Skip to observatory content

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

Center forDigital DemocracyElection database
Back to the Center

Office briefing

Buenos Aires — Legislature

Tracked current office. Identifiers stay separate from display names.

Argentina · Buenos Aires / Ciudad Autónoma de Buenos Aires · regional · LegislatureAR-CABA-D

Read the complete original research briefing

Official final vote series. Legislative returns are partial renewals. Latest actual-event sequence and current government require separate verification.

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

Geography
Buenos Aires / Ciudad Autónoma de Buenos Aires
Next election
2027; formal call pending
Linked upcoming event
next-80a554faff54e8c652ba2877
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?

2025-05-18

Ordinary · Legal certification not established · list votes

  • La Libertad Avanza30.7%
  • Alianza "Es Ahora Buenos Aires"27.9%
  • Alianza "Buenos Aires Primero"16.2%
  • Alianza "Volvamos Buenos Aires"8.2%
  • Alianza "Frente de Izquierda y de Trabajadores- Unidad"3.2%
  • Unión del Centro Democrático2.7%
  • Coalición Civica — Afirmación para una República Igualitaria (ARI)2.5%
  • Alianza "Evolución"2.4%
  • Alianza "Principios y Valores"2.1%
  • Movimiento de Integración y Desarrollo1.7%
  • Alianza "Unión Porteña Libertaria"0.6%
  • Seamos Libres0.5%
  • La Izquierda en la Ciudad0.4%
  • Alianza "Confluencia - Por La Igualdad y la Soberania"0.3%
  • El Movimiento0.2%
  • Frente Patriota Federal0.2%
  • Movimiento Plural0.1%
Results for event-7130b567226900f42e62958d
Label / candidateParty codeVotesShareSeatsStatus
La Libertad Avanza96argentina/Sfed37562b9cf/2025495,96630.7%11Recorded
Alianza "Es Ahora Buenos Aires"701argentina/Sfed37562b9cf/2025450,55927.9%10Recorded
Alianza "Buenos Aires Primero"706argentina/Sfed37562b9cf/2025262,02716.2%5Recorded
Alianza "Volvamos Buenos Aires"704argentina/Sfed37562b9cf/2025133,1088.2%3Recorded
Alianza "Frente de Izquierda y de Trabajadores- Unidad"708argentina/Sfed37562b9cf/202552,0313.2%1Recorded
Unión del Centro Democrático20argentina/Sfed37562b9cf/202543,0972.7%0 (recorded zero)Recorded
Coalición Civica — Afirmación para una República Igualitaria (ARI)47argentina/Sfed37562b9cf/202541,1282.5%0 (recorded zero)Recorded
Alianza "Evolución"705argentina/Sfed37562b9cf/202538,0542.4%0 (recorded zero)Recorded
Alianza "Principios y Valores"702argentina/Sfed37562b9cf/202533,4302.1%0 (recorded zero)Recorded
Movimiento de Integración y Desarrollo1argentina/Sfed37562b9cf/202527,5441.7%0 (recorded zero)Recorded
Alianza "Unión Porteña Libertaria"707argentina/Sfed37562b9cf/202510,3200.6%0 (recorded zero)Recorded
Seamos Libres329argentina/Sfed37562b9cf/20258,3600.5%0 (recorded zero)Recorded
La Izquierda en la Ciudad350argentina/Sfed37562b9cf/20256,3200.4%0 (recorded zero)Recorded
Alianza "Confluencia - Por La Igualdad y la Soberania"703argentina/Sfed37562b9cf/20255,4480.3%0 (recorded zero)Recorded
El Movimiento262argentina/Sfed37562b9cf/20253,2470.2%0 (recorded zero)Recorded
Frente Patriota Federal95argentina/Sfed37562b9cf/20252,5920.2%0 (recorded zero)Recorded
Movimiento Plural352argentina/Sfed37562b9cf/20252,0910.1%0 (recorded zero)Recorded

2023-10-22

Ordinary · Legal certification not established · list votes

  • Juntos por el Cambio49.7%
  • Unión por la Patria31.1%
  • La Libertad Avanza13.9%
  • Frente de Izquierda Trabajadores – Unidad5.2%
Results for event-419e336f0316d83b23b84c16
Label / candidateParty codeVotesShareSeatsStatus
Juntos por el Cambioargentina/S7ab93001376c/2023890,97649.7%UnknownRecorded
Unión por la Patriaargentina/S7ab93001376c/2023557,80831.1%UnknownRecorded
La Libertad Avanzaargentina/S7ab93001376c/2023249,17013.9%UnknownRecorded
Frente de Izquierda Trabajadores – Unidadargentina/S7ab93001376c/202393,7595.2%UnknownRecorded

