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.

2015 Buenos Aires City elections

Mayoral election
← 2011 5 July 2015 (first round) 19 July 2015 (second round) 2019 →
Turnout	73.04% (first round) 69.38% (second round)
Nominee Horacio Rodríguez Larreta Martín Lousteau Party PRO Independent Alliance PRO Union ECO Running mate Diego Santilli Fernando Sánchez Popular vote 861,380 806,525 Percentage 51.64% 48.36%
First round results by commune Second round results by commune
Chief of Government before election Mauricio Macri PRO Elected Chief of Government Horacio Rodríguez Larreta PRO
City Legislature
← 2013 5 July 2015 2017 →
30 out of 60 seats in the City Legislature
Turnout	79.78%
Party Leader Vote % Seats +/– PRO Mauricio Macri 44.48 15 +3 ECO Martín Lousteau 23.51 7 −3 FPV-PJ Mariano Recalde 17.18 6 −1 FIT – Unidad Myriam Bregman 4.83 1 0 AyL Luis Zamora 3.96 1 +1 This lists parties that won seats. See the complete results below.

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.^[1]

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.^[2] 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.^[3]

Candidates

Coalition		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		List	Mayoral candidate	Candidate votes		Overall votes
				Votes	%	Votes	%
	PRO Union	Sigamos con el Cambio	Horacio Rodríguez Larreta	529,452		882,421	47,98
		Hay Equipo	Gabriela Michetti	352,969
	Organized Citizen Energy	Suma+	Martín Lousteau	332,225		413,465	22.48
		Transparencia y Gestión	Graciela Ocaña	76,873
		Abrimos BA	Andrés Borthagaray	4,367
	Front for Victory	Podemos vivir mejor	Mariano Recalde	228,900		348,282	18.94
		La Ciudad es el Otro	Gabriela Cerruti	40,598
		Frente Sí	Aníbal Ibarra	37,930
		Unidos por la Ciudad	Carlos Heller	26,881
		Ciudad para Todos	Gustavo Fernando López	7,905
		Revolución Urbana	Víctor Ramos	3,380
		Espacio Abierto Aluvión	Carlos Oviedo	2,688
	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
		Lista 2	Maru Lopes	3,402
		Lista 3	Martín Torres	3,226
		Lista 4	Sergio García	2,738
	Movement for the Common Good	Lista A	Gustavo Vera	11,917		14,585	0.78
		Lista B	Leonardo Fabre	2,668
	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
		Vientos de Cambio	Humberto Tumini	3,935
	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						1,829,526	100
Blank votes						20,533	1.09
Invalid votes						20,397	1.08
Total						1,880,136	97.82
Registered voters/turnout						2,555,967	73.56
Source:[4]

Chief of Government

Candidate		Running mate	Party	First round		Second round
				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				1,827,490	100.00	1,667,905	100.00
Valid votes				1,827,490	97.90	1,667,905	94.05
Invalid votes				4,627	0.25	15,567	0.88
Blank votes				34,628	1.85	89,927	5.07
Total votes				1,866,745	100.00	1,773,399	100.00
Registered voters/turnout				2,555,967	73.03	2,555,967	69.38
Source: [5]

Legislature

Distribution of seats in the City Legislature following the 2015 election:
  PRO Union (28)
  Organized Citizen Energy (14)
  Front for Victory (13)
  Workers' Left Front (2)
  Self-determination and Freedom (1)
  Renewal Front (1)
  Movement for the Common Good (1)

Party		Votes	%	Seats
				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		27,597	–	–	–	–
Invalid votes		4,630	–	–	–	–
Total		1,866,945	100	30	30	60
Registered voters/turnout		2,555,967	73.04
Source: [5]

See also

• 2015 Argentine general election
• 2015 Argentine provincial elections
• List of mayors and chiefs of government of Buenos Aires City