# 2023 Buenos Aires City elections

General elections were held in the City of Buenos Aires on 22 October 2023, coinciding with the general election being held nationwide. The Chief of Government (mayor), half of the City Legislature and all 150 members of the communal boards were elected to four-year terms.
In the mayoral election, Jorge Macri, of the ruling PRO party, won in the first round of voting with 49.67% of the vote. According to the city's constitution, a candidate for Chief of Government must achieve over 50% of the vote in order to win in the first round, but the second-most voted candidate, Leandro Santoro of Union for the Homeland, dropped out of the race for the second round and ceded victory to Macri.
This was the seventh general election in the City of Buenos Aires since the adoption of the 1996 Constitution, which granted autonomy to the city and allowed it to vote for its own Chief of Government. It was also the second election in which the Single Electronic Ballot (Boleta Única Electrónica, BUE) voting system was implemented, after 2015.

## Background

The 2019 elections in Buenos Aires had resulted in the re-election of incumbent Chief of Government Horacio Rodríguez Larreta with a record 55.90% of the vote in the first round. Rodríguez Larreta's party, Republican Proposal (PRO) and its Juntos por el Cambio alliance also remained the largest force in the City Legislature.
On 13 April 2023, Rodríguez Larreta issued a decree making the 2023 elections in Buenos Aires concurrent with the national general election. Rodríguez Larreta was constitutionally barred from running for re-election a second time, and instead launched his presidential run.
This was the second election in which the Single Electronic Ballot (Boleta Única Electrónica, BUE) voting system was implemented, after 2015. It was, however, the first time the BUE system was implemented in a local election concurrent with a national election, which meant two different voting systems were used in the same election day.

## Candidates

| Mayoral candidate (party) Prior political experience | Vice mayoral candidate (party) Prior political experience | Parties |
| Jorge Macri (PRO) Cabinet Chief (2021–2023) Mayor of Vicente López (2011–2021) | Clara Muzzio (PRO) Minister of Public Space and Urban Hygiene (2019–2023) | PRO UCR CC-ARI PS PDP UCEDÉ UNIR GEN PDC PRF ERF |
| Leandro Santoro (MNA) National Deputy (2021–2023) City Legislator (2019–2021) | Bárbara Rossen (PJ) | PJ FR FPG FG PV ND Kolina PI CF NE PSOL FORJA PF PC PTP PSA SL |
| Ramiro Marra (PL) City Legislator (2021–present) | Eduardo Martino (Ind.) | MID UNITE PD |
| Vanina Biasi (PO) | Jessica Gentile (MST) | PO PTS MST IS |

