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

Office briefing

VILLA DE TAMAZULAPAM DEL PROGRESO — Municipal government

Tracked current office. Identifiers stay separate from display names.

Mexico · VILLA DE TAMAZULAPAM DEL PROGRESO / OAXACA · municipal · Municipal governmentMX-M-20-539

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
VILLA DE TAMAZULAPAM DEL PROGRESO / OAXACA
Next election
2027-06-06
Linked upcoming event
next-e7e1a6c660950d686902c94f
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

  • FXMO45.1%
  • MORENA38.5%
  • MUJER5.4%
  • PRI2.0%
  • NAO1.9%
  • PT1.6%
  • PUP0.8%
  • C_PT_PUP_10.0%
Results for event-6c615d83c1470ab0af1a4034
Label / candidateParty codeVotesShareSeatsStatus
FXMOmexico/Sf19ab14972/20241,92345.1%UnknownRecorded
MORENAmexico/Sf19ab14972/20241,64338.5%UnknownRecorded
MUJERmexico/Sf19ab14972/20242315.4%UnknownRecorded
PRImexico/Sf19ab14972/2024852%UnknownRecorded
NAOmexico/Sf19ab14972/2024811.9%UnknownRecorded
PTmexico/Sf19ab14972/2024701.6%UnknownRecorded
PUPmexico/Sf19ab14972/2024330.8%UnknownRecorded
C_PT_PUP_1mexico/Sf19ab14972/202420%UnknownRecorded

2021

Special · Legal certification not established · candidate marks

  • PT35.2%
  • MORENA21.4%
  • PAN_PRI_PRD11.2%
  • FXM10.6%
  • PUP9.3%
  • CAND_IND16.1%
  • NAO2.9%
  • MC0.4%
  • PVEM0.3%
  • PES0.3%
Results for event-b2dbb17eb6fbc26bb219d423
Label / candidateParty codeVotesShareSeatsStatus
PTmexico/S1b79382e70/20211,51035.2%UnknownRecorded
MORENAmexico/S1b79382e70/202191621.4%UnknownRecorded
PAN_PRI_PRDmexico/S1b79382e70/202148111.2%UnknownRecorded
FXMmexico/S1b79382e70/202145410.6%UnknownRecorded
PUPmexico/S1b79382e70/20214009.3%UnknownRecorded
CAND_IND1mexico/S1b79382e70/20212626.1%UnknownRecorded
NAOmexico/S1b79382e70/20211242.9%UnknownRecorded
MCmexico/S1b79382e70/2021160.4%UnknownRecorded
PVEMmexico/S1b79382e70/2021150.3%UnknownRecorded
PESmexico/S1b79382e70/2021130.3%UnknownRecorded

2018

Special · Legal certification not established · candidate marks

  • PRI32.2%
  • PMR24.4%
  • PT_MORENA_ES23.6%
  • PAN_PRD_MC15.1%
  • PUP0.8%
  • PANAL0.5%
Results for event-ea8ca882c231bc12f1051dba
Label / candidateParty codeVotesShareSeatsStatus
PRImexico/Sa3434a45de/20181,31232.2%UnknownRecorded
PMRmexico/Sa3434a45de/201899524.4%UnknownRecorded
PT_MORENA_ESmexico/Sa3434a45de/201896323.6%UnknownRecorded
PAN_PRD_MCmexico/Sa3434a45de/201861415.1%UnknownRecorded
PUPmexico/Sa3434a45de/2018330.8%UnknownRecorded
PANALmexico/Sa3434a45de/2018200.5%UnknownRecorded

4. Competition and volatility

competition index

Provisional imported-series CI

54.070–100 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=6.882989183874145, oldest_gap=8.05181610363221, previous_gap=14.173228346456689

pedersen volatility

Provisional volatility

35.05percentage 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=[[0,2.089478859390364,0,1.7207472959685348,0,0,40.388397246804324,55.80137659783678],[0,0,0,36.02958721068957,0.35790980672870437,0.38177046051061797,21.85635886423288,41.37437365783823],[0,33.3248666497333,0,0,0,0,0,66.6751333502667]]

pedersen volatility

Provisional volatility

58.63percentage 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=[[0,2.089478859390364,0,1.7207472959685348,0,0,40.388397246804324,55.80137659783678],[0,0,0,36.02958721068957,0.35790980672870437,0.38177046051061797,21.85635886423288,41.37437365783823],[0,33.3248666497333,0,0,0,0,0,66.6751333502667]]

pedersen volatility

Provisional volatility

46.84percentage 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=[[0,2.089478859390364,0,1.7207472959685348,0,0,40.388397246804324,55.80137659783678],[0,0,0,36.02958721068957,0.35790980672870437,0.38177046051061797,21.85635886423288,41.37437365783823],[0,33.3248666497333,0,0,0,0,0,66.6751333502667]]

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. “VILLA DE TAMAZULAPAM DEL PROGRESO — Municipal government.” Subnational Election Observatory, releaselatin-america-fe5e91689def, snapshot 2026-09-13. /electiondatabase/offices/MX-M-20-539. Sources: mexico--url-3635e08ffbefd711526cbeea, mexico--Sf19ab14972, mexico--S1b79382e70, mexico--Sa3434a45de.