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127 of the 257 seats in the Chamber of Deputies | |||||||||||||||||||||||||||||||||
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24 of 72 seats in the Senate | |||||||||||||||||||||||||||||||||
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Legislative elections are scheduled to be held in Argentina on 26 October 2025. [1] Half of the seats in the Chamber of Deputies and a third of the seats in the Senate will be elected. [2]
These midterm elections will be the first during the presidency of Javier Milei. [3]
The 2025 elections will be the first in which the unified paper ballot (in Spanish : Boleta Única de Papel, BUP) system is used, following a 2024 reform of the electoral law. [4] It will also be the first national election since 2011 without Open, Mandatory and Simultaneous Primaries (PASO); the PASO primary system was suspended ahead of the 2025 contest but is still legally in place. [5]
The 257 members of the Chamber of Deputies are elected by proportional representation in 24 multi-member constituencies based on the provinces (plus the City of Buenos Aires). Seats are allocated using the d'Hondt method with a 3% electoral threshold. [6] In the 2025 election, 127 of the 257 seats are up for renewal for a four-year term. [7]
Province | Seats | Seats at stake |
---|---|---|
Buenos Aires | 70 | 35 |
City of Buenos Aires | 25 | 13 |
Catamarca | 5 | 3 |
Chaco | 7 | 4 |
Chubut | 5 | 2 |
Córdoba | 18 | 9 |
Corrientes | 7 | 3 |
Entre Ríos | 9 | 5 |
Formosa | 5 | 2 |
Jujuy | 6 | 3 |
La Pampa | 5 | 3 |
La Rioja | 5 | 2 |
Mendoza | 10 | 5 |
Misiones | 7 | 3 |
Neuquén | 5 | 3 |
Río Negro | 5 | 2 |
Salta | 7 | 3 |
San Juan | 6 | 3 |
San Luis | 5 | 3 |
Santa Cruz | 5 | 3 |
Santa Fe | 19 | 9 |
Santiago del Estero | 7 | 3 |
Tierra del Fuego | 5 | 2 |
Tucumán | 9 | 4 |
Total | 257 | 127 |
The 72 members of the Senate are elected in the same 24 constituencies, with three seats in each. The party receiving the most votes in each constituency wins two seats, with the third seat awarded to the second-placed party. [8] The 2025 elections will see one-third of senators renewed, with eight provinces electing three senators; Chaco, Entre Ríos, Neuquén, Río Negro, Salta, Santiago del Estero, Tierra del Fuego and the City of Buenos Aires. [7]
Opinion polling for the 2025 Argentine legislative election using Local regression (LOESS) of polls conducted. Kirchnerism and Federal Peronism entries merged into UXP. Data up to 11 April 2025.
Polling firm | Fieldwork date | Sample size | ![]() | Kirchnerism | Federal Peronism | ![]() | ![]() | ![]() | Others | Undecided | Lead |
---|---|---|---|---|---|---|---|---|---|---|---|
Tendencias | 18–23 April 2025 | 9490 | 36.1 | 33.7 | 2.1 | 9.2 | 2.4 | 5.7 | – | 10.8 | 2.4 |
Proyección | 29 March – 4 April 2025 | 2397 | 29.3 | 31.7 | – | 6.4 | 3.7 | 2.9 | 1.9 | 24.2 | 2.4 |
Tendencias | 29 March – 4 April 2025 | 8865 | 36.8 | 34.6 | 2.4 | 11.1 | 5.6 | - | 9.5 | 2.2 | |
Analogías | 28–31 March 2025 | 2864 | 30.8 | 30.2 | - | 10.8 | 5.3 | 4.3 | - | 18.6 | 0.6 |
Opina Argentina | 1–4 March 2025 | 2085 | 38 | 32 | 4 | 7 | 4 | 4 | 3 | 7 | 6 |
Analogías | 25–28 February 2025 | 2733 | 33.1 | 30.4 | - | 10.6 | 3.6 | 3 | 4.6 | 14.9 | 2.7 |
Tendencias | 24–28 February 2025 | 11077 | 40.9 | 35.1 | 1.9 | 8.2 | 5.8 | - | 8.1 | 5.8 | |
Poliarquía | February 2025 | — | 36 | 16 | 9 | 9 | 3 | 9 | 2 | 17 | 20 |
Isasi Burdman | February 2025 | — | 37 | 10 | 11 | 12 | 4 | 3 | 23 | 25 | |
Proyección | 17–22 February 2025 | 2029 | 28.8 | 17.9 | 15.4 | 5.8 | 3.3 | 2.2 | 2.7 | 23.9 | 10.9 |
