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Partial researchResearch snapshot 2026-09-13. Evidence gaps remain; see Coverage for requirements.

Office briefing

TAPALAPA — Municipal government

Tracked current office. Identifiers stay separate from display names.

Mexico · TAPALAPA / CHIAPAS · municipal · Municipal governmentMX-M-7-91

Read the complete original research briefing

INE result distributions kept separate. Certified seats, supplementary elections, coalition and boundary audit remain.

1. What office, where, and when is the next election?

Geography
TAPALAPA / CHIAPAS
Next election
2027-06-06
Linked upcoming event
next-4591325e5bcd0589d29f31da
Registry qualification
Unknown

2. How certain is that date?

2027-06-06 is expected (not formally called). Day precision. A date without a formal call is not confirmed.

3. Who won earlier selected elections?

2024

Special · Legal certification not established · candidate marks

  • MORENA49.8%
  • PAN_PRI_PRD49.0%
  • PT0.1%
  • RSP0.1%
  • PMCH0.0%
  • PVEM0.0%
  • PPCH0.0%
Results for event-7d65bccff12b97c3c06dfe00
Label / candidateParty codeVotesShareSeatsStatus
MORENAmexico/Sf51ea5b628/20241,40049.8%UnknownRecorded
PAN_PRI_PRDmexico/Sf51ea5b628/20241,37849%UnknownRecorded
PTmexico/Sf51ea5b628/202420.1%UnknownRecorded
RSPmexico/Sf51ea5b628/202420.1%UnknownRecorded
PMCHmexico/Sf51ea5b628/202410%UnknownRecorded
PVEMmexico/Sf51ea5b628/20240 (recorded zero)0% (recorded zero)UnknownRecorded
PPCHmexico/Sf51ea5b628/20240 (recorded zero)0% (recorded zero)UnknownRecorded

2021

Special · Legal certification not established · candidate marks

  • PRD51.0%
  • PRI45.0%
  • MORENA1.9%
  • PES0.2%
  • RSP0.1%
  • PMCH0.1%
  • PAN0.0%
  • PVEM0.0%
  • PT0.0%
  • MC0.0%
  • FXM0.0%
  • PCHU0.0%
  • PNA0.0%
  • PPCH0.0%
  • CAND_IND10.0%
  • CAND_IND20.0%
  • CAND_IND30.0%
  • CAND_IND40.0%
  • CAND_IND50.0%
  • CAND_IND60.0%
  • CAND_IND70.0%
  • CAND_IND80.0%
  • CAND_IND90.0%
  • CAND_IND100.0%
  • PAN_PRI_PRD0.0%
Results for event-eb422ea2e6c2be8b783dc44b
Label / candidateParty codeVotesShareSeatsStatus
PRDmexico/S4cf9a9a5fd/20211,58651%UnknownRecorded
PRImexico/S4cf9a9a5fd/20211,40145%UnknownRecorded
MORENAmexico/S4cf9a9a5fd/2021581.9%UnknownRecorded
PESmexico/S4cf9a9a5fd/202150.2%UnknownRecorded
RSPmexico/S4cf9a9a5fd/202130.1%UnknownRecorded
PMCHmexico/S4cf9a9a5fd/202120.1%UnknownRecorded
PANmexico/S4cf9a9a5fd/202110%UnknownRecorded
PVEMmexico/S4cf9a9a5fd/202110%UnknownRecorded
PTmexico/S4cf9a9a5fd/20210 (recorded zero)0% (recorded zero)UnknownRecorded
MCmexico/S4cf9a9a5fd/20210 (recorded zero)0% (recorded zero)UnknownRecorded
FXMmexico/S4cf9a9a5fd/20210 (recorded zero)0% (recorded zero)UnknownRecorded
PCHUmexico/S4cf9a9a5fd/20210 (recorded zero)0% (recorded zero)UnknownRecorded
PNAmexico/S4cf9a9a5fd/20210 (recorded zero)0% (recorded zero)UnknownRecorded
PPCHmexico/S4cf9a9a5fd/20210 (recorded zero)0% (recorded zero)UnknownRecorded
CAND_IND1mexico/S4cf9a9a5fd/20210 (recorded zero)0% (recorded zero)UnknownRecorded
CAND_IND2mexico/S4cf9a9a5fd/20210 (recorded zero)0% (recorded zero)UnknownRecorded
CAND_IND3mexico/S4cf9a9a5fd/20210 (recorded zero)0% (recorded zero)UnknownRecorded
CAND_IND4mexico/S4cf9a9a5fd/20210 (recorded zero)0% (recorded zero)UnknownRecorded
CAND_IND5mexico/S4cf9a9a5fd/20210 (recorded zero)0% (recorded zero)UnknownRecorded
CAND_IND6mexico/S4cf9a9a5fd/20210 (recorded zero)0% (recorded zero)UnknownRecorded
CAND_IND7mexico/S4cf9a9a5fd/20210 (recorded zero)0% (recorded zero)UnknownRecorded
CAND_IND8mexico/S4cf9a9a5fd/20210 (recorded zero)0% (recorded zero)UnknownRecorded
CAND_IND9mexico/S4cf9a9a5fd/20210 (recorded zero)0% (recorded zero)UnknownRecorded
CAND_IND10mexico/S4cf9a9a5fd/20210 (recorded zero)0% (recorded zero)UnknownRecorded
PAN_PRI_PRDmexico/S4cf9a9a5fd/20210 (recorded zero)0% (recorded zero)UnknownRecorded