## Opinion polling

| Pollster/client(s) | Date(s) conducted | Sample size | Macri JxC | Santoro UP | Marra LLA | Biasi FIT-U | Others | Blank | Abst. Undec. | Lead |
| 2023 city elections | 22 Oct 2023 | – | 49.7 | 32.3 | 13.8 | 4.2 | – | 11 | 35.8 | 17.4 |
| Circuitos | 10-11 Oct 2023 | 1,129 | 44.5 | 23.1 | 21.9 | 2.9 | – | 3.1 | 4.5 | 21.4 |
| Opina Argentina | 6-10 Oct 2023 | 820 | 44 | 22 | 20 | 3 | – | 6 | 5 | 22 |
| Proyección Consultores | 5-10 Oct de 2023 | 1,287 | 47.5 | 26.7 | 19.4 | 2.8 | – | – | 3.6 | 20.8 |
| Federico González & Asociados | 28-30 Sep 2023 | 1,200 | 45.8 | 25.8 | 24.8 | 3.7 | – | – | – | 20 |
| Federico González & Asociados | 6-8 Sep 2023 | 1,000 | 46.7 | 23.0 | 22.7 | 4.0 | – | 3.3 | 7.5 | 23.7 |
| Circuitos | 24-26 Aug 2023 | 1,197 | 42.3 | 21.9 | 20.4 | 2.7 | – | 7.5 | 5-2 | 20.4 |
| CB Consultora | 22-24 Aug 2023 | 1,105 | 41.6 | 22.5 | 18 | 3.7 | – | 7 | 7.2 | 19.1 |
| 2023 primary elections | 13 Aug 2023 | – | 55.9 | 22.1 | 12.9 | 3.6 | 2.5 | 2.7 | 37.5 | 33.7 |
| Federico González & Asociados | 31 Jul - 3 Aug 2023 | 1,000 | 47.9 | 24.4 | 19 | 3.8 | 0.6 | 4.3 | 9.9 | 23.5 |
| Federico González & Asociados | 17-19 Jul 2023 | 1,400 | 45.4 | 20.5 | 16.1 | 2.4 | 1 | 3.2 | 9.3 | 24.9 |
| Circuitos | 3-5 Jul 2023 | 1,177 | 49.6 | 16.9 | 15.7 | 2.3 | 7.4 | 8.1 | - | 32,7 |
| Consultora Tendencias | 2-5 Jun 2023 | 2,506 | 46.8 | 19.7 | 8.8 | 5.1 | 2.3 | 4.2 | 13.1 | 27.1 |
| Federico González & Asociados | 1-5 Jun 2023 | 1,400 | 36.7 | 20.7 | 24.5 | 1.4 | 1.4 | 5.4 | 9.9 | 12.2 |
| Federico González & Asociados | 1-5 Jun 2023 | 1,400 | 41 | 21.3 | 22.1 | 1.4 | 1.3 | 4.3 | 8.6 | 18.9 |
| Federico González & Asociados | 29 Apr - 1 May 2023 | 1,400 | 48.1 | 20 | 15.4 | 0.6 | 1 | 3.6 | 10.4 | 28.1 |
| Circuitos | 26-28 Apr 2023 | 1,192 | 48.6 | 20.8 | 13.9 | 2.1 | 2.5 | 12.1 | - | 27.8 |
| Federico González & Asociados | 2-3 Apr 2023 | 800 | 42.5 | 20.2 | 18.7 | 3.1 | 5.2 | 2.6 | 7.7 | 22.3 |
| Solmoirago | Mar 2023 | 400 | 55.3 | 20.9 | 9.9 | 3.1 | - | - | 10.8 | 34.4 |
| Consultora Tendencias | 13-18 Mar 2023 | 746 | 46.8 | 23.7 | 11.1 | 5.2 | 1.8 | 3.1 | 8.3 | 23.1 |
| Circuitos | 13-14 Mar 2023 | 1,196 | 49.5 | 21 | 12.9 | 6.1 | - | 10.5 | - | 28.5 |
| Opina Argentina | 25-27 Feb 2023 | 800 | 47 | 22 | 17 | 4 | 4 | 2 | 4 | 25 |
| Federico González & Asociados | 21-22 Feb 2023 | 800 | 42.4 | 20.5 | 19.1 | 4.2 | 3.1 | 3.1 | 7.6 | 21.9 |
| Opinaia | 5-17 Feb 2023 | 500 | 48 | 16 | 13 | 3 | - | 7 | 13 | 32 |
| Circuitos | 8-10 Feb 2023 | 1,184 | 47.1 | 21.2 | 14 | 5.4 | - | 12.3 | - | 25.9 |
| Federico González & Asociados | 15-16 Jan 2023 | 800 | 40.4 | 21.8 | 22.3 | 4.1 | 0.5 | 3.2 | 7.7 | 18.1 |
| Opinaia | 2-9 Jan 2023 | 510 | 46 | 14 | 12 | 4 | - | 4 | 18 | 32 |
* ↑ With Martín Lousteau as JxC candidate for mayor
* ↑ With Jorge Macri as JxC candidate for mayor

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

| Coalition | Coalition | List | Mayoral candidate | Candidate votes | Candidate votes | Overall votes | Overall votes |
| Coalition | Coalition | List | Mayoral candidate | Votes | % | Votes | % |
| | Juntos por el Cambio | Vayamos por más | Jorge Macri | 540,132 | 29.52 | 1,051,866 | 55.93 |
| | Juntos por el Cambio | Evolución | Martín Lousteau | 511,734 | 27.97 | 1,051,866 | 55.93 |
| | Union for the Homeland | Alternativa para Ganar Buenos Aires | Leandro Santoro | 416,919 | 22.17 | 416,919 | 22.17 |
| | La Libertad Avanza | La Ciudad Avanza | Ramiro Marra | 243,202 | 12.93 | 243,202 | 12.93 |
| | Worker's Left Front-Unity | Unidad de Luchadores y la Izquierda | Vanina Biasi | 45,608 | 2.49 | 68,670 | 3.65 |
| | Worker's Left Front-Unity | Unir y Fortalecer la Izquierda | Jorge Adaro | 23.062 | 1.26 | 68,670 | 3.65 |
| | Principles and Values | Celeste y Blanca | Eduardo Graham | 15,133 | 0.81 | 15,133 | 0.81 |
| | Workers' Policy | Unidad Obrera | Valentina Viglieca | 8,800 | 0.47 | 8,800 | 0.47 |
| | Freemen of the South Movement | Alternativa Progresista | Adolfo Andrés Buzzo Pipet | 7,250 | 0.39 | 7,250 | 0.39 |
| | The Left in the City | Izquierda Anticapitalista | Héctor Antonio Heberling | 7,227 | 0.38 | 7,227 | 0.38 |
| | Renovating Aptitude | Primero los Porteños | Juan Pablo Chiesa | 5,253 | 0.28 | 5,253 | 0.28 |
| | Patriot Front | Primero la Patria | Alejandro Gustavo Nizzero | 5,206 | 0.28 | 5,206 | 0.28 |
| 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 | 51,053 | 2.71 |
| Invalid votes | Invalid votes | Invalid votes | Invalid votes | Invalid votes | Invalid votes | 3,362 | 0.18 |
| Total | Total | Total | Total | Total | Total | 1,883,941 | 97.29 |
| Registered voters/turnout | Registered voters/turnout | Registered voters/turnout | Registered voters/turnout | Registered voters/turnout | Registered voters/turnout | 3,014,213 | 62.50 |
| Source: ||||||||

