Arājs (feminine: Arāja) is a Latvian occupational surname, derived from the Latvian word for "ploughman". Individuals with the surname include:
Ronalds Arājs (born 1987), Latvian athlete Oskars Arājs (born 1990), Latvian handball player Viktors Arājs (1910–1988), Latvian collaborator and Nazi SS officer