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

Office briefing

OTUMBA — Municipal government

Tracked current office. Identifiers stay separate from display names.

Mexico · OTUMBA / MEXICO · municipal · Municipal governmentMX-M-15-66

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
OTUMBA / MEXICO
Next election
2027-06-06
Linked upcoming event
next-8895e6d468c3ace0c19d3a29
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

  • PAN_PRI_PRD_NAEM32.5%
  • MORENA30.1%
  • PVEM27.6%
  • PT5.9%
  • MC0.7%
Results for event-8e3c29686de473babba89224
Label / candidateParty codeVotesShareSeatsStatus
PAN_PRI_PRD_NAEMmexico/S66f86b4f2a/20246,55732.5%UnknownRecorded
MORENAmexico/S66f86b4f2a/20246,07230.1%UnknownRecorded
PVEMmexico/S66f86b4f2a/20245,57927.6%UnknownRecorded
PTmexico/S66f86b4f2a/20241,1915.9%UnknownRecorded
MCmexico/S66f86b4f2a/20241490.7%UnknownRecorded

2021

Special · Legal certification not established · candidate marks

  • PRI39.6%
  • PAN20.7%
  • PVEM17.0%
  • PT_MORENA_NAEM9.4%
  • PRD7.6%
  • RSP2.9%
  • PES0.4%
  • MC0.3%
  • FXM0.2%
Results for event-fbb16fd88bedd08f9a462057
Label / candidateParty codeVotesShareSeatsStatus
PRImexico/Sad8a14c9f6/20217,43539.6%UnknownRecorded
PANmexico/Sad8a14c9f6/20213,89120.7%UnknownRecorded
PVEMmexico/Sad8a14c9f6/20213,18217%UnknownRecorded
PT_MORENA_NAEMmexico/Sad8a14c9f6/20211,7569.4%UnknownRecorded
PRDmexico/Sad8a14c9f6/20211,4287.6%UnknownRecorded
RSPmexico/Sad8a14c9f6/20215492.9%UnknownRecorded
PESmexico/Sad8a14c9f6/2021720.4%UnknownRecorded
MCmexico/Sad8a14c9f6/2021480.3%UnknownRecorded
FXMmexico/Sad8a14c9f6/2021320.2%UnknownRecorded

2018

Special · Legal certification not established · candidate marks

  • PAN_PRD_MC38.3%
  • PRI21.3%
  • PT_MORENA_ES20.9%
  • PANAL9.2%
  • VR6.2%
  • PVEM1.4%
Results for event-0ef7f95dcfcbe57aeaf08f97
Label / candidateParty codeVotesShareSeatsStatus
PAN_PRD_MCmexico/Sf56f0dfc23/20186,78338.3%UnknownRecorded
PRImexico/Sf56f0dfc23/20183,76621.3%UnknownRecorded
PT_MORENA_ESmexico/Sf56f0dfc23/20183,69420.9%UnknownRecorded
PANALmexico/Sf56f0dfc23/20181,6309.2%UnknownRecorded
VRmexico/Sf56f0dfc23/20181,1056.2%UnknownRecorded
PVEMmexico/Sf56f0dfc23/20182401.4%UnknownRecorded

4. Competition and volatility

competition index

Provisional imported-series CI

54.890–100 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=2.481072232453446, oldest_gap=17.52236032059473, previous_gap=19.268199858641875

pedersen volatility

Provisional volatility

69.34percentage 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=[[0,0,0,6.092694904849601,28.540004092490282,0.7622263147125026,31.062001227747086,33.54307346020053],[21.154787147284292,40.42298700592617,7.763823193606263,0,17.300059805360736,0.26096884684390803,0,13.097374000978633],[0,21.872459054477872,0,0,1.3938901149959344,0,0,76.73365083052619]]

pedersen volatility

Provisional volatility

63.64percentage 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=[[0,0,0,6.092694904849601,28.540004092490282,0.7622263147125026,31.062001227747086,33.54307346020053],[21.154787147284292,40.42298700592617,7.763823193606263,0,17.300059805360736,0.26096884684390803,0,13.097374000978633],[0,21.872459054477872,0,0,1.3938901149959344,0,0,76.73365083052619]]

pedersen volatility

Provisional volatility

66.49percentage 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=[[0,0,0,6.092694904849601,28.540004092490282,0.7622263147125026,31.062001227747086,33.54307346020053],[21.154787147284292,40.42298700592617,7.763823193606263,0,17.300059805360736,0.26096884684390803,0,13.097374000978633],[0,21.872459054477872,0,0,1.3938901149959344,0,0,76.73365083052619]]

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. “OTUMBA — Municipal government.” Subnational Election Observatory, releaselatin-america-fe5e91689def, snapshot 2026-09-13. /electiondatabase/offices/MX-M-15-66. Sources: mexico--url-3635e08ffbefd711526cbeea, mexico--S66f86b4f2a, mexico--Sad8a14c9f6, mexico--Sf56f0dfc23.