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

Office briefing

MATILDE — Municipal mayor/commission joint ballot (2027 transition)

Tracked current office. Identifiers stay separate from display names.

Argentina · MATILDE / Santa Fe — LAS COLONIAS · municipal · Municipal mayor/commission joint ballot (2027 transition)AR-SF-C-LASCOLONIAS-MATILDE

Read the complete original research briefing

Formal 2027 polling date is pending. Law 14,436 governs the 2027 transition. Local choices about council structure can remain open until 30 November 2026. Earlier communal commission returns are predecessor-institution comparisons; the new mayor/commission joint ballot is not an identical office. Official votes and elected rosters are retained. Council counts describe elected cohorts. Current governing membership and later replacements require verification.

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

Geography
MATILDE / Santa Fe — LAS COLONIAS
Next election
2027; formal call pending
Linked upcoming event
next-92f1106c822ec282e09cc95b
Registry qualification
Unknown

2. How certain is that date?

2027; formal call pending is expected (not formally called). Year precision. A date without a formal call is not confirmed.

3. Who won earlier selected elections?

2025-06-29

Ordinary · Legal certification not established · list votes

  • UNIDOS PARA CAMBIAR SANTA FE100.0%
Results for event-162de863fa5d863aa2311743
Label / candidateParty codeVotesShareSeatsStatus
UNIDOS PARA CAMBIAR SANTA FE78argentina/Sa9a75bad2b02/2025225100%3Recorded

2023-09-10

Ordinary · Legal certification not established · list votes

  • VECINAL MATILDE AVANZA65.3%
  • UNIDOS PARA CAMBIAR SANTA FE34.7%
Results for event-24769d18be4b20dd52b10b1a
Label / candidateParty codeVotesShareSeatsStatus
VECINAL MATILDE AVANZA59argentina/Sd5731ccd0603/202338565.3%2Recorded
UNIDOS PARA CAMBIAR SANTA FE102argentina/Sd5731ccd0603/202320534.7%1Recorded

2021-11-14

Ordinary · Legal certification not established · list votes

  • VECINAL MATILDE AVANZA63.4%
  • FRENTE PROGRESISTA CÍVICO Y SOCIAL36.6%
Results for event-48d37ebdf95c3ddc102d737b
Label / candidateParty codeVotesShareSeatsStatus
VECINAL MATILDE AVANZA143argentina/Sb8d17cc3e2b2/202136363.4%UnknownRecorded
FRENTE PROGRESISTA CÍVICO Y SOCIAL18argentina/Sb8d17cc3e2b2/202121036.6%UnknownRecorded

Other events (not selected cycles)

  • 2017-10-22 · Ordinary · Legal certification not established
  • 2019-06-16 · Ordinary · Legal certification not established
  • 2015-06-14 · Ordinary · Legal certification not established

4. Competition and volatility

competition index

Withheld

Unknown0–100 historical closeness

Actual-event and/or comparability review incomplete

Comparison status: Comparison unavailable · Formal 2027 polling date is pending. Law 14,436 governs the 2027 transition. Local choices about council structure can remain open until 30 November 2026. Earlier communal commission returns are predecessor-institution comparisons; the new mayor/commission joint ballot is not an identical office. Official votes and elected rosters are retained. Council counts describe elected cohorts. Current governing membership and later replacements require verification.

Method ci.weighted-gap.v1. Inputs: latest_gap=null, oldest_gap=null, previous_gap=null

pedersen volatility

Withheld volatility

Unknownpercentage points

Grouped Pedersen lower bound (percentage points). Nine exact standalone party-name categories in the archived returns; accents normalized. Provincial alliances and renamed coalitions remain Other. A category records its published name, not a verified legal succession or inferred allocation of alliance votes. 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=["PARTIDO JUSTICIALISTA","UNION CIVICA RADICAL","PARTIDO SOCIALISTA","PRO - PROPUESTA REPUBLICANA","COALICION CIVICA - AFIRMACION PARA UNA REPUBLICA IGUALITARIA","GEN","PARTIDO OBRERO","PARTIDO DE LOS TRABAJADORES SOCIALISTAS","MOVIMIENTO SOCIALISTA DE LOS TRABAJADORES","Other"], interval=Latest interval, vectors=[null,null,null]

pedersen volatility

Withheld volatility

Unknownpercentage points

Grouped Pedersen lower bound (percentage points). Nine exact standalone party-name categories in the archived returns; accents normalized. Provincial alliances and renamed coalitions remain Other. A category records its published name, not a verified legal succession or inferred allocation of alliance votes. 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=["PARTIDO JUSTICIALISTA","UNION CIVICA RADICAL","PARTIDO SOCIALISTA","PRO - PROPUESTA REPUBLICANA","COALICION CIVICA - AFIRMACION PARA UNA REPUBLICA IGUALITARIA","GEN","PARTIDO OBRERO","PARTIDO DE LOS TRABAJADORES SOCIALISTAS","MOVIMIENTO SOCIALISTA DE LOS TRABAJADORES","Other"], interval=Previous interval, vectors=[null,null,null]

