{
  "data": {
    "id": "mexico-legislative-2027",
    "country": "MX",
    "country_name": "Mexico",
    "date": "2027-06-06",
    "date_status": "declared",
    "kind": "legislative",
    "conditional": null,
    "timezone": "America/Mexico_City",
    "status": "scheduled",
    "last_verified_at": "2026-09-25T09:26:31Z",
    "stale": false,
    "stale_reason": null,
    "provenance": {
      "from": "researcher agent 2026-09-25: INE/CG479/2026 Plan Integral y Calendario PEF 2026-2027 (annex 1); ine.mx Elecciones 2027 page; LGIPE (Cámara compilation, last reform DOF 02-06-2026; arts. 44.1(u), 310.1, 311.4 and 327.2 carry an SCJN note that the 2 Mar 2023 rewording was invalidated and the earlier text restored, so the quoted wording is to be re-checked against the restored text) arts. 22, 44, 219, 285, 310-312, 327; LGSMIME (DOF 14-11-2025) arts. 58, 69; Reglamento de Elecciones (Sept 2026 compilation) art. 353; INE/CG2129/2024; Excélsior 1 Jun 2026 on the judicial election moving to 2028",
      "licence": "CC BY 4.0 (Election Index)"
    },
    "url": "https://electionindex.org/election/mexico-legislative-2027",
    "races": [
      {
        "id": "chamber",
        "key": "mexico-legislative-2027/chamber",
        "name": "Chamber of Deputies",
        "body": "legislature-lower",
        "seats": 500,
        "polls_close_utc": "2027-06-07T01:00:00Z",
        "authority": {
          "id": "mx-ine",
          "name": "National Electoral Institute",
          "name_local": "Instituto Nacional Electoral",
          "role": "electoral-commission",
          "homepage": "https://ine.mx/",
          "results_index": "https://ine.mx/voto-y-elecciones/resultados-electorales/",
          "open_data": "https://www.ine.mx/transparencia/datos-abiertos/"
        },
        "status": "scheduled",
        "expected_stage_now": null,
        "observed": false,
        "final_observed": null,
        "final_expected": {
          "from": "2027-08-04T06:00:00Z",
          "by": "2027-08-25T05:59:59Z",
          "confidence": "announced",
          "basis": "The INE Consejo General makes the total count, declares the PR election valid and assigns the 200 PR seats 'a más tardar el 23 de agosto del año de la elección' (LGIPE art. 44.1(u)). Under art. 327 this comes after the Tribunal Electoral has resolved the challenges; district-count challenges (juicios de inconformidad) must be decided by 3 Aug (LGSMIME art. 58.1). INE/CG479/2026 row 653: the PR count/validity/assignment agreements, 1-23 Aug 2027. Precedent: INE/CG2129/2024, dated 23 Aug 2024 (vote 2 Jun 2024; INE document repository, handle 123456789/176370). The window opens on 4 Aug. To err late, it runs to the end of 24 Aug (CDMX time), in case the 23 Aug session runs past midnight. The PREP or the June district counts are not the final result."
        },
        "stages": [
          {
            "stage": "election-night",
            "from": "2027-06-07T02:00:00Z",
            "by": "2027-06-08T02:00:00Z",
            "replacedAt": null,
            "confidence": "announced",
            "citation": "LGIPE art. 285.1: 'La votación se cerrará a las 18:00 horas' (local time). The last polls close in the UTC-7 zones (Baja California, Sonora, Pacific), at 01:00 UTC. Reglamento de Elecciones art. 353.4(a): the federal PREP 'podrá iniciar a partir de las 20:00 horas, tiempo del centro' (02:00 UTC), and it closes 'en un plazo de veinticuatro horas' after it opens (02:00 UTC on 8 Jun). It may close earlier once every PREP acta is recorded (art. 353.6). INE/CG479/2026 row 546: PREP in production 6-7 Jun 2027. INE's quick count (conteo rápido, row 544) is a statistical estimate, not a count. The PREP is not replaced on its own page: the official district counts are published on a separate cómputos site.",
            "source": null,
            "observedAt": null,
            "observedSource": null
          },
          {
            "stage": "intermediate-count",
            "from": "2027-06-09T14:00:00Z",
            "by": "2027-06-14T05:59:59Z",
            "replacedAt": null,
            "confidence": "announced",
            "citation": "LGIPE art. 310.1: the district councils meet 'a partir de las 8:00 horas del miércoles siguiente al día de la jornada electoral' (Wed 9 Jun 2027, 14:00 UTC). Art. 311.4 requires a total recount to 'concluya antes del domingo siguiente al de la jornada electoral'. INE/CG479/2026: district-count sessions 9-11 Jun 2027 (row 980); PR count per circunscripción 13 Jun 2027 (row 981). Under art. 312.1 each district council declares validity and issues the majority certificate for its seat. These are official counts for the 300 district seats, but not the Chamber's final result: the 200 PR seats are assigned later. The window closes at the end of Sun 13 Jun (CDMX time).",
            "source": null,
            "observedAt": null,
            "observedSource": null
          },
          {
            "stage": "final-result",
            "from": "2027-08-04T06:00:00Z",
            "by": "2027-08-25T05:59:59Z",
            "replacedAt": null,
            "confidence": "announced",
            "citation": "The INE Consejo General makes the total count, declares the PR election valid and assigns the 200 PR seats 'a más tardar el 23 de agosto del año de la elección' (LGIPE art. 44.1(u)). Under art. 327 this comes after the Tribunal Electoral has resolved the challenges; district-count challenges (juicios de inconformidad) must be decided by 3 Aug (LGSMIME art. 58.1). INE/CG479/2026 row 653: the PR count/validity/assignment agreements, 1-23 Aug 2027. Precedent: INE/CG2129/2024, dated 23 Aug 2024 (vote 2 Jun 2024; INE document repository, handle 123456789/176370). The window opens on 4 Aug. To err late, it runs to the end of 24 Aug (CDMX time), in case the 23 Aug session runs past midnight. The PREP or the June district counts are not the final result.",
