On 26 October 2025 Argentina held legislative elections to its bicameral National Congress, renewing half of the Chamber of Deputies (127 of 257 seats) and a third of the Senate (24 of 72 seats). Members are elected via proportional representation closed party-list. The elections are overseen by the Electoral Justice (Justicia Nacional Electoral), led by the National Electoral Chamber (Cámara Nacional Electoral)—the country’s highest electoral authority—and supported by 24 federal electoral courts.