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