11778°W / 19.43000; -99.11778

• 1824 establishments in Mexico
• Congress of the Union
• National lower houses