Turnout: 76.82%
About this election
The 2017 Argentine legislative elections, held on 22 October, were a midterm triumph for President Mauricio Macri. His Cambiemos coalition finished first nationally and led the vote in 13 of the 24 districts — a rare midterm advance for a sitting government — appearing to consolidate his project. The result also marked the return of Cristina Fernández de Kirchner to electoral politics, narrowly defeated in the symbolic Buenos Aires Province Senate race.
Half of the 257-seat Chamber of Deputies — 127 seats in 2017 — is renewed every two years by D'Hondt proportional representation in the 24 provincial-level constituencies, with a 3% district threshold. A third of the Senate is renewed at the same time. Voting is compulsory, and the PASO primaries in August had already pointed to a Cambiemos lead.
With the economy showing tentative signs of recovery, Macri's Cambiemos was rewarded, winning about 41.75% of the national vote and 61 of the 127 seats. The Peronist vote was fragmented between Cristina Fernández de Kirchner's Unidad Ciudadana, the orthodox Justicialist fronts and other provincial Peronist lists, which together outpolled Cambiemos but, divided, won fewer seats — a combined 54 across the various Peronist labels. Provincial parties and the centrist 1País front shared the rest. Turnout was 76.82%.
The victory was the high point of the Macri presidency. Emboldened, the government pursued pension and labour reforms, but within months the 2018 currency crisis and the return to the IMF shattered its momentum, and the apparent realignment of 2017 proved short-lived.
Cambiemos led across the City of Buenos Aires, Buenos Aires Province, Córdoba, Santa Fe, Mendoza and Entre Ríos — the country's most populous districts — which is why it led in seats despite the Peronist vote being larger in aggregate. The various Peronist lists held the northern provinces and the Patagonian south, while a number of provinces were carried by entrenched provincial parties.
Official results from Argentina's Cámara Nacional Electoral / Dirección Nacional Electoral (resultados.gob.ar). Because Peronism ran under several competing labels, the map shows the single leading list in each province; the national card groups the lists into blocs. Vote shares are of valid votes; per-province seat allocations are not shown.
Compiled and reviewed by Bartłomiej Paruzel, Election Data Analyst, from official results. See our data methodology.