55th National Congress of Chile

The*LV legislative period of the National Congress of Chile was the legislative term that followed the 2017 Chilean parliamentary election. It comprised members of the Senate and the Chamber of Deputies, and ran from 11 March 2018 to 10 March 2022.
In the 2017 electoral process, the Chamber of Deputies was fully renewed; deputies serve four-year terms and therefore served only during this legislative period. Twenty-three senators were also elected, representing the constituencies of Tarapacá, Arica and Parinacota, Atacama, Valparaíso, Maule, Araucanía, and Aysén. Their eight-year terms extended into the subsequent legislative period.
In the 2013 elections, 20 senators were elected, representing the constituencies of Antofagasta, Coquimbo, Metropolitana, O'Higgins, Biobío, Los Lagos, Los Ríos, and Magallanes; their terms concluded during this legislative period.
This was the only legislative period to operate with a composition of 155 deputies and 43 senators, as established by the electoral reform approved in 2015. From the subsequent legislative period, the National Congress would consist of 155 deputies and 50 senators, completing the composition set out in the reform.