2018

Special · Legal certification not established · candidate marks

  • PRI26.9%
  • PRD23.4%
  • PCU8.1%
  • PT_MORENA_ES1.1%
  • PVEM0.2%
  • MVC0.1%
Results for event-85bb93ce87a6b7773f5aa7f0
Label / candidateParty codeVotesShareSeatsStatus
PRImexico/Sc8115d679e/20181,21026.9%UnknownRecorded
PRDmexico/Sc8115d679e/20181,05123.4%UnknownRecorded
PCUmexico/Sc8115d679e/20183628.1%UnknownRecorded
PT_MORENA_ESmexico/Sc8115d679e/2018481.1%UnknownRecorded
PVEMmexico/Sc8115d679e/201890.2%UnknownRecorded
MVCmexico/Sc8115d679e/201830.1%UnknownRecorded

4. Competition and volatility

competition index

Provisional imported-series CI

85.590–100 historical closeness

Actual-event and/or comparability review incomplete

Comparison status: Provisional imported-series comparison; actual-event review open

Method ci.weighted-gap.v1. Inputs: latest_gap=0.7905138339920939, oldest_gap=5.926202012672384, previous_gap=6.051684658161591

pedersen volatility

Provisional volatility

97.78percentage points

Grouped Pedersen lower bound (percentage points). Seven exact standalone INE party labels. Joint coalition combinations, independents and other parties remain Other, without allocating coalition votes. This coarse grouped comparison can conceal coalition-member shifts and requires the stated geographic/event review. An interval is withheld if either election has no list mapped to an explicit named group. This is aggregate share change, not individual voter switching. Event review: Actual-event and/or comparability review incomplete

Comparison status: Latest interval

Method pedersen.grouped.v1. Inputs: groups=["PAN","PRI","PRD","PT","PVEM","MC","MORENA","Other"], interval=Latest interval, vectors=[[0,0,0,0.07186489399928135,0,0,50.305425799496945,49.62270930650377],[0.03271180896303565,45.82924435721296,51.88092901537455,0,0.03271180896303565,0,1.897284919856068,0.32711808963035655],[0,45.09877003354454,39.172568020872156,0,0.3354453969437197,0,0,15.393216548639584]]

pedersen volatility

Provisional volatility

15.37percentage points

Grouped Pedersen lower bound (percentage points). Seven exact standalone INE party labels. Joint coalition combinations, independents and other parties remain Other, without allocating coalition votes. This coarse grouped comparison can conceal coalition-member shifts and requires the stated geographic/event review. An interval is withheld if either election has no list mapped to an explicit named group. This is aggregate share change, not individual voter switching. Event review: Actual-event and/or comparability review incomplete

Comparison status: Previous interval

Method pedersen.grouped.v1. Inputs: groups=["PAN","PRI","PRD","PT","PVEM","MC","MORENA","Other"], interval=Previous interval, vectors=[[0,0,0,0.07186489399928135,0,0,50.305425799496945,49.62270930650377],[0.03271180896303565,45.82924435721296,51.88092901537455,0,0.03271180896303565,0,1.897284919856068,0.32711808963035655],[0,45.09877003354454,39.172568020872156,0,0.3354453969437197,0,0,15.393216548639584]]

pedersen volatility

Provisional volatility

56.57percentage points

Grouped Pedersen lower bound (percentage points). Seven exact standalone INE party labels. Joint coalition combinations, independents and other parties remain Other, without allocating coalition votes. This coarse grouped comparison can conceal coalition-member shifts and requires the stated geographic/event review. An interval is withheld if either election has no list mapped to an explicit named group. This is aggregate share change, not individual voter switching. Event review: Actual-event and/or comparability review incomplete

Comparison status: Both intervals mean

Method pedersen.grouped.v1. Inputs: groups=["PAN","PRI","PRD","PT","PVEM","MC","MORENA","Other"], interval=Both intervals mean, vectors=[[0,0,0,0.07186489399928135,0,0,50.305425799496945,49.62270930650377],[0.03271180896303565,45.82924435721296,51.88092901537455,0,0.03271180896303565,0,1.897284919856068,0.32711808963035655],[0,45.09877003354454,39.172568020872156,0,0.3354453969437197,0,0,15.393216548639584]]

Source-reported control: Unverified. Current tenure requires separate dated evidence.

5. Officeholder evidence

Dated roster observations are not automatically current tenure. The source current-office flag means this office is tracked now, not that the last winner still holds it.

No officeholder observation supplied.

6. Polling context

No local poll supplied.

7. Unresolved issues and sources

No open research issues attached to this office.

Sources

Cite this record

Center for Digital Democracy. “TAPALAPA — Municipal government.” Subnational Election Observatory, releaselatin-america-fe5e91689def, snapshot 2026-09-13. /electiondatabase/offices/MX-M-7-91. Sources: mexico--url-3635e08ffbefd711526cbeea, mexico--Sf51ea5b628, mexico--S4cf9a9a5fd, mexico--Sc8115d679e.