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 kmò. It is situated on the south side of the estuary of the river Tagus.
The freguesia of Arrentela included the following localities: