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

Office briefing

TLACOACHISTLAHUACA — Municipal government

Tracked current office. Identifiers stay separate from display names.

Mexico · TLACOACHISTLAHUACA / GUERRERO · municipal · Municipal governmentMX-M-12-63

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
TLACOACHISTLAHUACA / GUERRERO
Next election
2027-06-06
Linked upcoming event
next-9b4012109618977f87a802c1
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

  • PVEM46.3%
  • MORENA42.4%
  • PRI6.0%
  • PT1.2%
  • MC0.5%
  • PAN0.4%
  • PRD0.3%
  • PAC0.2%
Results for event-9f7e5113619315a8fca4cbeb
Label / candidateParty codeVotesShareSeatsStatus
PVEMmexico/Sd5f9b8fc10/20245,04246.3%UnknownRecorded
MORENAmexico/Sd5f9b8fc10/20244,61942.4%UnknownRecorded
PRImexico/Sd5f9b8fc10/20246536%UnknownRecorded
PTmexico/Sd5f9b8fc10/20241331.2%UnknownRecorded
MCmexico/Sd5f9b8fc10/2024590.5%UnknownRecorded
PANmexico/Sd5f9b8fc10/2024440.4%UnknownRecorded
PRDmexico/Sd5f9b8fc10/2024340.3%UnknownRecorded
PACmexico/Sd5f9b8fc10/2024210.2%UnknownRecorded

2021

Special · Legal certification not established · candidate marks

  • PRD40.4%
  • PVEM19.2%
  • PRI11.4%
  • PT10.1%
  • MORENA9.8%
  • PAN3.4%
  • FXP0.8%
  • PES0.7%
Results for event-7c8090654276169ee7b3cd25
Label / candidateParty codeVotesShareSeatsStatus
PRDmexico/S8f4e8e0cbf/20214,44640.4%UnknownRecorded
PVEMmexico/S8f4e8e0cbf/20212,11219.2%UnknownRecorded
PRImexico/S8f4e8e0cbf/20211,25411.4%UnknownRecorded
PTmexico/S8f4e8e0cbf/20211,11010.1%UnknownRecorded
MORENAmexico/S8f4e8e0cbf/20211,0749.8%UnknownRecorded
PANmexico/S8f4e8e0cbf/20213733.4%UnknownRecorded
FXPmexico/S8f4e8e0cbf/2021840.8%UnknownRecorded
PESmexico/S8f4e8e0cbf/2021790.7%UnknownRecorded

2018

Special · Legal certification not established · candidate marks

  • PPG25.3%
  • PRD_MC24.3%
  • PT14.0%
  • PVEM10.5%
  • PAN8.8%
  • PANAL5.4%
  • MORENA_ES3.1%
  • PRI0.8%
  • PSG0.4%
Results for event-e3d53635c2bcb1f92eaf6699
Label / candidateParty codeVotesShareSeatsStatus
PPGmexico/S82fa07b9b7/20182,64125.3%UnknownRecorded
PRD_MCmexico/S82fa07b9b7/20182,53624.3%UnknownRecorded
PTmexico/S82fa07b9b7/20181,45714%UnknownRecorded
PVEMmexico/S82fa07b9b7/20181,09410.5%UnknownRecorded
PANmexico/S82fa07b9b7/20189168.8%UnknownRecorded
PANALmexico/S82fa07b9b7/20185635.4%UnknownRecorded
MORENA_ESmexico/S82fa07b9b7/20183253.1%UnknownRecorded
PRImexico/S82fa07b9b7/2018810.8%UnknownRecorded
PSGmexico/S82fa07b9b7/2018410.4%UnknownRecorded

4. Competition and volatility

competition index

Provisional imported-series CI

54.250–100 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=3.9886845827439856, oldest_gap=1.0876320696084534, previous_gap=22.161033042157236

pedersen volatility

Provisional volatility

61.4percentage 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=[[0.4148986327204149,6.157472890146157,0.3206034889203206,1.2541254125412542,47.54361150400754,0.5563413484205564,43.55492692126356,0.19801980198019803],[3.5415875427269277,11.906570451955943,42.21420432966198,10.539308773262439,20.053171287504746,0,10.197493353589062,1.5476642612988987],[9.48829500725088,0.839030453697949,0,15.092189765900144,11.33209032525378,0,0,63.24839444789725]]

pedersen volatility

Provisional volatility

72.2percentage 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=[[0.4148986327204149,6.157472890146157,0.3206034889203206,1.2541254125412542,47.54361150400754,0.5563413484205564,43.55492692126356,0.19801980198019803],[3.5415875427269277,11.906570451955943,42.21420432966198,10.539308773262439,20.053171287504746,0,10.197493353589062,1.5476642612988987],[9.48829500725088,0.839030453697949,0,15.092189765900144,11.33209032525378,0,0,63.24839444789725]]

pedersen volatility

Provisional volatility

66.8percentage 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=[[0.4148986327204149,6.157472890146157,0.3206034889203206,1.2541254125412542,47.54361150400754,0.5563413484205564,43.55492692126356,0.19801980198019803],[3.5415875427269277,11.906570451955943,42.21420432966198,10.539308773262439,20.053171287504746,0,10.197493353589062,1.5476642612988987],[9.48829500725088,0.839030453697949,0,15.092189765900144,11.33209032525378,0,0,63.24839444789725]]

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. “TLACOACHISTLAHUACA — Municipal government.” Subnational Election Observatory, releaselatin-america-fe5e91689def, snapshot 2026-09-13. /electiondatabase/offices/MX-M-12-63. Sources: mexico--url-3635e08ffbefd711526cbeea, mexico--Sd5f9b8fc10, mexico--S8f4e8e0cbf, mexico--S82fa07b9b7.