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

Office briefing

Aranzazu — Mayor

Tracked current office. Identifiers stay separate from display names.

Colombia · Aranzazu / Caldas · municipal · MayorCO-ALC-17050

Read the complete original research briefing

Expected ordinary election on the last Sunday of October; formal call and 2027 roster require refresh. CEDE/Registraduría ordinary returns V2. Shares exclude blank and invalid ballots. Changing coalition labels and current control are not harmonized. Repeats, annulments and opposition-seat acceptance require certification review.

1. What office, where, and when is the next election?

Geography
Aranzazu / Caldas
Next election
2027-10-31
Linked upcoming event
next-18e26348a6c8fcc97e97414d
Registry qualification
Unknown

2. How certain is that date?

2027-10-31 is expected (not formally called). Day precision. A date without a formal call is not confirmed.

3. Who won earlier selected elections?

2023

Ordinary · Legal certification not established · list votes

  • GENTE EN MOVIMIENTO - PARTIDO DE LA U59.3%
  • COALICION PARTIDO CONSERVADOR - AGRUPACION EN MARCHA19.0%
  • PARTIDO CENTRO DEMOCRATICO - MANO FIRME CORAZON GRANDE18.4%
  • MOVIMIENTO ALTERNATIVO INDIGENA Y SOCIAL - MAIS3.3%
Results for event-98afc5bfcc3c1b1fb0c77206
Label / candidateParty codeVotesShareSeatsStatus
GENTE EN MOVIMIENTO - PARTIDO DE LA U · Sebastian Merchan Zuluaga20230267colombia/Sdc3a3f1f89/20233,72859.3%UnknownRecorded
COALICION PARTIDO CONSERVADOR - AGRUPACION EN MARCHA · Juan Martin Serna Gomez20230266colombia/Sdc3a3f1f89/20231,19719%UnknownRecorded
PARTIDO CENTRO DEMOCRATICO - MANO FIRME CORAZON GRANDE · Gabriel Zuluaga Montes20130001colombia/Sdc3a3f1f89/20231,15618.4%UnknownRecorded
MOVIMIENTO ALTERNATIVO INDIGENA Y SOCIAL - MAIS · Guillermo Elias Gomez Gomez20130002colombia/Sdc3a3f1f89/20232073.3%UnknownRecorded

2019

Ordinary · Legal certification not established · list votes

  • COALICION ALCALDIA DE ARANZAZU-CAL. PARTIDO CENTRO DEMOCRATICO - PARTIDO CONSERVADOR Y PARTIDO LIBERAL - "UNIDOS POR ARANZAZU"50.3%
  • COALICION ALCALDIA DE ARANZAZU-CAL. PARTIDO DE LA U Y PARTIDO ALIANZA VERDE49.7%
Results for event-76e30a2fab2a4557e69969ab
Label / candidateParty codeVotesShareSeatsStatus
COALICION ALCALDIA DE ARANZAZU-CAL. PARTIDO CENTRO DEMOCRATICO - PARTIDO CONSERVADOR Y PARTIDO LIBERAL - "UNIDOS POR ARANZAZU" · Jose Lisimaco Amador Cuestas20191904colombia/S67eb704c85/20193,00750.3%UnknownRecorded
COALICION ALCALDIA DE ARANZAZU-CAL. PARTIDO DE LA U Y PARTIDO ALIANZA VERDE · Nicolas Eduardo Jimenez Mejia20190173colombia/S67eb704c85/20192,97749.7%UnknownRecorded

2015

Ordinary · Legal certification not established · list votes

  • PARTIDO CONSERVADOR COLOMBIANO49.5%
  • PARTIDO ALIANZA VERDE34.0%
  • PARTIDO CENTRO DEMOCRATICO - MANO FIRME CORAZON GRANDE8.4%
  • PARTIDO SOCIAL DE UNIDAD NACIONAL - PARTIDO DE LA U8.0%
Results for event-fd2b24086adb0261891969f9
Label / candidateParty codeVotesShareSeatsStatus
PARTIDO CONSERVADOR COLOMBIANO · Jorge William Ruiz Ospina18490002colombia/S8164286948/20153,14549.5%UnknownRecorded
PARTIDO ALIANZA VERDE · Nicolas Eduardo Jimenez Mejia20090002colombia/S8164286948/20152,16034%UnknownRecorded
PARTIDO CENTRO DEMOCRATICO - MANO FIRME CORAZON GRANDE · Silvio Hernan Salazar Serna20130001colombia/S8164286948/20155328.4%UnknownRecorded
PARTIDO SOCIAL DE UNIDAD NACIONAL - PARTIDO DE LA U · Jose Danilo Osorio Badillo20050002colombia/S8164286948/20155118%UnknownRecorded

