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

Office briefing

OCUILAN — Municipal government

Tracked current office. Identifiers stay separate from display names.

Mexico · OCUILAN / MEXICO · municipal · Municipal governmentMX-M-15-64

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
OCUILAN / MEXICO
Next election
2027-06-06
Linked upcoming event
next-6cde7883567a2ef0ea97ba7b
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

  • MC32.2%
  • MORENA21.7%
  • PT10.6%
  • PRD10.1%
  • PRI9.5%
  • NAEM4.6%
  • PAN3.6%
  • PVEM1.3%
Results for event-1423e8ae1763848e0db40371
Label / candidateParty codeVotesShareSeatsStatus
MCmexico/S2d1ac2612e/20245,19332.2%UnknownRecorded
MORENAmexico/S2d1ac2612e/20243,50121.7%UnknownRecorded
PTmexico/S2d1ac2612e/20241,71510.6%UnknownRecorded
PRDmexico/S2d1ac2612e/20241,62810.1%UnknownRecorded
PRImexico/S2d1ac2612e/20241,5369.5%UnknownRecorded
NAEMmexico/S2d1ac2612e/20247364.6%UnknownRecorded
PANmexico/S2d1ac2612e/20245733.6%UnknownRecorded
PVEMmexico/S2d1ac2612e/20242161.3%UnknownRecorded

2021

Special · Legal certification not established · candidate marks

  • PES33.9%
  • PT_MORENA_NAEM29.4%
  • PAN_PRI_PRD20.3%
  • PVEM9.8%
  • MC3.3%
  • RSP0.4%
  • FXM0.2%
Results for event-c16885e71491e549c815a1c7
Label / candidateParty codeVotesShareSeatsStatus
PESmexico/Sdde3eb3ab7/20215,48133.9%UnknownRecorded
PT_MORENA_NAEMmexico/Sdde3eb3ab7/20214,74829.4%UnknownRecorded
PAN_PRI_PRDmexico/Sdde3eb3ab7/20213,28720.3%UnknownRecorded
PVEMmexico/Sdde3eb3ab7/20211,5859.8%UnknownRecorded
MCmexico/Sdde3eb3ab7/20215413.3%UnknownRecorded
RSPmexico/Sdde3eb3ab7/2021690.4%UnknownRecorded
FXMmexico/Sdde3eb3ab7/2021380.2%UnknownRecorded

2018

Special · Legal certification not established · candidate marks

  • PAN_PRD_MC36.2%
  • PRI24.2%
  • PT_MORENA_ES17.5%
  • PANAL14.0%
  • PVEM3.9%
  • VR0.5%
Results for event-bd74f8d95834b2c5a5a79e38
Label / candidateParty codeVotesShareSeatsStatus
PAN_PRD_MCmexico/S549dc6e642/20185,89236.2%UnknownRecorded
PRImexico/S549dc6e642/20183,94424.2%UnknownRecorded
PT_MORENA_ESmexico/S549dc6e642/20182,84417.5%UnknownRecorded
PANALmexico/S549dc6e642/20182,28914%UnknownRecorded
PVEMmexico/S549dc6e642/20186393.9%UnknownRecorded
VRmexico/S549dc6e642/2018850.5%UnknownRecorded

4. Competition and volatility

competition index

Provisional imported-series CI

53.190–100 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=11.206782355278843, oldest_gap=12.413177849996817, previous_gap=4.654263762778591

pedersen volatility

Provisional volatility

90.26percentage 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=[[3.795204662869254,10.17353291826732,10.78288515035104,11.359120413299776,1.430653066631342,34.39528414359518,23.188501788316334,4.8748178566697575],[0,0,0,0,10.06413105594006,3.4351387389675536,0,86.5007302050924],[0,25.13222455872045,0,0,4.071879181800803,0,0,70.79589625947875]]

pedersen volatility

Provisional volatility

25.13percentage 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=[[3.795204662869254,10.17353291826732,10.78288515035104,11.359120413299776,1.430653066631342,34.39528414359518,23.188501788316334,4.8748178566697575],[0,0,0,0,10.06413105594006,3.4351387389675536,0,86.5007302050924],[0,25.13222455872045,0,0,4.071879181800803,0,0,70.79589625947875]]

pedersen volatility

Provisional volatility

57.7percentage 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=[[3.795204662869254,10.17353291826732,10.78288515035104,11.359120413299776,1.430653066631342,34.39528414359518,23.188501788316334,4.8748178566697575],[0,0,0,0,10.06413105594006,3.4351387389675536,0,86.5007302050924],[0,25.13222455872045,0,0,4.071879181800803,0,0,70.79589625947875]]

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. “OCUILAN — Municipal government.” Subnational Election Observatory, releaselatin-america-fe5e91689def, snapshot 2026-09-13. /electiondatabase/offices/MX-M-15-64. Sources: mexico--url-3635e08ffbefd711526cbeea, mexico--S2d1ac2612e, mexico--Sdde3eb3ab7, mexico--S549dc6e642.