Argentina · Buenos Aires — TERCERA
LA MATANZA — Municipal shared ballot: mayor / council
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.
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
One shared municipal ballot is counted once. The council comparison uses 2025, 2023 and 2021; mayor elections are separately identifiable in the retained 2023, 2019 and 2015 returns. Council seats show the renewal cohort. Current control, special events and the 2027 call remain unverified.
Registry and evidence links: Source 1, Source 2, Source 3, Source 4, Source 5
Electoral event evidence
Separate source records can belong to the same election cycle. Recounts, runoffs and void returns do not create additional cycles.
2025-09-07 · Council midterm renewal
Coverage: Certified election-board return; extracted votes and contested seats reconciled
Basis: Shared municipal party ballot. Seats are councillors elected in this renewal, not the full council. Mayor and school-council allocations remain separate fields.
| Party or list | Candidate | Votes or marks | Vote share | Seats |
|---|---|---|---|---|
| ALIANZA FUERZA PATRIA | 359,389 | 52.86% | 8 | |
| ALIANZA LA LIBERTAD AVANZA | 196,559 | 28.91% | 4 | |
| FTE. DE IZQUIERDA Y DE TRABAJADORES - UNIDAD | 52,815 | 7.77% | 0 | |
| ALIANZA NUEVOS AIRES | 21,671 | 3.19% | 0 | |
| ALIANZA SOMOS BUENOS AIRES | 10,022 | 1.47% | 0 | |
| ALIANZA UNION Y LIBERTAD | 7,756 | 1.14% | 0 | |
| ALIANZA POTENCIA | 6,321 | 0.93% | 0 | |
| PARTIDO POLITICA OBRERA | 5,543 | 0.82% | 0 | |
| ALIANZA UNION LIBERAL | 4,098 | 0.60% | 0 | |
| MOVIMIENTO AVANZADA SOCIALISTA | 3,986 | 0.59% | 0 | |
| PARTIDO FRENTE PATRIOTA FEDERAL | 3,227 | 0.47% | 0 | |
| PARTIDO LIBERTARIO | 2,254 | 0.33% | 0 | |
| CONSTRUYENDO PORVENIR | 2,205 | 0.32% | 0 | |
| VALORES REPUBLICANOS | 1,873 | 0.28% | 0 | |
| PARTIDO TIEMPO DE TODOS | 1,829 | 0.27% | 0 | |
| ALIANZA ES CON VOS ES CON NOSOTROS | 326 | 0.05% | 0 |
Result source · PDF pages 64, 65
2023-10-22 · Municipal shared ballot
Coverage: Certified election-board return; extracted votes and contested seats reconciled
Basis: Shared municipal party ballot. Seats are councillors elected in this renewal, not the full council. Mayor and school-council allocations remain separate fields.
Mayor elected party: UNION POR LA PATRIA. The seats column below covers the council renewal only.
| Party or list | Candidate | Votes or marks | Vote share | Seats |
|---|---|---|---|---|
| UNION POR LA PATRIA | 418,256 | 53.73% | 7 | |
| LA LIBERTAD AVANZA | 174,430 | 22.41% | 3 | |
| JUNTOS POR EL CAMBIO | 143,504 | 18.44% | 2 | |
| FRENTE DE IZQUIERDA Y TRABAJADORES UNIDAD | 42,231 | 5.43% | 0 |
Result source · PDF pages 56
2021-11-14 · Council midterm renewal
Coverage: Certified election-board return; extracted votes and contested seats reconciled
Basis: Shared municipal party ballot. Seats are councillors elected in this renewal, not the full council. Mayor and school-council allocations remain separate fields.
| Party or list | Candidate | Votes or marks | Vote share | Seats |
|---|---|---|---|---|
| FRENTE DE TODOS | 343,707 | 46.63% | 6 | |
| ALIANZA JUNTOS | 208,822 | 28.33% | 4 | |
| FRENTE DE IZQUIERDA Y DE TRABAJADORES - | 71,331 | 9.68% | 2 | |
| ALIANZA AVANZA LIBERTAD | 52,773 | 7.16% | 0 | |
| FRENTE VAMOS CON VOS | 34,394 | 4.67% | 0 | |
| PARTIDO UNION CELESTE Y BLANCO | 25,993 | 3.53% | 0 |
Result source · PDF pages 57
2019-10-27 · Municipal shared ballot
Coverage: Certified election-board return; extracted votes and contested seats reconciled
Basis: Shared municipal party ballot. Seats are councillors elected in this renewal, not the full council. Mayor and school-council allocations remain separate fields.
Mayor elected party: FRENTE DE TODOS. The seats column below covers the council renewal only.
| Party or list | Candidate | Votes or marks | Vote share | Seats |
|---|---|---|---|---|
| FRENTE DE TODOS | 531,031 | 64.18% | 9 | |
| JUNTOS POR EL CAMBIO | 206,745 | 24.99% | 3 | |
| CONSENSO FEDERAL | 44,365 | 5.36% | 0 | |
| FTE DE IZQ. Y DE TRABAJADORES-UNIDAD | 30,734 | 3.71% | 0 | |
| FRENTE NOS | 14,493 | 1.75% | 0 |
Result source · PDF pages 57
2015-10-25 · Municipal shared ballot
Coverage: Certified election-board return; extracted votes and contested seats reconciled
Basis: Shared municipal party ballot. Seats are councillors elected in this renewal, not the full council. Mayor and school-council allocations remain separate fields.
Mayor elected party: ALIANZA FRENTE PARA LA VICTORIA. The seats column below covers the council renewal only.
| Party or list | Candidate | Votes or marks | Vote share | Seats |
|---|---|---|---|---|
| ALIANZA FRENTE PARA LA VICTORIA | 352,422 | 47.74% | 6 | |
| ALIANZA CAMBIEMOS BUENOS AIRES | 189,487 | 25.67% | 3 | |
| ALIANZA UNIDOS POR UNA NUEVA ALTERNATIVA | 143,234 | 19.40% | 3 | |
| AZA. FTE. DE IZQUIERDA Y LOS TRABAJADORES | 34,209 | 4.63% | 0 | |
| ALIANZA PROGRESISTAS | 18,896 | 2.56% | 0 |
Result source · PDF pages 56
Snapshot 13 September 2026. Fixed election window 8 September 2026 to 8 March 2028. Record AR-PBA-M-061.