4. Competition and volatility

competition index

Provisional imported-series CI

0 (recorded zero)0–100 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=40.25127226463104, oldest_gap=15.516698172652802, previous_gap=0.5013368983957207

pedersen volatility

Withheld volatility

Unknownpercentage points

Grouped Pedersen lower bound (percentage points). Ten exact standalone national-party labels. Mixed coalitions, unidentified CEDE codes and other lists stay Other. Changes in coalition participation are not resolved into constituent-party votes. Geographic and actual-event audits remain open. 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 · Comparable grouped vectors unavailable for this interval

Method pedersen.grouped.v1. Inputs: groups=["Conservador","Liberal","La U","Cambio Radical","Centro Democratico","Alianza Verde","ASI","MAIS","Polo","AICO","Other"], interval=Latest interval, vectors=[[0,0,0,0,18.384223918575064,0,0,3.2919847328244276,0,0,78.32379134860051],null,[49.54316320100819,0,8.049779458097039,0,8.380592312539383,34.02646502835539,0,0,0,0,0]]

pedersen volatility

Withheld volatility

Unknownpercentage points

Grouped Pedersen lower bound (percentage points). Ten exact standalone national-party labels. Mixed coalitions, unidentified CEDE codes and other lists stay Other. Changes in coalition participation are not resolved into constituent-party votes. Geographic and actual-event audits remain open. 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=["Conservador","Liberal","La U","Cambio Radical","Centro Democratico","Alianza Verde","ASI","MAIS","Polo","AICO","Other"], interval=Previous interval, vectors=[[0,0,0,0,18.384223918575064,0,0,3.2919847328244276,0,0,78.32379134860051],null,[49.54316320100819,0,8.049779458097039,0,8.380592312539383,34.02646502835539,0,0,0,0,0]]

pedersen volatility

Withheld volatility

Unknownpercentage points

Grouped Pedersen lower bound (percentage points). Ten exact standalone national-party labels. Mixed coalitions, unidentified CEDE codes and other lists stay Other. Changes in coalition participation are not resolved into constituent-party votes. Geographic and actual-event audits remain open. 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=["Conservador","Liberal","La U","Cambio Radical","Centro Democratico","Alianza Verde","ASI","MAIS","Polo","AICO","Other"], interval=Both intervals mean, vectors=[[0,0,0,0,18.384223918575064,0,0,3.2919847328244276,0,0,78.32379134860051],null,[49.54316320100819,0,8.049779458097039,0,8.380592312539383,34.02646502835539,0,0,0,0,0]]

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.

National context is listed on the polling page. It is not a local forecast.

7. Unresolved issues and sources

Expected ordinary election on the last Sunday of October; formal call and 2027 roster require refresh. CEDE/Registraduría ordinary returns V2. Shares exclude blank and invalid ballots. Changing coalition labels and current control are not harmonized. Repeats, annulments and opposition-seat acceptance require certification review. Six 2023 assemblies remain absent: Amazonas, Guainía, Huila, Risaralda, Vaupés and Vichada. Cali’s 37 JAL boards and dated membership rosters are registered; the national JAL register, three-cycle votes and replacement-event final returns remain incomplete. Twenty mixed-list-type histories, Bogotá and Cali 2015 partial counts and candidate/elected-flag inconsistencies require reconciliation. The national historical portal rejected this browser through security screening. Full legal seat allocation is separate from candidate flags and directory headcounts.

    Sources

    Cite this record

    Center for Digital Democracy. “Aranzazu — Mayor.” Subnational Election Observatory, releaselatin-america-fe5e91689def, snapshot 2026-09-13. /electiondatabase/offices/CO-ALC-17050. Sources: colombia--url-44e0af24e3fef22401f2d269, colombia--url-f8cbad13a2c7112410d7a492, colombia--url-142631271ac95a7106b17681, colombia--Sdc3a3f1f89, colombia--S67eb704c85, colombia--S8164286948.