✶ LXVI Legislature · 2024–2027 · as of 4 November 2026
Five hundred deputies,
128 senators.
The Congress of the Union (Congreso de la Unión) has two chambers. The Chamber of Deputies is elected every three years: 300 members by plurality in single-member districts and 200 from regional party lists. The Senate is elected every six years: three senators per state and 32 from one national list. Each member is elected in a formula with an alternate (suplente), who takes the seat if the member leaves.
- 500deputies, term 1 Sep 2024 – 31 Aug 2027
- 254of them women
- 33alternates now sitting in the Chamber
- 128senators, term 1 Sep 2024 – 31 Aug 2030
- 64of them women
- 365deputies in the Morena, PVEM and PT groups (two-thirds is 334)
Chamber of Deputies · Cámara de Diputados
From the ballot
to the groups.
INE allocated the seats on 23 August 2024 by the party each winner was nominated for. Under the coalition agreements each district a coalition won counted for the partner the agreement named (the siglado), and many winners nominated by the PVEM or the PT were Morena members who sat with Morena: the PVEM was allocated 77 seats and formed a group of 60, Morena was allocated 236 and formed a group of 257. Groups (grupos parlamentarios) are what count in the Chamber's votes and committees.
A majority is 251 of 500. A constitutional amendment needs two thirds of those present: 334 when all 500 attend. The three governing groups hold 365, against 364 at installation. How the 200 list seats were divided, and the 8-point limit on over-representation, are on the seats page.
Change since installation Morena −3 PAN −2 PVEM +2 PT +2 MC +2 PRD −1
Allocated 23 August 2024, by nominating party
Installed 1 September 2024, by group
Wikipedia · secondary
Now 5 November 2026, by group
- Morena
- PAN
- PVEM
- PT
- PRI
- MC
- PRD
- Independent, no group
- Majority 251
- Two thirds 334
District and list seats, by group
Members by the way they were elected and the group they sit in now. MR: mayoría relativa, a single-member district. RP: representación proporcional, a list seat in one of five circunscripciones of 40 seats each.
| Group | District (MR) | List (RP) | Total | Women |
|---|---|---|---|---|
| Morena | 179 | 75 | 254 | 148 |
| PAN | 30 | 39 | 69 | 33 |
| PVEM | 41 | 21 | 62 | 24 |
| PT | 36 | 13 | 49 | 19 |
| PRI | 11 | 25 | 36 | 15 |
| MC | 2 | 27 | 29 | 14 |
| No group | 1 | 0 | 1 | 1 |
| All | 300 | 200 | 500 | 254 |
Leave, alternates and moves
The Cámara's movement reports for the legislature so far, as published on 5 November 2026.
- 85leaves of absence (licencias)
- 71members sworn in during the term, mostly alternates (tomas de protesta)
- 47returns from leave (reincorporaciones)
- 35alternates leaving when the member returned
- 31changes of parliamentary group
- 33seats now held by the elected alternate
The reports name the group a member moved to, not the one left; the composition at installation above is from a secondary source.
Senate · Cámara de Senadores
Three per state,
32 from the nation.
In each state the party or coalition with most votes wins two seats (its two-person formula) and the runner-up's first candidate takes the third, the first-minority seat (primera minoría). The other 32 come from national lists in proportion to the national vote (CPEUM art. 56). The 2024 Senate sits until 2030.
A majority is 65 of 128; two thirds of a full chamber is 86. Morena, the PVEM and the PT hold 86.
Change since installation PAN −1 PVEM +1 PRI −2 MC +1 No group +1
The Senate's own site (senado.gob.mx) refuses automated clients, so the senators' roster and groups here are from the Spanish Wikipedia annex on the LXVI Legislature (secondary), checked against INE's allocation. Gender is from Wikidata; for 26 senators without an entry it is read from the given name.
Allocated 23 August 2024, by nominating party
Installed 1 September 2024, by group
Wikipedia · secondary
Now 5 November 2026, by group
Wikipedia (es), LXVI annex · secondary
- Morena
- PAN
- PVEM
- PT
- PRI
- MC
- PRD
- Independent, no group
- Majority 65
- Two thirds 86
Seats by type and group
| Group | Majority | First minority | National list | Total | Women |
|---|---|---|---|---|---|
| Morena | 46 | 7 | 13 | 66 | 33 |
| PAN | 4 | 11 | 6 | 21 | 11 |
| PVEM | 10 | 1 | 3 | 14 | 7 |
| PRI | 0 | 9 | 4 | 13 | 7 |
| PT | 3 | 0 | 3 | 6 | 4 |
| MC | 0 | 3 | 3 | 6 | 2 |
| No group | 1 | 1 | 0 | 2 | 0 |
| All | 64 | 32 | 32 | 128 | 64 |
27 senators now sitting are elected alternates.
Consecutive re-election
One more term,
then none.
From 1933 no federal legislator could serve two terms in a row. The 2014 political reform (DOF 10 February 2014) allowed consecutive terms from the 2018 election: deputies up to four terms in a row and senators up to two, nominated by the same party or coalition unless they left it before mid-term.
The reform of 1 April 2025 restores the ban in article 59: senators and deputies "no podrán ser reelectas para el periodo inmediato". Its third transitory article applies the ban from the 2030 elections, and bars anyone holding those offices in 2030 from standing for re-election. Deputies elected in 2024 can therefore seek one consecutive term on 6 June 2027; senators elected in 2024 sit until 2030 and cannot. The Cámara's profiles do not record which members were themselves re-elected, so that is not shown here.
DOF 01-04-2025 — no reelección y nepotismo electoral (arts. 55, 59, 82, 115, 116, 122) ↗
All 628 members
Find a
legislator.
Deputies link to their official profile on the Cámara's legislative information system (SITL); senators to the secondary source. Districts are those of INE's 2023 map; the list seats name their circunscripción.
No member matches.
109 of 628 with a photo; the rest show initials rather than risk a wrong face.