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

Office briefing

COPALILLO — Municipal government

Tracked current office. Identifiers stay separate from display names.

Mexico · COPALILLO / GUERRERO · municipal · Municipal governmentMX-M-12-19

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
COPALILLO / GUERRERO
Next election
2027-06-06
Linked upcoming event
next-581fdd5234ec28969b0961fc
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

  • PSG31.6%
  • PVEM25.5%
  • PAN_PRI_PRD17.7%
  • PES9.6%
  • MORENA5.8%
  • MLGRO3.3%
  • PAC1.3%
  • PT0.5%
  • MA0.0%
Results for event-c681934edcaea4cff2b36d6c
Label / candidateParty codeVotesShareSeatsStatus
PSGmexico/S8c02340533/20242,57231.6%UnknownRecorded
PVEMmexico/S8c02340533/20242,07625.5%UnknownRecorded
PAN_PRI_PRDmexico/S8c02340533/20241,43517.7%UnknownRecorded
PESmexico/S8c02340533/20247849.6%UnknownRecorded
MORENAmexico/S8c02340533/20244685.8%UnknownRecorded
MLGROmexico/S8c02340533/20242713.3%UnknownRecorded
PACmexico/S8c02340533/20241081.3%UnknownRecorded
PTmexico/S8c02340533/2024400.5%UnknownRecorded
MAmexico/S8c02340533/202440%UnknownRecorded

2021

Special · Legal certification not established · candidate marks

  • PAN21.8%
  • PVEM19.7%
  • RSP16.5%
  • PT15.4%
  • PRI_PRD6.3%
  • MORENA5.6%
  • MC4.4%
  • FXP4.1%
  • PES1.7%
Results for event-76e21e1691bbbac10561800e
Label / candidateParty codeVotesShareSeatsStatus
PANmexico/S82871eabe6/20211,82021.8%UnknownRecorded
PVEMmexico/S82871eabe6/20211,64219.7%UnknownRecorded
RSPmexico/S82871eabe6/20211,37116.5%UnknownRecorded
PTmexico/S82871eabe6/20211,28715.4%UnknownRecorded
PRI_PRDmexico/S82871eabe6/20215236.3%UnknownRecorded
MORENAmexico/S82871eabe6/20214665.6%UnknownRecorded
MCmexico/S82871eabe6/20213694.4%UnknownRecorded
FXPmexico/S82871eabe6/20213424.1%UnknownRecorded
PESmexico/S82871eabe6/20211411.7%UnknownRecorded

2018

Special · Legal certification not established · candidate marks

  • PAN16.6%
  • PSM16.6%
  • PANAL11.5%
  • PVEM11.5%
  • PRD8.3%
  • IHG7.6%
  • MC4.4%
  • MORENA_ES4.1%
  • PT3.8%
  • PSG0.6%
  • PRI0.4%
  • CG0.3%
  • PPG0.1%
Results for event-e08afe446718e7131e9cbc8a
Label / candidateParty codeVotesShareSeatsStatus
PANmexico/S4a950453a6/20181,34416.6%UnknownRecorded
PSMmexico/S4a950453a6/20181,34116.6%UnknownRecorded
PANALmexico/S4a950453a6/201893311.5%UnknownRecorded
PVEMmexico/S4a950453a6/201892711.5%UnknownRecorded
PRDmexico/S4a950453a6/20186728.3%UnknownRecorded
IHGmexico/S4a950453a6/20186197.6%UnknownRecorded
MCmexico/S4a950453a6/20183574.4%UnknownRecorded
MORENA_ESmexico/S4a950453a6/20183334.1%UnknownRecorded
PTmexico/S4a950453a6/20183113.8%UnknownRecorded
PSGmexico/S4a950453a6/2018510.6%UnknownRecorded
PRImexico/S4a950453a6/2018360.4%UnknownRecorded
CGmexico/S4a950453a6/2018230.3%UnknownRecorded
PPGmexico/S4a950453a6/201860.1%UnknownRecorded

4. Competition and volatility

competition index

Provisional imported-series CI

77.440–100 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=6.393400360917759, oldest_gap=0.043146843089314046, previous_gap=2.2359000125612383

pedersen volatility

Provisional volatility

43.15percentage 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=[[0,0,0,0.5155968032998195,26.759474091260635,0,6.0324825986078885,66.69244650683166],[22.861449566637358,0,0,16.166310764979276,20.62554955407612,4.635096093455596,5.853535987941213,29.85805803291044],[19.329785704012657,0.5177621170717676,9.664892852006329,4.4728894002588815,13.332374514598015,5.134474327628362,0,47.54782108442398]]

pedersen volatility

Provisional volatility

28.37percentage 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=[[0,0,0,0.5155968032998195,26.759474091260635,0,6.0324825986078885,66.69244650683166],[22.861449566637358,0,0,16.166310764979276,20.62554955407612,4.635096093455596,5.853535987941213,29.85805803291044],[19.329785704012657,0.5177621170717676,9.664892852006329,4.4728894002588815,13.332374514598015,5.134474327628362,0,47.54782108442398]]

pedersen volatility

Provisional volatility

35.76percentage 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=[[0,0,0,0.5155968032998195,26.759474091260635,0,6.0324825986078885,66.69244650683166],[22.861449566637358,0,0,16.166310764979276,20.62554955407612,4.635096093455596,5.853535987941213,29.85805803291044],[19.329785704012657,0.5177621170717676,9.664892852006329,4.4728894002588815,13.332374514598015,5.134474327628362,0,47.54782108442398]]

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. “COPALILLO — Municipal government.” Subnational Election Observatory, releaselatin-america-fe5e91689def, snapshot 2026-09-13. /electiondatabase/offices/MX-M-12-19. Sources: mexico--url-3635e08ffbefd711526cbeea, mexico--S8c02340533, mexico--S82871eabe6, mexico--S4a950453a6.