Turnout: 71.39%
About this election
The 2021 Argentine legislative elections, held on 14 November after a pandemic-related delay, were a sharp midterm rebuke to the Peronist government of Alberto Fernández. The opposition Juntos por el Cambio finished first nationally and the governing Frente de Todos lost its quorum in the Senate for the first time in nearly four decades, as anger over inflation, lockdowns and falling living standards drove voters away.
127 of the 257 Chamber seats were renewed by D'Hondt proportional representation in the 24 provincial-level constituencies, with a 3% threshold, alongside a third of the Senate. The PASO primaries in September had already delivered a stinging defeat to the government, prompting a cabinet crisis and a pre-election spending push that failed to reverse the trend.
Juntos por el Cambio won about 42.13% of the national vote and 61 of the 127 seats, ahead of the Frente de Todos on 34.17% and 50 seats. The big story beyond the two main blocs was the breakthrough of the libertarian right: Javier Milei's La Libertad Avanza won its first seats, taking around 7% nationally and finishing a strong third in the City of Buenos Aires. The Workers' Left Front (5.53%) and a centrist federal list also won seats.
The defeat left the Frente de Todos without a Senate majority and deepened the rift between the president and vice-president, weakening the government for the remainder of its term. The election also launched Milei as a national figure, laying the groundwork for his stunning presidential victory two years later.
Juntos por el Cambio led across most of the country, including the symbolic loss for Peronism of Buenos Aires Province and traditional strongholds such as La Pampa. The Frente de Todos held a reduced set of northern provinces, while La Libertad Avanza's vote was concentrated in the City of Buenos Aires and surrounding districts.
The most consequential story of the night was not the swing between the two big blocs but the arrival of a third force. Javier Milei, a television economist running under the new La Libertad Avanza banner, finished a strong third in the City of Buenos Aires and was himself elected a national deputy for the capital. His anti-"caste," radically free-market message drew younger and protest voters who felt unrepresented by either coalition, and the handful of seats his list won in 2021 gave him a national platform. That platform, built over the following two years, carried him to the presidency in 2023 — making this midterm, in hindsight, the launch point of the most disruptive political career in recent Argentine history.
Placed in sequence, 2021 is the hinge of the cycle. In the 2019 election a reunited Peronism had swept back into office; two years on, inflation and pandemic fatigue produced this sharp rebuke; and by the 2023 election the contest had fractured three ways as Milei's movement overtook the traditional right. The Argentina hub sets the three midterms alongside one another, showing how quickly the Argentine electorate moved from a two-coalition system to a volatile three-way one.
Official results from Argentina's Cámara Nacional Electoral / Dirección Nacional Electoral (resultados.gob.ar). Vote shares are national aggregates of valid votes; the map shows the leading list in each province, with the full breakdown on click. Per-province seat allocations are not shown.
Compiled and reviewed by Bartłomiej Paruzel, Election Data Analyst, from official results. See our data methodology.