Areias (Portuguese plural form of sand) is a former civil parish in the municipality of Santo Tirso, Portugal. In 2013, the parish merged into the new parish Areias, Sequeiró, Lama e Palmeira. Located from the urban centre of Santo Tirso, its population numbers approximately 2,599 inhabitants (2001 census), in an area of ; its density is .
The iconic locality of Senhora da Torre, alongside the Ave, is the home to ancient ruins of castro from the Luso-Roman period of the region's history. It is also the location of a small chapel and lookout, the Miradouro da Senhora da Torre.
Until 1836 the parish was part of the municipality of Landim, until it was de-annexed and absorbed into Santo Tirso.
Areias is situated on the right margin of the Ave River, in the extreme north of the municipality.
The parish is notable for a few national monuments, including: