District 21 (Chamber of Deputies of Chile)

District 21 (Spanish: Distrito 21) is one of the 28 multi-member electoral districts of the Chamber of Deputies, the lower house of the National Congress, the national legislature of Chile. The district was created by the 2015 electoral reform and came into being at the following general election in 2017. It consists of the provinces of Arauco and Biobío, and the commune of Lota in the province of Concepción in the region of Biobío. The district currently elects five of the 155 members of the Chamber of Deputies using the open party-list proportional representation electoral system. At the 2021 general election the district had 542,026 registered electors.