Rajon may refer to:
- Rajon Rondo (born 1986), National Basketball Association player
- Claude Rajon (1866-1932), French politician
- Paul Adolphe Rajon (1843–1888), French painter and printmaker
- R. J. Anderson (born 1986), American hockey player nicknamed "Rajon"
- Rezaul Islam (born 1987), Bangladeshi cricketer nicknamed "Rajon"
- Rajon Music Group, one of the largest independent record labels in Australia
- Districts of Belarus (singular: rajon)
- Districts of Latvia (singular: rajons)