### Chief of Government

| Candidate | Candidate | Running mate | Party | Votes | % |
| | Jorge Macri | Clara Muzzio | Juntos por el Cambio | 895,131 | 49.68 |
| | Leandro Santoro | Bárbara Rossen | Union for the Homeland | 581,450 | 32.27 |
| | Ramiro Marra | Eduardo Martino | La Libertad Avanza | 248,263 | 13.78 |
| | Vanina Biasi | Jessica Gentile | Workers' Left Front | 77,077 | 4.28 |
| Total | Total | Total | Total | 1,801,921 | 100.00 |
| Valid votes | Valid votes | Valid votes | Valid votes | 1,801,921 | 88.39 |
| Invalid votes | Invalid votes | Invalid votes | Invalid votes | 14,335 | 0.70 |
| Blank votes | Blank votes | Blank votes | Blank votes | 222,383 | 10.91 |
| Total votes | Total votes | Total votes | Total votes | 2,038,639 | 100.00 |
| Registered voters/turnout | Registered voters/turnout | Registered voters/turnout | Registered voters/turnout | 3,177,558 | 64.16 |
| Source: ||||||

#### Results by commune

* Communes won by Macri
* Communes won by Santoro
| Commune | Macri (JxC) | Macri (JxC) | Santoro (UP) | Santoro (UP) | Marra (LLA) | Marra (LLA) | Biasi (FIT-U) | Biasi (FIT-U) | Total votes |
| Commune | Votes | % | Votes | % | Votes | % | Votes | % | Total votes |
| Comuna 1 | 55,979 | 47.37 | 37,633 | 31.84 | 19,274 | 16.31 | 5,292 | 4.48 | 118,178 |
| Comuna 2 | 63,506 | 65.96 | 18,584 | 19.30 | 11,742 | 12.19 | 2,453 | 2.55 | 96,285 |
| Comuna 3 | 46,281 | 43.74 | 37,132 | 35.10 | 17,210 | 16.27 | 5,175 | 4.89 | 105,798 |
| Comuna 4 | 48,509 | 39.19 | 48,558 | 39.23 | 19,931 | 16.11 | 6,773 | 5.47 | 123,771 |
| Comuna 5 | 50,599 | 45.42 | 41,297 | 37.07 | 14,133 | 12.69 | 5,364 | 4.82 | 111,393 |
| Comuna 6 | 61,774 | 52.33 | 38,407 | 32.53 | 13,024 | 11.03 | 4,851 | 4.11 | 118,056 |
| Comuna 7 | 56,101 | 44.30 | 44,880 | 35.44 | 19,797 | 15.63 | 5,848 | 4.62 | 126,626 |
| Comuna 8 | 33,998 | 33.07 | 43,089 | 41.91 | 20,319 | 19.76 | 5,406 | 5.26 | 102,812 |
| Comuna 9 | 45,488 | 42.59 | 38,449 | 35.99 | 17,580 | 16.46 | 5,301 | 4.96 | 106,818 |
| Comuna 10 | 50,715 | 47.34 | 36,228 | 33.82 | 14,988 | 13.99 | 5,191 | 4.85 | 107.122 |
| Comuna 11 | 64,030 | 51.05 | 39,921 | 31.83 | 16,272 | 12.98 | 5,191 | 4.14 | 125,417 |
| Comuna 12 | 75,285 | 54.04 | 42,374 | 30.42 | 16,125 | 11.58 | 5,523 | 3.96 | 139,307 |
| Comuna 13 | 98,201 | 63.09 | 35,702 | 22.94 | 17,009 | 10.93 | 4,740 | 3.04 | 155,652 |
| Comuna 14 | 90,686 | 62.05 | 34,355 | 23.51 | 16,763 | 11.47 | 4.341 | 2.97 | 146,145 |
| Comuna 15 | 53,826 | 45.81 | 44,130 | 37.56 | 13,987 | 11.90 | 5,559 | 4.73 | 117,502 |
| Prisons | 153 | 14.73 | 711 | 68.43 | 109 | 10.49 | 66 | 6.35 | 1,039 |
| Total | 895,131 | 49.67 | 581,450 | 32.27 | 248,263 | 13.78 | 77,077 | 4.28 | 1,801,921 |

### Legislature

| Party | Party | Votes | % | Seats | Seats | Seats |
| Party | Party | Votes | % | Not up | Won | Total |
| | Juntos por el Cambio | 890,976 | 49.73 | 15 | 15 | 30 |
| | Union for the Homeland | 557,808 | 31.13 | 8 | 10 | 18 |
| | La Libertad Avanza | 249,170 | 13.91 | 5 | 4 | 9 |
| | Workers' Left Front – Unity | 93,759 | 5.23 | 2 | 1 | 3 |
| Blank votes | Blank votes | 232,779 | – | – | – | – |
| Invalid votes | Invalid votes | 14,147 | – | – | – | – |
| Total | Total | 5,384,870 | 100 | 30 | 30 | 60 |
| Registered voters/turnout | Registered voters/turnout | 3,177,558 | 64.16 | 30 | 30 | 60 |
| Source: |||||||