            "source": null,
            "observedAt": null,
            "observedSource": null
          },
          {
            "stage": "court-validation",
            "from": "2027-08-04T06:00:00Z",
            "by": "2027-09-01T05:59:59Z",
            "replacedAt": null,
            "confidence": "announced",
            "citation": "TEPJF (Tribunal Electoral del Poder Judicial de la Federación). LGSMIME art. 58.1: juicios de inconformidad on the deputies' election 'deberán quedar resueltos el día 3 de agosto'. Art. 69.1: recursos de reconsideración on the district counts by 19 Aug; the others, including challenges to the PR assignment, 'a más tardar tres días antes al en que se instalen las Cámaras del Congreso de la Unión'. The new Congress's first ordinary session opens on 1 Sep (Constitution art. 65, not re-read for this profile), so the window closes at the end of 31 Aug (CDMX time). The Sala Superior's rulings are final ('definitivas e inatacables', art. 69.2).",
            "source": null,
            "observedAt": null,
            "observedSource": null
          }
        ],
        "sources": [
          {
            "url": "https://ine.mx/voto-y-elecciones/prep/",
            "role": "results-live",
            "kind": "results_index",
            "kindReason": "results section without an election code",
            "resolvable": false,
            "origin": "race",
            "note": "INE's PREP (preliminary results) index. It lists one host per election: in 2024 https://prep2024.ine.mx/publicacion/nacional/landing, in 2021 prep2021.ine.mx. No 2027 host existed on 25 Sep 2026 (prep2027.ine.mx did not resolve), so do not guess one. Add the single-election PREP URL when INE links it. The PREP is preliminary and informative only (LGIPE art. 219.1).",
            "check": null
          },
          {
            "url": "https://ine.mx/voto-y-elecciones/computos-distritales/",
            "role": "results-final",
            "kind": "results_index",
            "kindReason": "results section without an election code",
            "resolvable": false,
            "origin": "race",
            "note": "INE's index of district-count (cómputos distritales) sites: computos2024.ine.mx, computos2021.ine.mx and older. The official count lives there, on a separate host from the PREP. The calendar schedules the 'Sistema de Cómputos Web' for release on 8 Jun 2027 (INE/CG479/2026, row 548). A 2027 host did not resolve on 25 Sep 2026. Add the single-election URL when INE links it.",
            "check": null
          },
          {
            "url": "https://repositoriodocumental.ine.mx/xmlui/bitstream/handle/123456789/189398/CGex202607-30-ap-3-a1.xlsx",
            "role": "timetable",
            "kind": "feed",
            "kindReason": "machine-readable file",
            "resolvable": true,
            "origin": "race",
            "note": "Annex 1 to INE/CG479/2026 (30 Jul 2026): Plan Integral y Calendario del Proceso Electoral Federal 2026-2027. Rows cited by ID in the stage citations. Agreement text: https://repositoriodocumental.ine.mx/xmlui/bitstream/handle/123456789/189398/CGex202607-30-ap-3-Gaceta.pdf",
            "check": null
          },
          {
            "url": "https://ine.mx/voto-y-elecciones/elecciones-2027/",
            "role": "timetable",
            "kind": "other",
            "kindReason": "election page without a results marker",
            "resolvable": false,
            "origin": "race",
            "note": "INE's page for the 2026-2027 federal process: 'La Jornada Electoral se llevará a cabo el 6 de junio de 2027'. Federally only the 500 deputies (300 by majority, 200 by proportional representation) are elected. The concurrent state races are organised by the local bodies (OPLEs) and are not covered here. The federal judicial election that the 2024 reform set for 2027 was moved to June 2028 by a constitutional amendment, declared valid by the Comisión Permanente (Excélsior, 1 Jun 2026).",
            "check": null
          },
          {
            "url": "https://en.wikipedia.org/wiki/2027_Mexican_legislative_election",
            "role": "see-also",
            "kind": "other",
            "kindReason": "election page without a results marker",
            "resolvable": false,
            "origin": "race",
            "check": null
          },
          {
            "url": "https://ine.mx/voto-y-elecciones/resultados-electorales/",
            "role": "results-index",
            "kind": "results_index",
            "kindReason": "results section without an election code",
            "resolvable": false,
            "origin": "authority",
            "check": null
          },
          {
            "url": "https://www.ine.mx/transparencia/datos-abiertos/",
            "role": "open-data",
            "kind": "other",
            "kindReason": "no election or results marker",
            "resolvable": false,
            "origin": "authority",
            "check": null
          },
          {
            "url": "https://ine.mx/",
            "role": "authority-home",
            "kind": "emb_home",
            "kindReason": "site root: cannot answer a results question",
            "resolvable": false,
            "origin": "authority",
            "check": null
          }
        ],
        "page_activity": [],
        "government": null,
        "url": "https://electionindex.org/election/mexico-legislative-2027#chamber"
      }
    ]
  },
  "meta": {
    "dataset_version": "2026-09-25.b5bc58a8",
    "built_at": "2026-09-25T10:56:15Z",
    "generated_at": "2026-09-25T11:22:45.559Z",
    "licence": "CC BY 4.0: credit \"Election Index (electionindex.org)\" and link to https://electionindex.org",
    "docs": "https://electionindex.org/docs"
  }
}