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 Coalition Mayoral candidate (party) Vice mayoral candidate (party) Parties Jorge Macri (PRO)Cabinet Chief (2021–2023)Mayor of Vicente López (2011–2021) Clara Muzzio (PRO)Minister of Public Spaceand 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)conductedSamplesize Macri Santoro Marra Biasi OthersBlankAbst.Undec.Lead 2023 city elections 22 Oct 2023 – 49.7 32.3 13.8 4.2 – 11 35.8 17.4Circuitos10-11 Oct 20231,12944.523.121.92.9 –3.14.521.4Opina Argentina6-10 Oct 20238204422203 –6522Proyección Consultores5-10 Oct de 20231,28747.526.719.42.8 – –3.620.8Federico González & Asociados28-30 Sep 20231,20045.825.824.83.7 – – –20Federico González & Asociados6-8 Sep 20231,00046.723.022.74.0 –3.37.523.7Circuitos24-26 Aug 20231,19742.321.920.42.7 –7.55-220.4CB Consultora22-24 Aug 20231,10541.622.5183.7 –77.219.1 2023 primary elections 13 Aug 2023 – 55.9 22.1 12.9 3.6 2.5 2.7 37.5 33.7Federico González & Asociados31 Jul - 3 Aug 20231,00047.924.4193.80.64.39.923.5Federico González & Asociados17-19 Jul 20231,40045.420.516.12.413.29.324.9Circuitos3-5 Jul 20231,17749.6 16.9 15.7 2.3 7.4 8.1 -32,7Consultora Tendencias2-5 Jun 20232,50646.8 19.7 8.8 5.1 2.3 4.2 13.127.1Federico González & Asociados1-5 Jun 20231,40036.7 20.7 24.5 1.4 1.4 5.4 9.912.241 21.3 22.1 1.4 1.3 4.3 8.618.9Federico González & Asociados29 Apr - 1 May 20231,40048.1 20 15.4 0.6 1 3.6 10.428.1Circuitos26-28 Apr 20231,19248.6 20.8 13.9 2.1 2.5 12.1 -27.8Federico González & Asociados2-3 Apr 202380042.5 20.2 18.7 3.1 5.2 2.6 7.722.3SolmoiragoMar 202340055.3 20.9 9.9 3.1 - - 10.834.4Consultora Tendencias13-18 Mar 202374646.8 23.7 11.1 5.2 1.8 3.1 8.323.1Circuitos13-14 Mar 20231,19649.5 21 12.9 6.1 - 10.5 -28.5Opina Argentina25-27 Feb 202380047 22 17 4 4 2 425Federico González & Asociados21-22 Feb 202380042.4 20.5 19.1 4.2 3.1 3.1 7.621.9Opinaia5-17 Feb 202350048 16 13 3 - 7 1332Circuitos8-10 Feb 20231,184 47.1 21.2 14 5.4 - 12.3 -25.9Federico González & Asociados15-16 Jan 202380040.4 21.8 22.3 4.1 0.5 3.2 7.718.1Opinaia2-9 Jan 2023510 46 14 12 4 - 4 1832

Results Primaries Mayoral primaries CoalitionListMayoral candidateCandidate votesOverall votesVotes%Votes%Juntos por el CambioJorge Macri 540,132 29.521,051,86655.93Martín Lousteau 511,734 27.97Union for the HomelandLeandro Santoro 416,919 22.17 416,919 22.17La Libertad AvanzaRamiro Marra 243,202 12.93 243,202 12.93Worker's Left Front-UnityVanina Biasi 45,608 2.4968,6703.65Jorge Adaro 23.062 1.26Principles and ValuesEduardo Graham 15,133 0.81 15,133 0.81Workers' PolicyValentina Viglieca 8,800 0.47 8,800 0.47Freemen of the South MovementAdolfo Andrés Buzzo Pipet 7,250 0.39 7,250 0.39The Left in the CityHéctor Antonio Heberling 7,227 0.38 7,227 0.38Renovating AptitudeJuan Pablo Chiesa 5,253 0.28 5,253 0.28Patriot FrontAlejandro Gustavo Nizzero 5,206 0.28 5,206 0.28 Valid votes 1,829,526 100Blank votes 51,053 2.71Invalid votes 3,362 0.18 Total 1,883,941 97.29 Registered voters/turnout 3,014,213 62.50Source:

Chief of Government

Results by commune

Communes won by MacriCommunes won by Santoro

Commune Macri(JxC) Santoro(UP) Marra(LLA) Biasi(FIT-U) Total votes Votes % Votes % Votes % 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

See also 2023 Argentine general election 2023 Argentine provincial elections 2023 Buenos Aires provincial election

References

External links Electoral Tribunal of Buenos Aires