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

Office briefing

SANTO DOMINGO TEHUANTEPEC — Municipal government

Tracked current office. Identifiers stay separate from display names.

Mexico · SANTO DOMINGO TEHUANTEPEC / OAXACA · municipal · Municipal governmentMX-M-20-515

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
SANTO DOMINGO TEHUANTEPEC / OAXACA
Next election
2027-06-06
Linked upcoming event
next-537c1c670544b67b39cd58bf
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

  • C_PVEM_MORENA_267.3%
  • PT13.5%
  • PRI7.5%
  • MC4.2%
  • PUP1.6%
  • PAN0.7%
  • MUJER0.6%
  • NAO0.3%
  • PRD0.3%
Results for event-c9261423b4146e85f8ffa9b6
Label / candidateParty codeVotesShareSeatsStatus
C_PVEM_MORENA_2mexico/Sa931f618fd/202422,02967.3%UnknownRecorded
PTmexico/Sa931f618fd/20244,41113.5%UnknownRecorded
PRImexico/Sa931f618fd/20242,4447.5%UnknownRecorded
MCmexico/Sa931f618fd/20241,3734.2%UnknownRecorded
PUPmexico/Sa931f618fd/20245141.6%UnknownRecorded
PANmexico/Sa931f618fd/20242240.7%UnknownRecorded
MUJERmexico/Sa931f618fd/20242060.6%UnknownRecorded
NAOmexico/Sa931f618fd/20241100.3%UnknownRecorded
PRDmexico/Sa931f618fd/20241000.3%UnknownRecorded

2021

Special · Legal certification not established · candidate marks

  • MORENA44.4%
  • PT13.0%
  • PVEM9.3%
  • PRI6.8%
  • FXM5.3%
  • PAN4.4%
  • PRD_NAO_33.6%
  • PUP3.0%
  • RSP2.2%
  • MC1.5%
  • PES0.6%
Results for event-0a150c0bf06b4e8d1048ef9d
Label / candidateParty codeVotesShareSeatsStatus
MORENAmexico/Sc443c082c9/202114,06044.4%UnknownRecorded
PTmexico/Sc443c082c9/20214,12613%UnknownRecorded
PVEMmexico/Sc443c082c9/20212,9559.3%UnknownRecorded
PRImexico/Sc443c082c9/20212,1706.8%UnknownRecorded
FXMmexico/Sc443c082c9/20211,6905.3%UnknownRecorded
PANmexico/Sc443c082c9/20211,4054.4%UnknownRecorded
PRD_NAO_3mexico/Sc443c082c9/20211,1563.6%UnknownRecorded
PUPmexico/Sc443c082c9/20219403%UnknownRecorded
RSPmexico/Sc443c082c9/20217102.2%UnknownRecorded
MCmexico/Sc443c082c9/20214621.5%UnknownRecorded
PESmexico/Sc443c082c9/20212000.6%UnknownRecorded

2018

Special · Legal certification not established · candidate marks

  • PT_MORENA_ES41.0%
  • PAN_PRD_MC34.1%
  • PRI_PANAL15.6%
  • PVEM3.0%
  • CAND_IND201.9%
  • PMR1.1%
  • PSD0.1%
Results for event-cb7339e852f0730f24b106bb
Label / candidateParty codeVotesShareSeatsStatus
PT_MORENA_ESmexico/S8c351365b7/201813,93841%UnknownRecorded
PAN_PRD_MCmexico/S8c351365b7/201811,59234.1%UnknownRecorded
PRI_PANALmexico/S8c351365b7/20185,29615.6%UnknownRecorded
PVEMmexico/S8c351365b7/20181,0193%UnknownRecorded
CAND_IND20mexico/S8c351365b7/20186411.9%UnknownRecorded
PMRmexico/S8c351365b7/20183601.1%UnknownRecorded
PSDmexico/S8c351365b7/2018350.1%UnknownRecorded

4. Competition and volatility

competition index

Provisional imported-series CI

0 (recorded zero)0–100 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=56.088631371175694, oldest_gap=7.134819500623458, previous_gap=33.2529959161813

pedersen volatility

Provisional volatility

60.95percentage 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=[[0.7131259749769189,7.780713762694598,0.3183598102575531,14.042851230460666,0,4.371080194836204,0,72.77386902677407],[4.703086295775591,7.26384146749682,0,13.811340965387963,9.891544486844747,1.5464952801767424,47.06433688156926,15.71935462274888],[0,0,0,0,3.099054165019312,0,0,96.90094583498069]]

pedersen volatility

Provisional volatility

81.18percentage 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=[[0.7131259749769189,7.780713762694598,0.3183598102575531,14.042851230460666,0,4.371080194836204,0,72.77386902677407],[4.703086295775591,7.26384146749682,0,13.811340965387963,9.891544486844747,1.5464952801767424,47.06433688156926,15.71935462274888],[0,0,0,0,3.099054165019312,0,0,96.90094583498069]]

pedersen volatility

Provisional volatility

71.06percentage 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=[[0.7131259749769189,7.780713762694598,0.3183598102575531,14.042851230460666,0,4.371080194836204,0,72.77386902677407],[4.703086295775591,7.26384146749682,0,13.811340965387963,9.891544486844747,1.5464952801767424,47.06433688156926,15.71935462274888],[0,0,0,0,3.099054165019312,0,0,96.90094583498069]]

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. “SANTO DOMINGO TEHUANTEPEC — Municipal government.” Subnational Election Observatory, releaselatin-america-fe5e91689def, snapshot 2026-09-13. /electiondatabase/offices/MX-M-20-515. Sources: mexico--url-3635e08ffbefd711526cbeea, mexico--Sa931f618fd, mexico--Sc443c082c9, mexico--S8c351365b7.