District 1 () 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 is conterminous with the region of Arica y Parinacota. The district currently elects three 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 191,628 registered electors.
District 1 currently elects three of the 155 members of the Chamber of Deputies using the open party-list proportional representation electoral system. Parties may form electoral pacts with each other to pool their votes and increase their chances of winning seats. However, the number of candidates nominated by an electoral pact may not exceed the maximum number of candidates that a single party may nominate. Seats are allocated using the D'Hondt method.
Results of the 2021 general election held on 21 November 2021:
The following candidates were elected: Enrique Lee (PRI), 7,320 votes; Luis Malla (PL), 2,689 votes; and Vlado Mirosevic (PL), 16,819 votes.
Results of the 2017 general election held on 19 November 2017:
The following candidates were elected: Nino Baltolu (UDI), 9,272 votes; Vlado Mirosevic (PL), 24,273 votes; and Luis Rocafull (PS), 6,430 votes.