Opposition (136)

•   PAN (71)
•   PRI (37)
•   MC (27)
•   IND (1)

3 yearsElectionsParallel voting
300 seats elected by first-past-the-post
200 seats elected by proportional representation (largest remainder method)2 June 2024 (2024-06-02)6 June 2027 (2027-06-06)Meeting placeChamber of Deputies
San Lázaro Legislative Building
Mexico City
MexicoWebsiteweb.diputados.gob.mxFootnotesDeputies 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.

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

The Chamber of Deputies is composed of 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 share of the vote in the corresponding circunscripción. The 200 plurinominal deputies are intended to counterbalance the sectional interests of the district-based deputies. Substitutes are elected at the same time as each deputy, so special elections are rare.

From 1917 to 2015, deputies were barred from serving consecutive terms in accordance with 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 elections, and deputies are now permitted to run for re-election three times consecutively. A deputy who has served two terms may serve again after sitting out one term. 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:

Party		Single-member districts	Proportional representation	Total seats
	MRN	176	77	253
	PAN	31	40	71
	PVEM	44	18	62
	PT	36	13	49
	PRI	11	26	37
	MC	1	26	27
	No party	1	–	1
Total		300	200	500

Party		District			Proportional			Total seats	+/–
		Votes	%	Seats	Votes	%	Seats
	MORENA–PT–PVEM	12,802,391	26.19	65	21,025,742	42.77	214	279	–
	PAN–PRI–PRD	12,575,879	25.73	63	19,477,887	39.62	153	216	–
	National Regeneration Movement	6,571,127	13.45	64	16,759,917	34.10	133	197	+8
	National Action Party	3,828,228	7.83	33	8,969,288	18.25	78	111	+28
	Institutional Revolutionary Party	2,715,123	5.56	11	8,715,899	17.73	58	69	+24
	Party of the Democratic Revolution	248,505	0.51	0	1,792,700	3.64	17	17	-4
	Ecologist Green Party	992,320	2.03	1	2,670,997	5.43	43	44	+28
	Citizens' Movement	3,430,507	7.02	7	3,449,982	7.02	18	25	-2
	Labor Party	538,832	1.10	0	1,594,828	3.24	38	38	-23
	Solidarity Encounter Party	1,345,858	2.75	0	1,352,544	2.75	0	0	-8
	Force for Mexico	1,211,824	2.48	0	1,217,084	2.48	0	0	0
	Progressive Social Networks	865,215	1.77	0	868,515	1.77	0	0	0
	Independents	44,311	0.09	0	44,311	0.09	0	0	0
Invalid/blank votes		1,662,323	3.40	–			–	–	–
Total		48,874,040	100	300		100	200	500	0
Registered voters/turnout				–			–	–	–
Source: INE

Of the 210 seats won by the MORENA-PT–PES alliance, 97 were taken by MORENA, 57 by the PT, and 56 by the PES

Of the 63 seats won by the PAN–PRD–MC alliance, 37 were taken by the PAN, 17 by the MC, and 9 by the PRD

Of the 13 seats won by the PRI–PVEM–PNA alliance, 6 were taken by the PRI, 5 by the PVEM, and 2 by the PNA

Popular Vote - District MORENA   13.44% PAN   7.83% MC   7.01% PRI   5.55% PES   2.75% PVEM   2.03% RSP   1.77% PT   1.10% PRD   0.50% Independents   0.09%

Popular Vote (alliances) - District JHH   26.19% VPM   25.73% Independents   0.09%

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

• Official website (in Spanish)

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