Ego may refer to:

• Freud's psycho-analytic concept of the ego
• Egoism
• eGO Vehicles, makers of electric bicycles ^*
• EGO (German automobile company), a German company that existed between 1921 and 1926 that made small automobiles.
• Exhaust gas oxygen
• Elektrik Gaz Otobüs İşletmesi, the bus and metro operator of Ankara
• Ego the Living Planet, a character in the Marvel Universe.
• Ego, an album by German band Oomph!, released in 2001

EGO