# 2015 Buenos Aires City elections

General elections were held in the City of Buenos Aires on 5 July 2015 to elect the Chief of Government (mayor), half of the City Legislature and all 150 members of the communal boards to four-year terms. As no mayoral candidate won a majority in the first round, a runoff was held on 19 July, in which Horacio Rodríguez Larreta, of the governing Republican Proposal (PRO) party, defeated Martín Lousteau and his Organized Citizen Energy (ECO) coalition to become Chief of Government of Buenos Aires.
Incumbent Chief of Government Mauricio Macri was term-limited, and instead ran a successful presidential campaign in October 2015. The City Legislature remained controlled by the governing Republican Proposal (PRO) party and its coalition, PRO Union.
This was the first election in which the Single Electronic Ballot (Boleta Única Electrónica, BUE) voting system was implemented.

## Background

The 2011 elections in Buenos Aires had resulted in the re-election of incumbent Chief of Government Mauricio Macri in the second round against FPV candidate Daniel Filmus. Macri's party, Republican Proposal (PRO), also remained the largest force in the City Legislature.
The electoral laws of the City of Buenos Aires determined the local elections could not be held concurrently with the nationwide general election being held the same year. The election was thus set for 5 July 2015, with primaries being held on 26 April 2015.
This was the first election in which the Single Electronic Ballot (Boleta Única Electrónica, BUE) voting system was implemented. The use of the new electronic system was subject to controversy and criticism from opposition figures, such as leading candidate Martín Lousteau, who claimed the system was not secure and transparent enough.

## Candidates

| Mayoral candidate (party) Prior political experience | Vice mayoral candidate (party) Prior political experience | Parties |
| Horacio Rodríguez Larreta (PRO) Cabinet Chief (2007–2015) | Diego Santilli (PRO) National Senator (2013–2015) | PRO PDP PD FE UCEDE MID UPL PAC |
| Martín Lousteau (Ind.) Minister of Economy of Argentina (2007–2008) | Fernando Sánchez (CC-ARI) National Deputy (2013–2017) | UCR CC-ARI PS CF PSA |
| Mariano Recalde (PJ) President of Aerolíneas Argentinas (2009–2015) | Leandro Santoro (UCR) | PJ FR FPG FG PV ND Kolina PI CF NE PSOL FORJA PF PC PTP RxBA ParTE |
| Luis Zamora National Deputy (2001–2005) | Sergio Sallustio | AyL |
| Myriam Bregman National Deputy (2015–2016) | José Castillo | PO PTS IS |

## Results
### Primaries
#### Mayoral primaries

| Coalition | Coalition | List | Mayoral candidate | Candidate votes | Candidate votes | Overall votes | Overall votes |
| Coalition | Coalition | List | Mayoral candidate | Votes | % | Votes | % |
| | PRO Union | Sigamos con el Cambio | Horacio Rodríguez Larreta | 529,452 | | 882,421 | 47,98 |
| | PRO Union | Hay Equipo | Gabriela Michetti | 352,969 | | 882,421 | 47,98 |
| | Organized Citizen Energy | Suma+ | Martín Lousteau | 332,225 | | 413,465 | 22.48 |
| | Organized Citizen Energy | Transparencia y Gestión | Graciela Ocaña | 76,873 | | 413,465 | 22.48 |
| | Organized Citizen Energy | Abrimos BA | Andrés Borthagaray | 4,367 | | 413,465 | 22.48 |
| | Front for Victory | Podemos vivir mejor | Mariano Recalde | 228,900 | | 348,282 | 18.94 |
| | Front for Victory | La Ciudad es el Otro | Gabriela Cerruti | 40,598 | | 348,282 | 18.94 |
| | Front for Victory | Frente Sí | Aníbal Ibarra | 37,930 | | 348,282 | 18.94 |
| | Front for Victory | Unidos por la Ciudad | Carlos Heller | 26,881 | | 348,282 | 18.94 |
| | Front for Victory | Ciudad para Todos | Gustavo Fernando López | 7,905 | | 348,282 | 18.94 |
| | Front for Victory | Revolución Urbana | Víctor Ramos | 3,380 | | 348,282 | 18.94 |
| | Front for Victory | Espacio Abierto Aluvión | Carlos Oviedo | 2,688 | | 348,282 | 18.94 |
| | Worker's Left Front | Lista Unidad | Myriam Bregman | 41,719 | 2.24 | 41,719 | 2.24 |
| | Self-determination and Freedom | Caminamos Preguntando | Luis Zamora | 37,885 | 2.06 | 37,885 | 2.06 |
| | People's Way Alliance | Otro Camino para Gobernar | Claudio Lozano | 26,810 | 1.44 | 26,810 | 1.44 |
| | Front for Buenos Aires | Frente Renovador | Guillermo Nielsen | 16,742 | 0.91 | 16,742 | 0.91 |
| | MST - New Left | Lista 1 | Héctor Bidonde | 7,104 | | 16,470 | 0.89 |
| | MST - New Left | Lista 2 | Maru Lopes | 3,402 | | 16,470 | 0.89 |
| | MST - New Left | Lista 3 | Martín Torres | 3,226 | | 16,470 | 0.89 |
| | MST - New Left | Lista 4 | Sergio García | 2,738 | | 16,470 | 0.89 |
| | Movement for the Common Good | Lista A | Gustavo Vera | 11,917 | | 14,585 | 0.78 |
| | Movement for the Common Good | Lista B | Leonardo Fabre | 2,668 | | 14,585 | 0.78 |
| | It's Possible Party | Compromiso Federal | Ivo Cutzarida | 10,811 | 0.58 | 10,811 | 0.58 |
| | SURGEN | Ciudad Justa | Sergio Abrevaya | 4,296 | | 8,231 | 0,44 |
| | SURGEN | Vientos de Cambio | Humberto Tumini | 3,935 | | 8,231 | 0,44 |
| | Alternative Buenos Aires | Lista A | Pablo Ferreyra | 7,576 | 0.41 | 7,576 | 0.41 |
| | Movement for Socialism | Unidad de la Izquierda | Manuela Castañeira | 5,896 | 0.32 | 5,896 | 0.32 |
| | Humanist Party | Lista Única | Gustavo Tenaglia | 4,185 | 0.23 | 4,185 | 0.23 |
| | Neighborhood Flag | Lista Común | Ramiro Vasena | 2,486 | 0.13 | 2,486 | 0.13 |
| | Federal Movement | Lista Celeste y Blanca | Enrique Piragini | 1,642 | 0.09 | 1,642 | 0.09 |
| Valid votes | Valid votes | Valid votes | Valid votes | Valid votes | Valid votes | 1,829,526 | 100 |
| Blank votes | Blank votes | Blank votes | Blank votes | Blank votes | Blank votes | 20,533 | 1.09 |
| Invalid votes | Invalid votes | Invalid votes | Invalid votes | Invalid votes | Invalid votes | 20,397 | 1.08 |
| Total | Total | Total | Total | Total | Total | 1,880,136 | 97.82 |
| Registered voters/turnout | Registered voters/turnout | Registered voters/turnout | Registered voters/turnout | Registered voters/turnout | Registered voters/turnout | 2,555,967 | 73.56 |
| Source: ||||||||