2021-11-14

Ordinary · Legal certification not established · list votes

  • JUNTOS POR EL CAMBIO46.8%
  • FRENTE DE TODOS25.5%
  • LA LIBERTAD AVANZA16.7%
  • FRENTE IZQUIERDA Y DE TRABAJADORES -UNIDAD7.9%
  • AUTODETERMINACION Y LIBERTAD3.0%
Results for event-be041e3c7b00a59875f2b795
Label / candidateParty codeVotesShareSeatsStatus
JUNTOS POR EL CAMBIOargentina/S90c0023bab11/2021891,98346.8%UnknownRecorded
FRENTE DE TODOSargentina/S90c0023bab11/2021484,95025.5%UnknownRecorded
LA LIBERTAD AVANZAargentina/S90c0023bab11/2021318,97816.7%UnknownRecorded
FRENTE IZQUIERDA Y DE TRABAJADORES -UNIDADargentina/S90c0023bab11/2021150,8147.9%UnknownRecorded
AUTODETERMINACION Y LIBERTADargentina/S90c0023bab11/202158,0933%UnknownRecorded

Other events (not selected cycles)

  • 2015-07-05 · Ordinary · Legal certification not established
  • 2019-10-27 · Ordinary · Legal certification not established

4. Competition and volatility

competition index

Provisional imported-series CI

52.990–100 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=2.811018484240293, oldest_gap=21.368603194635917, previous_gap=18.594942381955146

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?
ADORNI MANUELSource roster entry2025LA LIBERTAD AVANZAunknown
SANTORO LEANDROSource roster entry2025ES AHORA BUENOS AIRESunknown
LOSPENNATO SILVIASource roster entry2025BUENOS AIRES PRIMEROunknown
PELAYO SOLANA AGUSTINASource roster entry2025LA LIBERTAD AVANZAunknown
NEGRI CLAUDIA VIVANASource roster entry2025ES AHORA BUENOS AIRESunknown
PAKGOJZ NICOLAS ALBERTOSource roster entry2025LA LIBERTAD AVANZAunknown
MOCHI FEDERICO PATRICIOSource roster entry2025ES AHORA BUENOS AIRESunknown
RODRIGUEZ LARRETA HORACIOSource roster entry2025VOLVAMOS BUENOS AIRESunknown
LOMBARDI HERNANSource roster entry2025BUENOS AIRES PRIMEROunknown
FREGUIA ANDREASource roster entry2025LA LIBERTAD AVANZAunknown
GONZALEZ ANDREA MARIANASource roster entry2025ES AHORA BUENOS AIRESunknown
ARENAZA JUAN PABLOSource roster entry2025LA LIBERTAD AVANZAunknown
MODARELLI JUAN PABLOSource roster entry2025ES AHORA BUENOS AIRESunknown
ALONSO LAURASource roster entry2025BUENOS AIRES PRIMEROunknown
MONTENEGRO LUCIA ELENASource roster entry2025LA LIBERTAD AVANZAunknown
GEMINIANI NOEMI AIDASource roster entry2025ES AHORA BUENOS AIRESunknown
SAIFERT LEONARDO LUISSource roster entry2025LA LIBERTAD AVANZAunknown
TAGLIAFERRI GUADALUPESource roster entry2025VOLVAMOS BUENOS AIRESunknown
NIETO DARIO HUGOSource roster entry2025BUENOS AIRES PRIMEROunknown
SALVATIERRA ALEJANDRO DAVIDSource roster entry2025ES AHORA BUENOS AIRESunknown
FLEITAS REBECA MARIA BELENSource roster entry2025LA LIBERTAD AVANZAunknown
ROSSEN BARBARA LAURASource roster entry2025ES AHORA BUENOS AIRESunknown
VARTABEDIAN DIEGO MANUELSource roster entry2025LA LIBERTAD AVANZAunknown
FIGUEROA ROCIO LAURASource roster entry2025BUENOS AIRES PRIMEROunknown
BIASI VANINASource roster entry2025FRENTE DE IZQUIERDA Y DE TRABAJADORES - UNIDADunknown
CAPORICCIO FRANCISO VICENTESource roster entry2025ES AHORA BUENOS AIRESunknown
KIENAST MARINASource roster entry2025LA LIBERTAD AVANZAunknown
FERNANDEZ JUAN IGNACIOSource roster entry2025LA LIBERTAD AVANZAunknown
IAÑEZ BERENICE LIASource roster entry2025ES AHORA BUENOS AIRESunknown
FERRARIO EMMANUEL ALBERTOSource roster entry2025VOLVAMOS BUENOS AIRESunknown

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

Official final vote series. Legislative returns are partial renewals. Latest actual-event sequence and current government require separate 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. “Buenos Aires — Legislature.” Subnational Election Observatory, releaselatin-america-fe5e91689def, snapshot 2026-09-13. /electiondatabase/offices/AR-CABA-D. Sources: argentina--url-eba07f639666dbf368de73bd, argentina--url-2460a702fc8c2c394965afb5, argentina--url-9eb7a69a2d84199ef6d009a3, argentina--url-cdff3893c84807ac7f64dd3c, argentina--url-7422a19b4a6417f232e6a7e2, argentina--url-02aa75fc89bd94045f5a4188, argentina--Sfed37562b9cf, argentina--S13f223ce67cf, argentina--S7ab93001376c, argentina--S90c0023bab11, argentina--Scba71aba4920, argentina--Sb15e0c128100, argentina--S2f0d020fc544.