Areia may refer to:
- Areia (trilobite)
- Areia, Paraíba, a city in Brazil
- Aria (satrapy), or Greek Areía, the Greek name form of a satrapy of the Achaemenid Empire in today's Afghanistan
- Athena, as an epithet
Areia is a genus of trilobite in the order Phacopida, which existed in what is now the Czech Republic. It was described by Barrande in 1872, and the type species is Areia bohemica.