Marja may refer to:

• Marja (name), a Finnish and Dutch female given name
• Marjah, Afghanistan, an unincorporated agricultural district in Nad Ali District, Helmand Province
• Marja', a Shia authority

• Humani generis redemptionem
• Humanim
• Human Immunodeficiency Virus
• Human immunodeficiency virus
• Human impact on the environment
• Human Imprint
• Human (Inheritance)
• Human intelligence
• Human Intelligence
• Human intelligence (intelligence gathering)
• Human interest
• Human Interest
• Human-interest story
• Human interface
• Human interface device
• Human interface devices
• Human interface guidelines
• Humanised antibody
• Humanism and Its Aspirations
• Humanist Canada
• Humanist (disambiguation)
• Humanistic
• Humanistic (album)
• Humanistic Buddhism
• Humanistic education