pedersen volatility

Withheld volatility

Unknownpercentage points

Grouped Pedersen lower bound (percentage points). Nine exact standalone party-name categories in the archived returns; accents normalized. Provincial alliances and renamed coalitions remain Other. A category records its published name, not a verified legal succession or inferred allocation of alliance votes. 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=["PARTIDO JUSTICIALISTA","UNION CIVICA RADICAL","PARTIDO SOCIALISTA","PRO - PROPUESTA REPUBLICANA","COALICION CIVICA - AFIRMACION PARA UNA REPUBLICA IGUALITARIA","GEN","PARTIDO OBRERO","PARTIDO DE LOS TRABAJADORES SOCIALISTAS","MOVIMIENTO SOCIALISTA DE LOS TRABAJADORES","Other"], interval=Both intervals mean, vectors=[null,null,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.

Officeholder observations
PersonRoleAs ofAffiliationPrincipal?
FOURNELL DIEGO DARIOMIEMBRO COMUNAL2017COALICION CIVICA - ARIunknown
VALLEJOS LUIS ORLANDOMIEMBRO COMUNAL2017COALICION CIVICA - ARIunknown
RODRIGUEZ DASTUGUE OSCAR LUISMIEMBRO COMUNAL2017PARTIDO DEMOCRATA PROGRESISTAunknown
FOURNELL DIEGO DARIOMIEMBRO COMUNAL2019FRENTE PROGRESISTA CIVICO Y SOCIALunknown
VALLEJOS LUIS ORLANDOMIEMBRO COMUNAL2019FRENTE PROGRESISTA CIVICO Y SOCIALunknown
MALETTI ROMINA MARIA ITATIMIEMBRO COMUNAL2019FRENTE PROGRESISTA CIVICO Y SOCIALunknown
SALDAÑO LUCASM. Comunal2023VECINAL MATILDE AVANZAunknown
VALLEJOS ELEN CARLAM. Comunal2023VECINAL MATILDE AVANZAunknown
VALLEJOS LUIS ORLANDOM. Comunal2023UNIDOS PARA CAMBIAR SANTA FEunknown
SALDAÑO LUCASM. Comunal2025UNIDOS PARA CAMBIAR SANTA FEunknown
ROMERO CRISTINA GUADALUPEM. Comunal2025UNIDOS PARA CAMBIAR SANTA FEunknown
NIETO LUCAS NAHUELM. Comunal2025UNIDOS PARA CAMBIAR SANTA FEunknown

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

Formal 2027 polling date is pending. Law 14,436 governs the 2027 transition. Local choices about council structure can remain open until 30 November 2026. Earlier communal commission returns are predecessor-institution comparisons; the new mayor/commission joint ballot is not an identical office. Official votes and elected rosters are retained. Council counts describe elected cohorts. Current governing membership and later replacements require verification. Missing older local results in several provincial datasets, full seat proclamations, intervened/replacement contests and dated coalition control. Many municipalities vote separately from provincial election day. Final 2027 calls remain subject to official publication. Ten Catamarca 2023 local returns now have primary provisional counts; final certification and older cycles are still missing. DINE 2015 download has no Catamarca local records. Entre Ríos final national consultation warns that foreign-voter tables are excluded. Neuquén final-file links returned access-denied responses; several older links point to private or defunct hosts.

  • other · open

    2019 locality result empty: {"issue": "2019 locality result empty", "name": "Distrito Tala-Sarandí", "code": "0079C"}

  • other · open

    Earlier same-election publication superseded: {"id": "AR-TU-D-OESTE", "year": 2019, "issue": "Earlier same-election publication superseded", "selected_publication": "2019-07-02", "discarded_publications": ["2019-06-15"]}

  • other · open

    Archive navigation year differs from date printed in source: {"file": "ar_formosa_2017_archivo_542.pdf", "issue": "Archive navigation year differs from date printed in source", "navigation_year": 2017, "source_date": "2019-06-16"}

Sources

Cite this record

Center for Digital Democracy. “MATILDE — Municipal mayor/commission joint ballot (2027 transition).” Subnational Election Observatory, releaselatin-america-fe5e91689def, snapshot 2026-09-13. /electiondatabase/offices/AR-SF-C-LASCOLONIAS-MATILDE. Sources: argentina--url-37c2f32beac05e8dc61453fe, argentina--url-c59a56523176464d6aa95c66, argentina--url-ae1cc55bbf8032bb243fb0b6, argentina--url-5f87e101c11beb3c13ee782c, argentina--url-5a55b3b32d7b3d501f49fde7, argentina--url-d60871030d2ff4df260c60a5, argentina--url-d7161d241341725861e1307d, argentina--Sa9a75bad2b02, argentina--S6cbb0ff8bc14, argentina--Sd5731ccd0603, argentina--S6c0f4226a3e8, argentina--Sb8d17cc3e2b2, argentina--Sa3b7b35e32ee, argentina--S492e928e5e7e, argentina--S425b76ef9089, argentina--Sf3a1f8fa36ef, argentina--Sbdba16edeb96.