Santarém is one of the 22 multi-member constituencies of the Assembly of the Republic, the national legislature of Portugal.

The constituency currently elects nine of the 230 members of the Assembly of the Republic using the closed party-list proportional representation electoral system.

Santarém currently elects nine of the 230 members of the Assembly of the Republic using the closed party-list proportional representation electoral system.

Results of the 2024 legislative election held on 10 March 2024:[8] The following candidates were elected:[9] Luísa Areosa (CH); Mara Lagriminha Coelho (PS;); Pedro Correia (CH); Hugo Costa (PS); Pedro dos Santos Frazão (CH); Alexandra Leitão (PS); Isaura Morais (AD); João Moura (AD); and Eduardo Oliveira e Sousa (AD).

Results of the 1985 legislative election held on 6 October 1985:[32] The following candidates were elected:[33] Pedro Albuquerque (PS); Álvaro Brasileiro (APU); Paulo Campos (PRD); Fernando Condesso (PSD); Henrique Cruz (CDS); Cardoso e Cunha (PSD); Francisco Fernandes (PRD); Jorge Lacão (PS); Dias Lourenço (APU); Hermínio Martinho (PRD); Abílio Rodrigues (PSD); and Mário Santos (PSD).