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

Office briefing

OCOTLAN DE MORELOS — Municipal government

Tracked current office. Identifiers stay separate from display names.

Mexico · OCOTLAN DE MORELOS / OAXACA · municipal · Municipal governmentMX-M-20-67

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
OCOTLAN DE MORELOS / OAXACA
Next election
2027-06-06
Linked upcoming event
next-63b2df1bb8257c3c7881cece
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

  • MC36.1%
  • MORENA24.0%
  • PT10.5%
  • FXMO9.2%
  • PUP6.6%
  • PVEM2.8%
  • MUJER2.2%
  • PRI1.9%
  • PAN1.5%
  • NAO0.4%
  • C_PVEM_MORENA_20.4%
  • PRD0.4%
Results for event-6a1ab283b54318188501dcfe
Label / candidateParty codeVotesShareSeatsStatus
MCmexico/S082a4e3900/20244,43136.1%UnknownRecorded
MORENAmexico/S082a4e3900/20242,94224%UnknownRecorded
PTmexico/S082a4e3900/20241,28510.5%UnknownRecorded
FXMOmexico/S082a4e3900/20241,1339.2%UnknownRecorded
PUPmexico/S082a4e3900/20248106.6%UnknownRecorded
PVEMmexico/S082a4e3900/20243422.8%UnknownRecorded
MUJERmexico/S082a4e3900/20242722.2%UnknownRecorded
PRImexico/S082a4e3900/20242281.9%UnknownRecorded
PANmexico/S082a4e3900/20241821.5%UnknownRecorded
NAOmexico/S082a4e3900/2024490.4%UnknownRecorded
C_PVEM_MORENA_2mexico/S082a4e3900/2024480.4%UnknownRecorded
PRDmexico/S082a4e3900/2024470.4%UnknownRecorded

2021

Special · Legal certification not established · candidate marks

  • PVEM22.3%
  • FXM22.1%
  • MORENA21.2%
  • PT14.1%
  • PAN_PRI_PRD7.2%
  • MC6.6%
  • RSP1.0%
  • NAO0.6%
  • PES0.5%
Results for event-cacc1813f33c66d78240a295
Label / candidateParty codeVotesShareSeatsStatus
PVEMmexico/S200b090e23/20212,43822.3%UnknownRecorded
FXMmexico/S200b090e23/20212,41922.1%UnknownRecorded
MORENAmexico/S200b090e23/20212,32121.2%UnknownRecorded
PTmexico/S200b090e23/20211,54114.1%UnknownRecorded
PAN_PRI_PRDmexico/S200b090e23/20217897.2%UnknownRecorded
MCmexico/S200b090e23/20217266.6%UnknownRecorded
RSPmexico/S200b090e23/20211061%UnknownRecorded
NAOmexico/S200b090e23/2021650.6%UnknownRecorded
PESmexico/S200b090e23/2021590.5%UnknownRecorded

2018

Special · Legal certification not established · candidate marks

  • PT_MORENA_ES38.1%
  • CAND_IND1729.9%
  • PMR14.9%
  • PRI_PVEM_PANAL7.5%
  • PAN_PRD_MC5.4%
Results for event-4d003b734a49396ef2835a7d
Label / candidateParty codeVotesShareSeatsStatus
PT_MORENA_ESmexico/Sa76f13e030/20184,56138.1%UnknownRecorded
CAND_IND17mexico/Sa76f13e030/20183,57829.9%UnknownRecorded
PMRmexico/Sa76f13e030/20181,78114.9%UnknownRecorded
PRI_PVEM_PANALmexico/Sa76f13e030/20188937.5%UnknownRecorded
PAN_PRD_MCmexico/Sa76f13e030/20186505.4%UnknownRecorded

4. Competition and volatility

competition index

Provisional imported-series CI

57.480–100 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=12.651882063046987, oldest_gap=8.575416557620173, previous_gap=0.18157492354739801

pedersen volatility

Provisional volatility

37.41percentage 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=[[1.5464355510238763,1.937292888095845,0.39935423570396805,10.918514742119127,2.9059393321437677,37.649757838388986,24.997875775342,19.644829637182426],[0,0,0,14.726681957186544,23.29892966360856,6.9380733944954125,22.18081039755352,32.85550458715597],null]

pedersen volatility

Withheld volatility

Unknownpercentage 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 · Comparable grouped vectors unavailable for this interval

Method pedersen.grouped.v1. Inputs: groups=["PAN","PRI","PRD","PT","PVEM","MC","MORENA","Other"], interval=Previous interval, vectors=[[1.5464355510238763,1.937292888095845,0.39935423570396805,10.918514742119127,2.9059393321437677,37.649757838388986,24.997875775342,19.644829637182426],[0,0,0,14.726681957186544,23.29892966360856,6.9380733944954125,22.18081039755352,32.85550458715597],null]

pedersen volatility

Withheld volatility

Unknownpercentage 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 · Comparable grouped vectors unavailable for this interval

Method pedersen.grouped.v1. Inputs: groups=["PAN","PRI","PRD","PT","PVEM","MC","MORENA","Other"], interval=Both intervals mean, vectors=[[1.5464355510238763,1.937292888095845,0.39935423570396805,10.918514742119127,2.9059393321437677,37.649757838388986,24.997875775342,19.644829637182426],[0,0,0,14.726681957186544,23.29892966360856,6.9380733944954125,22.18081039755352,32.85550458715597],null]

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. “OCOTLAN DE MORELOS — Municipal government.” Subnational Election Observatory, releaselatin-america-fe5e91689def, snapshot 2026-09-13. /electiondatabase/offices/MX-M-20-67. Sources: mexico--url-3635e08ffbefd711526cbeea, mexico--S082a4e3900, mexico--S200b090e23, mexico--Sa76f13e030.