União das Freguesias da Póvoa de Varzim, Beiriz e Argivai is a major part of the Portuguese city of Póvoa de Varzim and the city's south side region.

[3] The south side of the city of Póvoa de Varzim has varied topologies and demographic measures.

It includes areas such as fishermen's Bairro Sul, Bairro Norte's beachfront highrises, Póvoa de Varzim's Ancient Roman and Medieval quarters around Bairro da Matriz, Largo das Dores, and Rua da Junqueira, the ancient parish of Argivai and Suburban Beiriz, with countryside estates and newer middle and upper-class residential areas.

Póvoa de Varzim, Beiriz e Argivai boasts an array of cultural and social offerings.

Argivai and Beiriz are ancient parishes with known records dating to the 11th century and the remaining were established in 1935, by splitting the Póvoa de Varzim parish, created around 1456.