Management & Fit | 10–21 February 2025 | 2200 | 41.6 | 26.7 | 9.4 | 6.4 | 2.6 | 3.5 | 3.1 | 6.6 | 14.9 |
Pulso Research | 1–7 February 2025 | 1777 | 31.4 | 18.4 | 5.4 | 6.3 | 3.3 | 4.5 | 9.4 | 21.2 | 13 |
Aresco | January 2025 | — | 47.2 | 36.1 | — | 7.9 | 6 | — | 2.8 | — | 11.1 |
Isasi Burdman | January 2025 | — | 36 | 9 | 12 | 10 | 4 | 3 | 4 | 21 | 24 |
Management & Fit | 26 January 2025 | — | 42.1 | 26.5 | 9.8 | 7 | 1.8 | 2.8 | 3 | 7 | 15.6 |
Analogías | 19–23 January 2025 | 2645 | 33.6 | 31.1 | — | 8.7 | 4.4 | 4.4 | — | 17.8 | 2.5 |
Pulso Research | 6–12 January 2025 | 1900 | 30.2 | 15.9 | 7 | 5 | 3.6 | 4 | 8.2 | 26.1 | 14.3 |
Polling firm | Fieldwork date | Sample size | ![]() | Kirchnerism | Federal Peronism | ![]() | ![]() | ![]() | Others | Undecided | Lead |
---|---|---|---|---|---|---|---|---|---|---|---|
D'Alessio Irol - Berensztein [9] | December 2024 | 1035 | 35 | 24 | — | 17 | 8 | 4 | 9 | 2 | 11 |
Isasi Burdman [10] | December 2024 | 2065 | 37 | 10 | 11 | 9 | 3 | 5 | 21 | 26 | |
Fixer [11] | 11–20 December 2024 | 1100 | 37 | 35 | 2 | 6 | 3 | 5 | — | 8 | 2 |
Synospsis [12] | 5–13 December 2024 | — | 39.8 | 26.8 | 11 | 5.7 | 2.9 | 2.9 | 4 | 6.9 | 13 |
Pulso Research [13] | 4–11 December 2024 | 1700 | 32.6 | 20.8 | 6 | 3.8 | 2.8 | 3.9 | 7.7 | 22.3 | 11.8 |
Aresco [14] | December 2024 | — | 45.4 | 34.3 | — | 7 | 4.1 | — | 9.1 | — | 11.1 |
CB Consultora [15] | 2–6 December 2024 | 1562 | 39.4 | 18.5 | 9 | 6.6 | 1.8 | 5.4 | 3.8 | 15 | 20.9 |
Sentimetro [16] | 3 December 2024 | 1100 | 46 | 14 | 6 | 7 | 2 | 6 | 3 | 16 | 32 |
Isasi-Burdman [17] | 20 November 2024 | 2091 | 34 | 7 | 15 | 14 | 2 | 4 | 21 | 19 | |
Opinión Lab [18] | 12 November 2024 | 1800 | 34 | 24 | 11 | 7 | 3 | 3 | 7 | 10 | 10 |
Pulso Research [19] | 4–11 November 2024 | 2091 | 32.3 | 15.7 | 6.3 | 5.7 | 1.8 | 2.9 | 10.2 | 25 | 16.6 |
Flxer | 5 November 2024 | 1790 | 34 | 33 | 3 | 7 | 2 | 5 | — | 14 | 1 |
Poliarquía [20] | October 2024 | — | 34 | 18 | 8 | 9 | 6 | 6 | 2 | 17 | 16 |
Opina Argentina [21] | 25 October 2024 | 1764 | 33 | 33 | 5 | 10 | 5 | 3 | 3 | 8 | Tie |
DC Consultores [22] | 22 October 2024 | — | 54.2 | 8.4 | 25.3 | 5.6 | 3.7 | 2.8 | — | — | 28.9 |
Proyección Consultores [23] | 16 October 2024 | 1822 | 27.2 | 20.5 | 14 | 8 | 5.7 | 3 | — | 21.6 | 6.7 |
Isasi/Burdman [24] | 12–17 October 2024 | 2057 | 28 | 9 | 16 | 13 | 4 | 4 | 3 | 23 | 12 |
Pulso Research [25] | 2–9 October 2024 | 2000 | 30 | 20.7 | 6.3 | 6.3 | 2.9 | 4.8 | 9.2 | 19.7 | 9.3 |
Poliarquía [26] | September 2024 | — | 35 | 16 | 12 | 10 | 4 | 4 | 1 | 19 | 19 |
Pulso Research [27] | 2–9 September 2024 | 2112 | 29.5 | 20.4 | 8.2 | 7.4 | 4.7 | 5.1 | 7.7 | 17 | 9.1 |
Poliarquía [28] | August 2024 | — | 39 | 13 | 5 | 13 | 2 | 5 | 1 | 21 | 26 |
Lucas Romero [29] | 8–14 August 2024 | 1186 | 30.9 | 15.8 | 22.2 | 9.4 | 3.6 | 4.7 | 2.2 | 11.2 | 8.7 |
Pulso Research [30] | 2–8 August 2024 | 2800 | 29.3 | 18.9 | 9.2 | 8.1 | 4.1 | 5.1 | 6.6 | 18.7 | 10.4 |
Poliarquía [31] | July 2024 | — | 36 | 15 | 8 | 14 | 3 | 5 | 2 | 18 | 21 |
Pulso Research [32] | 1–10 July 2024 | 2350 | 31.7 | 16.5 | 11.2 | 6.1 | 3.8 | 6.3 | 8.2 | 16.3 | 15.2 |
Pulso Research [33] | 1–10 June 2024 | 2661 | 33.5 | 18.6 | 8 | 5 | 4.7 | 5.3 | 5.4 | 19.5 | 14.9 |
Opinión Lab [34] | 3 June 2024 | 1538 | 37 | 17 | 13 | 7 | 3 | 4 | 8 | 12 | 20 |
Pulso Research [35] | 1–10 May 2024 | 2113 | 34.8 | 17 | 8.5 | 6.8 | 4.4 | 5.7 | — | 22.8 | 17.8 |
Pulso Research [36] | 4–15 April 2024 | 2014 | 31.7 | 15.1 | 12.1 | 5 | 5.3 | 6 | — | 24.8 | 16.6 |
Pulso Research [37] | 4–14 March 2024 | 1914 | 34.2 | 19.7 | 8.7 | 5.5 | 4.2 | 3.9 | — | 23.7 | 14.5 |
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