Argentina · Ciudad Autónoma de Buenos Aires
Buenos Aires — Legislature
All 24 provincial jurisdictions are screened; 3,440 current provincial/local or shared-ballot units are registered. Recovered archives now cover all provinces. All 804 previously inaccessible Córdoba tribunal tables are restored, adding local histories and replacing provincial secondary vote transcriptions. Several local tiers have inventories or winner-only evidence without three full returns. Corrientes and Santiago del Estero executive cycles outside the window are excluded. Partial chamber renewals, Santa Fe commune reform, conventions and replacements remain distinct. Older local votes, selected certificates and 2027 office calls remain incomplete. Ten 2023 Catamarca local returns are recovered from DINE provisional table data through exact single-municipality department bridges; they remain excluded from complete-cycle metrics pending final-tally reconciliation.
Historical competition
Competitiveness index for a verified actual-event sequence withheld. Actual-event and/or comparability review incomplete.
Provisional imported-series CI: 53.0/100. This uses the three displayed comparison cycles and retains the open event/boundary audit. It does not confirm the latest three actual completed elections.
Current government and control: Unverified. Local government-risk forecast: unassessed.
National polling context: National presidential approval; context for subnational races — AtlasIntel / Bloomberg; fieldwork 2026-07-30 to 2026-08-03. Sample 1,120; reported margin of error ±3.00 percentage points. Earlier comparison wave; named officeholder and question wording retained. Poll report
National polling context: National presidential approval; context for subnational races — AtlasIntel / Bloomberg; fieldwork 2026-08-30 to 2026-09-03. Sample 2,193; reported margin of error ±2.00 percentage points. Approval rose 1.0 percentage point while disapproval fell 4.4 points; approval movement is smaller than the combined reported survey uncertainty. The negative approval balance remains a national headwind for Milei-aligned candidates, conditional on local alliance and incumbent identity. Poll report
Official final vote series. Legislative returns are partial renewals. Latest actual-event sequence and current government require separate verification.
Registry and evidence links: Source 1, Source 2, Source 3, Source 4, Source 5, Source 6
Electoral event evidence
Separate source records can belong to the same election cycle. Recounts, runoffs and void returns do not create additional cycles.
2025-05-18 · Ordinary election
Coverage: Official definitive vote return
Basis: Affirmative candidate/list votes; blank/null votes excluded. Legislative results describe the elected renewal cohort.
| Party or list | Candidate | Votes or marks | Vote share | Seats |
|---|---|---|---|---|
| La Libertad Avanza | 495,966 | 30.70% | 11 | |
| Alianza "Es Ahora Buenos Aires" | 450,559 | 27.89% | 10 | |
| Alianza "Buenos Aires Primero" | 262,027 | 16.22% | 5 | |
| Alianza "Volvamos Buenos Aires" | 133,108 | 8.24% | 3 | |
| Alianza "Frente de Izquierda y de Trabajadores- Unidad" | 52,031 | 3.22% | 1 | |
| Unión del Centro Democrático | 43,097 | 2.67% | 0 | |
| Coalición Civica — Afirmación para una República Igualitaria (ARI) | 41,128 | 2.55% | 0 | |
| Alianza "Evolución" | 38,054 | 2.36% | 0 | |
| Alianza "Principios y Valores" | 33,430 | 2.07% | 0 | |
| Movimiento de Integración y Desarrollo | 27,544 | 1.71% | 0 | |
| Alianza "Unión Porteña Libertaria" | 10,320 | 0.64% | 0 | |
| Seamos Libres | 8,360 | 0.52% | 0 | |
| La Izquierda en la Ciudad | 6,320 | 0.39% | 0 | |
| Alianza "Confluencia - Por La Igualdad y la Soberania" | 5,448 | 0.34% | 0 | |
| El Movimiento | 3,247 | 0.20% | 0 | |
| Frente Patriota Federal | 2,592 | 0.16% | 0 | |
| Movimiento Plural | 2,091 | 0.13% | 0 |
2023-10-22 · Ordinary election
Coverage: Official definitive vote return
Basis: Affirmative candidate/list votes; blank/null votes excluded. Legislative results describe the elected renewal cohort.
| Party or list | Candidate | Votes or marks | Vote share | Seats |
|---|---|---|---|---|
| Juntos por el Cambio | 890,976 | 49.73% | — | |
| Unión por la Patria | 557,808 | 31.13% | — | |
| La Libertad Avanza | 249,170 | 13.91% | — | |
| Frente de Izquierda Trabajadores – Unidad | 93,759 | 5.23% | — |
2021-11-14 · Ordinary election
Coverage: Official definitive vote return
Basis: Affirmative candidate/list votes; blank/null votes excluded. Legislative results describe the elected renewal cohort.
| Party or list | Candidate | Votes or marks | Vote share | Seats |
|---|---|---|---|---|
| JUNTOS POR EL CAMBIO | 891,983 | 46.83% | — | |
| FRENTE DE TODOS | 484,950 | 25.46% | — | |
| LA LIBERTAD AVANZA | 318,978 | 16.75% | — | |
| FRENTE IZQUIERDA Y DE TRABAJADORES -UNIDAD | 150,814 | 7.92% | — | |
| AUTODETERMINACION Y LIBERTAD | 58,093 | 3.05% | — |
2019-10-27 · Ordinary election
Coverage: Official definitive vote return
Basis: Affirmative candidate/list votes; blank/null votes excluded. Legislative results describe the elected renewal cohort.
| Party or list | Candidate | Votes or marks | Vote share | Seats |
|---|---|---|---|---|
| ALIANZA JUNTOS POR EL CAMBIO | 1,068,634 | 54.22% | — | |
| ALIANZA FRENTE DE TODOS | 667,732 | 33.88% | — | |
| ALIANZA CONSENSO FEDERAL | 107,237 | 5.44% | — | |
| FRENTE IZQ Y DE TRAB-UNIDAD | 92,233 | 4.68% | — | |
| UNITE POR LA LIBERTAD Y LA DIG | 35,243 | 1.79% | — |
2015-07-05 · Ordinary election
Coverage: Official definitive vote return
Basis: Affirmative candidate/list votes; blank/null votes excluded. Legislative results describe the elected renewal cohort.
| Party or list | Candidate | Votes or marks | Vote share | Seats |
|---|---|---|---|---|
| UNION PRO | 816,129 | 44.48% | — | |
| ENERGIA CIUD.ORGANIZADA | 431,324 | 23.51% | — | |
| FRENTE PARA LA VICTORIA | 380,806 | 20.76% | — | |
| FRTE DE IZQ.Y LOS TRABAJADORES | 88,686 | 4.83% | — | |
| AUTODETERMINACION Y LIBERTAD | 72,698 | 3.96% | — | |
| ALZ.CAMINO POPULAR | 45,075 | 2.46% | — |
Snapshot 13 September 2026. Fixed election window 8 September 2026 to 8 March 2028. Record AR-CABA-D.