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Arrentela is a former civil parish in the municipality (concelho) of Seixal, Lisbon metropolitan area, Portugal. In 2013, the parish merged into the new parish Seixal, Arrentela e Aldeia de Paio Pires. The population in 2011 was 28,886, in an area of 10.17 km². It is situated on the south side of the estuary of the river Tagus.

Seixal, Arrentela e Aldeia de Paio Pires is a civil parish in the municipality of Seixal, Portugal. It was formed in 2013 by the merger of the former parishes Seixal, Arrentela and Aldeia de Paio Pires. The population in 2011 was 44,920, in an area of 29.90 km².

Seixal is a former civil parish in the municipality (concelho) of Seixal, Lisbon metropolitan area, Portugal. In 2013, the parish merged into the new parish Seixal, Arrentela e Aldeia de Paio Pires. The population in 2011 was 2,776, in an area of 3.73 km². Its inhabitants are known as "Seixalenses".