2021 Argentine legislative election

Legislative elections were held in Argentina on 14 November 2021. Half of the seats in the Chamber of Deputies and a third of the seats in the Senate were renewed. The election had previously been scheduled to take place on 24 October 2021, but was postponed due to the COVID-19 pandemic in Argentina.

Open, Simultaneous and Mandatory Primaries (PASO) were previously scheduled to take place on 8 August 2021, but took place on 12 September 2021, having also been postponed due to COVID-19. There were proposals, backed by the ruling Frente de Todos, to scrap the primaries altogether due to the COVID-19 pandemic. The proposals were opposed by the Juntos por el Cambio opposition. In June 2021, it was agreed to reschedule the primaries alongside the general election instead.

127 of the 257 seats in the lower chamber were renewed, while eight provinces (Catamarca, Chubut, Córdoba, Corrientes, La Pampa, Mendoza, Santa Fe and Tucumán) each renewed their 3 senators, in total accounting for 24 out of 72 seats in the upper chamber.

The main opposition alliance, Together for Change, was seen as the big winner of the election. The governing Frente de Todos suffered big losses, losing its majority in the Senate for the first time in almost 40 years, and seeing defeats in stronghold provinces such as Buenos Aires and La Pampa. Observers attributed the loss to the widespread anger over high inflation and rising poverty.