### Chief of Government

| Candidate | Candidate | Running mate | Party | First round | First round | Second round | Second round |
| Candidate | Candidate | Running mate | Party | Votes | % | Votes | % |
| | Horacio Rodríguez Larreta | Diego Santilli | PRO Union | 832,619 | 45.56 | 861,380 | 51.64 |
| | Martín Lousteau | Fernando Sánchez | Organized Citizen Energy | 465,583 | 25.48 | 806,525 | 48.36 |
| | Mariano Recalde | Leandro Santoro | Front for Victory | 400,522 | 21.92 | | |
| | Luis Zamora | Sergio Sallustio | Self-determination and Freedom | 72,149 | 3.95 | | |
| | Myriam Bregman | José Castillo | Workers' Left Front | 56,617 | 3.10 | | |
| Total | Total | Total | Total | 1,827,490 | 100.00 | 1,667,905 | 100.00 |
| Valid votes | Valid votes | Valid votes | Valid votes | 1,827,490 | 97.90 | 1,667,905 | 94.05 |
| Invalid votes | Invalid votes | Invalid votes | Invalid votes | 4,627 | 0.25 | 15,567 | 0.88 |
| Blank votes | Blank votes | Blank votes | Blank votes | 34,628 | 1.85 | 89,927 | 5.07 |
| Total votes | Total votes | Total votes | Total votes | 1,866,745 | 100.00 | 1,773,399 | 100.00 |
| Registered voters/turnout | Registered voters/turnout | Registered voters/turnout | Registered voters/turnout | 2,555,967 | 73.03 | 2,555,967 | 69.38 |
| Source: ||||||||

### Legislature

| Party | Party | Votes | % | Seats | Seats | Seats |
| Party | Party | Votes | % | Not up | Won | Total |
| | PRO Union | 816,129 | 44.48 | 12 | 15 | 28 |
| | Organized Citizen Energy | 431,324 | 23.51 | 7 | 7 | 14 |
| | Front for Victory | 380,806 | 20.76 | 7 | 6 | 12 |
| | Workers' Left Front | 88,686 | 4.83 | 2 | 1 | 3 |
| | Self-determination and Freedom | 72,698 | 3.96 | 0 | 1 | 1 |
| | People's Way Alliance | 45,075 | 2.46 | 0 | 0 | 0 |
| Blank votes | Blank votes | 27,597 | – | – | – | – |
| Invalid votes | Invalid votes | 4,630 | – | – | – | – |
| Total | Total | 1,866,945 | 100 | 30 | 30 | 60 |
| Registered voters/turnout | Registered voters/turnout | 2,555,967 | 73.04 | 30 | 30 | 60 |
| Source: |||||||