Turnout: 80.37%
About this election
Argentina's 2019 legislative elections renewed half of the Chamber of Deputies on 27 October, alongside the presidential election that returned Peronism to power. The Frente de Todos, the reunited Peronist front behind Alberto Fernández and Cristina Fernández de Kirchner, won the most seats, while the outgoing government's Juntos por el Cambio remained a strong opposition bloc.
130 of the 257 Chamber seats were renewed by D'Hondt proportional representation across the 24 provincial-level constituencies, with a 3% district threshold, for four-year terms. Held on the same day as the presidential vote, the legislative result closely followed the top of the ballot, and turnout was 80.37%.
The Frente de Todos won about 45.26% of the national vote and 64 of the 130 seats at stake, and Juntos por el Cambio 40.36% and 56 seats — a relatively even split that left neither bloc with an outright majority in the full chamber. Roberto Lavagna's Consenso Federal took 5.85% and 3 seats, with provincial parties sharing the remainder.
The new Frente de Todos government took office with a plurality but not a majority in the Chamber, relying on allied provincial blocs to legislate — an arithmetic that, combined with the pandemic and the economic crisis, constrained it throughout the term and contributed to its heavy midterm defeat two years later.
The Frente de Todos led across Buenos Aires Province, the northern provinces and most of the interior, while Juntos por el Cambio held the City of Buenos Aires, Córdoba, Santa Fe, Mendoza and Entre Ríos. The geography was almost identical to the concurrent presidential map.
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.